DAC7563TDSCT

Sample & Buy Product Folder Support & Community Tools & Software Technical Documents Reference Design DAC7562T, DAC7563T, DAC8162T DAC8163T, DAC8562T, DAC8563T SLASE61A – SEPTEMBER 2015 – REVISED OCTOBER 2015 DACxx6xT Dual 16-, 14-, 12-Bit, Low-Power, Voltage-Output DACs With 2.5-V, 4-PPM/°C Internal Reference, and 5-V TTL I/O 1 Features 3 Description • • • The DAC856xT, DAC816xT, and DAC756xT devices are low-power, voltage-output, dual-channel, 16-, 14-, and 12-bit digital-to-analog converters (DACs), respectively. These devices include a 2.5-V, 4-ppm/°C internal reference, giving a full-scale output voltage range of 2.5 V or 5 V. The internal reference has an initial accuracy of ±5 mV and can source or sink up to 20 mA at the VREFIN/VREFOUT pin. 1 • • • • • • • • • • Relative Accuracy: 4 LSB INL at 16 Bits Low Glitch Impulse: 0.1 nV-s Bidirectional Reference Pin: Input or 2.5-V Output – 4-ppm/°C Temperature Drift (Typ) Power-On Reset to Zero Scale or Mid-Scale Low-Power: 4 mW at 5-V AVDD Wide Power-Supply Range: 2.7 V to 5.5 V 50-MHz SPI With Schmitt-Triggered Inputs LDAC and CLR Functions Output Buffer With Rail-to-Rail Operation Pin-to-Pin Compatible With DAC8562 Family 5-V TTL I/O Enabled Packages: WSON-10 (3 mm × 3 mm), VSSOP-10 Temperature Range: –40°C to 125°C 2 Applications • • • • • • • Portable Instrumentation PLC Analog Output Module Bipolar Outputs (Section 9.2.2) Closed-Loop Servo Control Voltage Controlled Oscillator Tuning Data Acquisition Systems Programmable Gain and Offset Adjustment These devices are monotonic, providing excellent linearity and minimizing undesired code-to-code transient voltages (glitch). They use a versatile threewire serial interface that operates at clock rates up to 50 MHz. The interface is compatible with standard SPI™, QSPI™, Microwire, and digital signal processor (DSP) interfaces. The DACxx62T devices incorporate a power-on-reset circuit that ensures the DAC output powers up and remains at zero scale until a valid code is written to the device, whereas the DACxx63T devices similarly power up at mid-scale. These devices contain a power-down feature that reduces current consumption to typically 550 nA at 5 V. The low power consumption, internal reference, and small footprint make these devices ideal for portable, battery-operated equipment. The DACxx62T devices are drop-in and functioncompatible with each other, as are the DACxx63T devices. The entire family is available in VSSOP-10 and WSON-10 packages. Device Information(1) PART NUMBER PACKAGE BODY SIZE (NOM) DAC8562T DAC8162T VSSOP (10), WSON (10) 3.00 mm × 3.00 mm DAC7562T (1) For all available packages, see the orderable addendum at the end of the data sheet. Simplified Block Diagram GND AVDD DIN SCLK SYNC LDAC CLR Buffer Control Register Control Input Control Logic Control Logic DAC756xT (12-Bit) DAC816xT (14-Bit) DAC856xT (16-Bit) VREFIN/VREFOUT 2.5-V Reference PowerDown Control Logic Data Buffer B DAC Register B DAC VOUTB Data Buffer A DAC Register A DAC VOUTA 1 An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. PRODUCTION DATA. DAC7562T, DAC7563T, DAC8162T DAC8163T, DAC8562T, DAC8563T SLASE61A – SEPTEMBER 2015 – REVISED OCTOBER 2015 www.ti.com Table of Contents 1 2 3 4 5 6 7 Features .................................................................. Applications ........................................................... Description ............................................................. Revision History..................................................... Device Comparison Table..................................... Pin Configuration and Functions ......................... Specifications......................................................... 7.1 7.2 7.3 7.4 7.5 7.6 7.7 8 1 1 1 2 3 4 5 Absolute Maximum Ratings ...................................... 5 ESD Ratings ............................................................ 5 Recommended Operating Conditions....................... 5 Thermal Information .................................................. 5 Electrical Characteristics........................................... 6 Timing Requirements ................................................ 9 Typical Characteristics ............................................ 10 Detailed Description ............................................ 28 8.1 Overview ................................................................. 28 8.2 Functional Block Diagram ....................................... 28 8.3 Feature Description................................................. 28 8.4 Device Functional Modes........................................ 32 8.5 Programming........................................................... 36 9 Application and Implementation ........................ 39 9.1 Application Information............................................ 39 9.2 Typical Applications ................................................ 41 9.3 System Examples ................................................... 45 10 Power Supply Recommendations ..................... 46 11 Layout................................................................... 46 11.1 Layout Guidelines ................................................. 46 11.2 Layout Example .................................................... 47 12 Device and Documentation Support ................. 49 12.1 12.2 12.3 12.4 12.5 Related Links ........................................................ Community Resources.......................................... Trademarks ........................................................... Electrostatic Discharge Caution ............................ Glossary ................................................................ 49 49 49 49 49 13 Mechanical, Packaging, and Orderable Information ........................................................... 49 4 Revision History NOTE: Page numbers for previous revisions may differ from page numbers in the current version. Changes from Original (September 2015) to Revision A • 2 Page Changed From: Product Preview To: Production Data .......................................................................................................... 1 Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: DAC7562T DAC7563T DAC8162T DAC8163T DAC8562T DAC8563T DAC7562T, DAC7563T, DAC8162T DAC8163T, DAC8562T, DAC8563T www.ti.com SLASE61A – SEPTEMBER 2015 – REVISED OCTOBER 2015 5 Device Comparison Table DEVICE DAC7562T DAC7563T DAC8162T DAC8163T DAC8562T DAC8563T MAXIMUM RELATIVE ACCURACY (LSB) MAXIMUM DIFFERENTIAL NONLINEARITY (LSB) MAXIMUM REFERENCE DRIFT (ppm/°C) ±0.75 ±0.25 10 ±3 ±0.5 10 ±12 ±1 10 Copyright © 2015, Texas Instruments Incorporated RESET TO Zero Mid-scale Zero Mid-scale Zero Mid-scale Submit Documentation Feedback Product Folder Links: DAC7562T DAC7563T DAC8162T DAC8163T DAC8562T DAC8563T 3 DAC7562T, DAC7563T, DAC8162T DAC8163T, DAC8562T, DAC8563T SLASE61A – SEPTEMBER 2015 – REVISED OCTOBER 2015 www.ti.com 6 Pin Configuration and Functions DGS Package 10-Pin VSSOP (Top View) DSC Package 10-Pin WSON (Top View) VREFIN/VREFOUT VOUTA 1 9 AVDD VOUTB 2 3 8 DIN LDAC 4 7 SCLK CLR 5 6 SYNC VOUTA 1 10 VOUTB 2 GND (1) 10 (1) VREFIN/VREFOUT 9 AVDD 8 DIN GND 3 LDAC 4 7 SCLK CLR 5 6 SYNC Thermal Pad TI recommends connecting the thermal pad to the ground plane for better thermal dissipation. Pin Functions PIN NAME NO. I/O DESCRIPTION AVDD 9 I Power-supply input, 2.7 V to 5.5 V CLR 5 I Asynchronous clear input. The CLR input is falling-edge sensitive. On activation of CLR, zero scale (DACxx62T) or mid-scale (DACxx63T) is loaded to all input and DAC registers. This sets the DAC output voltages accordingly. The device exits clear code mode on the 24th falling edge of the next write to the device. Activating CLR during a write sequence aborts the write. DIN 8 I Serial data input. Data are clocked into the 24-bit input shift register on each falling edge of the serial clock input. Schmitt-trigger logic input GND 3 — Ground reference point for all circuitry on the device LDAC 4 I In synchronous mode, data update occurs with the falling edge of the 24th SCLK cycle, which follows a falling edge of SYNC. Such synchronous updates do not require the LDAC, which must be connected to GND permanently or asserted and held low before sending commands to the device. In asynchronous mode, the LDAC pin is used as a negative edge-triggered timing signal for simultaneous DAC updates. Multiple single-channel commands can be written in order to set different channel buffers to desired values and then make a falling edge on the LDAC pin to update the DAC output registers simultaneously. SCLK 7 I Serial clock input. Data can be transferred at rates up to 50 MHz. Schmitt-trigger logic input SYNC 6 I Level-triggered control input (active-low). This input is the frame synchronization signal for the input data. When SYNC goes low, it enables the input shift register, and data are sampled on subsequent falling clock edges. The DAC output updates following the 24th clock falling edge. If SYNC is taken high before the 23rd clock edge, the rising edge of SYNC acts as an interrupt, and the write sequence is ignored by the DAC756xT, DAC816xT, and DAC856xT devices. Schmitttrigger logic input VOUTA 1 O Analog output voltage from DAC-A VOUTB 2 O Analog output voltage from DAC-B VREFIN/VREFOUT 10 I/O Bidirectional voltage reference pin. If internal reference is used, 2.5-V output. 4 Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: DAC7562T DAC7563T DAC8162T DAC8163T DAC8562T DAC8563T DAC7562T, DAC7563T, DAC8162T DAC8163T, DAC8562T, DAC8563T www.ti.com SLASE61A – SEPTEMBER 2015 – REVISED OCTOBER 2015 7 Specifications 7.1 Absolute Maximum Ratings (1) Over operating ambient temperature range (unless otherwise noted). MIN MAX AVDD to GND –0.3 6 V CLR, DIN, LDAC, SCLK and SYNC input voltage to GND –0.3 AVDD + 0.3 V VOUT[A, B] to GND –0.3 AVDD + 0.3 V VREFIN/VREFOUT to GND –0.3 AVDD + 0.3 V Operating temperature range –40 125 °C 150 °C 150 °C Junction temperature, TJ Storage temperature, Tstg (1) –65 UNIT Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and do not imply functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating Conditions. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. 7.2 ESD Ratings VALUE V(ESD) (1) (2) Electrostatic discharge Human-body model (HBM), per ANSI/ESDA/JEDEC JS-001 (1) ±1000 Charged-device model (CDM), per JEDEC specification JESD22C101 (2) ±500 UNIT V JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process. JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process. 7.3 Recommended Operating Conditions over operating ambient temperature range (unless otherwise noted) MIN NOM MAX UNIT POWER SUPPLY Supply voltage AVDD to GND 2.7 5.5 V 0 AVDD V 0 AVDD V –40 125 °C DIGITAL INPUTS Digital input voltage CLR, DIN, LDAC, SCLK and SYNC REFERENCE INPUT VREFIN Reference input voltage TEMPERATURE RANGE TA Operating ambient temperature 7.4 Thermal Information DAC756xT, DAC816xT, DAC856xT THERMAL METRIC DSC (WSON) DGS (VSSOP) 10 PINS 10 PINS UNIT RθJA Junction-to-ambient thermal resistance 62.8 173.8 °C/W RθJC(top) Junction-to-case (top) thermal resistance 44.3 48.5 °C/W RθJB Junction-to-board thermal resistance 26.5 79.9 °C/W ψJT Junction-to-top characterization parameter 0.4 1.7 °C/W ψJB Junction-to-board characterization parameter 25.5 68.4 °C/W RθJC(bot) Junction-to-case (bottom) thermal resistance 46.2 N/A °C/W Copyright © 2015, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Links: DAC7562T DAC7563T DAC8162T DAC8163T DAC8562T DAC8563T 5 DAC7562T, DAC7563T, DAC8162T DAC8163T, DAC8562T, DAC8563T SLASE61A – SEPTEMBER 2015 – REVISED OCTOBER 2015 www.ti.com 7.5 Electrical Characteristics At AVDD = 2.7 V to 5.5 V and TA = –40°C to 125°C (unless otherwise noted). PARAMETER STATIC PERFORMANCE TEST CONDITIONS Resolution DAC756xT Using line passing through codes 32 and 4,064 Differential nonlinearity 12-bit monotonic MAX ±0.3 ±0.75 ±0.05 ±0.25 ±1 ±3 ±0.1 ±0.5 ±4 ±12 ±0.2 ±1 ±1 ±4 UNIT Using line passing through codes 128 and 16,256 Differential nonlinearity 14-bit monotonic Using line passing through codes 512 and 65,024 Differential nonlinearity 16-bit monotonic Extrapolated from two-point line (1), unloaded Offset error drift DAC register loaded with all 1s, DAC output unloaded ±0.03 ±0.2 Zero-code error DAC register loaded with all 0s, DAC output unloaded 1 4 ±2 Extrapolated from two-point line (1), unloaded ±0.01 Gain temperature coefficient LSB mV µV/°C Full-scale error Gain error LSB Bits ±2 Zero-code error drift LSB Bits 16 Relative accuracy Offset error Bits 14 Relative accuracy Resolution DAC856xT TYP 12 Relative accuracy Resolution DAC816xT MIN (1) % FSR mV µV/°C ±0.15 % FSR ppm FSR/°C ±1 OUTPUT CHARACTERISTICS (2) Output voltage range 0 Output voltage settling time (3) Slew rate DACs unloaded RL = 1 MΩ 0.75 RL = ∞ 1 RL = 2 kΩ 3 V µs 10 Measured between 20%–80% of a full-scale transition Capacitive load stability AVDD 7 V/µs nF Code-change glitch impulse 1-LSB change around major carry 0.1 nV-s Digital feedthrough SCLK toggling, SYNC high 0.1 nV-s Power-on glitch impulse RL = 2 kΩ, CL = 470 pF, AVDD = 5.5 V 40 mV Full-scale swing on adjacent channel, External reference 5 Full-scale swing on adjacent channel, Internal reference 15 Channel-to-channel dc crosstalk µV DC output impedance At mid-scale input 5 Ω Short-circuit current DAC outputs at full-scale, DAC outputs shorted to GND 40 mA Power-up time, including settling time Coming out of power-down mode 50 µs DAC output noise density TA = 25°C, at mid-scale input, fOUT = 1 kHz 90 nV/√Hz DAC output noise TA = 25°C, at mid-scale input, 0.1 Hz to 10 Hz 2.6 µVPP AC PERFORMANCE (2) LOGIC INPUTS (2) Input-pin leakage current Logic input LOW voltage VIL Logic input HIGH voltage VIH –1 ±0.1 1 µA 0 0.8 V 2.1 AVDD V 3 pF Pin capacitance (1) (2) (3) 6 16-bit: codes 512 and 65,024; 14-bit: codes 128 and 16,256; 12-bit: codes 32 and 4,064, All digital inputs kept at same IO levels before and after write to the DAC Specification based on design or characterization Transition time between 1 / 4 scale and 3 / 4 scale, including settling to within ±0.024% FSR Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: DAC7562T DAC7563T DAC8162T DAC8163T DAC8562T DAC8563T DAC7562T, DAC7563T, DAC8162T DAC8163T, DAC8562T, DAC8563T www.ti.com SLASE61A – SEPTEMBER 2015 – REVISED OCTOBER 2015 Electrical Characteristics (continued) At AVDD = 2.7 V to 5.5 V and TA = –40°C to 125°C (unless otherwise noted). PARAMETER TEST CONDITIONS MIN TYP MAX UNIT REFERENCE External reference current Reference input impedance External VREF = 2.5 V (when internal reference is disabled), all channels active using gain = 1 15 Internal reference disabled, gain = 1 170 Internal reference disabled, gain = 2 85 µA kΩ REFERENCE OUTPUT Output voltage TA = 25°C 2.495 2.5 2.505 Initial accuracy TA = 25°C –5 ±0.1 5 mV Output-voltage temperature drift Internal reference output voltage temperature drift is characterized from –40°C to 125°C. 4 10 ppm/°C Output-voltage noise f = 0.1 Hz to 10 Hz Output-voltage noise density (highfrequency noise) 12 TA = 25°C, f = 1 kHz, CL = 0 µF 250 TA = 25°C, f = 1 MHz, CL = 0 µF 30 TA = 25°C, f = 1 MHz, CL = 4.7 µF 10 V µVPP nV/√Hz Load regulation, sourcing (4) TA = 25°C 20 µV/mA Load regulation, sinking (4) TA = 25°C 185 µV/mA ±20 mA Output-current load capability (2) Line regulation TA = 25°C 50 µV/V Long-term stability or drift (aging) (4) TA = 25°C, time = 0 to 1900 hours 100 ppm First cycle 200 Thermal hysteresis (4) Additional cycles ppm 50 POWER REQUIREMENTS (5) AVDD = 3.6 V to 5.5 V, normal mode, internal reference off, Digital inputs at VDD or GND 0.25 AVDD = 3.6 V to 5.5 V, normal mode, internal reference off, Digital inputs at TTL level AVDD = 3.6 V to 5.5 V, normal mode, internal reference on, Digital inputs at VDD or GND 4 mA 0.9 AVDD = 3.6 V to 5.5 V, normal mode, internal reference on, Digital inputs at TTL level Power supply current (IDD) AVDD = 3.6 V to 5.5 V, power-down modes, Digital inputs at VDD or GND AVDD = 2.7 V to 3.6 V, normal mode, internal reference off, Digital inputs at VDD or GND 0.55 4 0.2 0.4 (4) (5) µA 0.8 mA 0.73 AVDD = 2.7 V to 3.6 V, normal mode, internal reference on, Digital inputs at TTL level AVDD = 2.7 V to 3.6 V, power-down modes, Digital inputs at VDD or GND 1.6 5 AVDD = 2.7 V to 3.6 V, normal mode, internal reference off, Digital inputs at TTL level AVDD = 2.7 V to 3.6 V, normal mode, internal reference on, Digital inputs at VDD or GND 0.5 1.4 1.8 0.35 3 µA See the Application Information section of this data sheet. Input code = mid-scale, no load Copyright © 2015, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Links: DAC7562T DAC7563T DAC8162T DAC8163T DAC8562T DAC8563T 7 DAC7562T, DAC7563T, DAC8162T DAC8163T, DAC8562T, DAC8563T SLASE61A – SEPTEMBER 2015 – REVISED OCTOBER 2015 www.ti.com Electrical Characteristics (continued) At AVDD = 2.7 V to 5.5 V and TA = –40°C to 125°C (unless otherwise noted). PARAMETER TYP MAX AVDD = 3.6 V to 5.5 V, normal mode, internal reference off, Digital inputs at VDD or GND 0.9 2.75 AVDD = 3.6 V to 5.5 V, normal mode, internal reference on, Digital inputs at VDD or GND 3.2 8.8 2 22 AVDD = 2.7 V to 3.6 V, normal mode, internal reference off, Digital inputs at VDD or GND 0.54 1.44 AVDD = 2.7 V to 3.6 V, normal mode, internal reference on, Digital inputs at VDD or GND 1.97 5 AVDD = 2.7 V to 3.6 V, power-down modes, Digital inputs at VDD or GND 0.95 10.8 AVDD = 3.6 V to 5.5 V, power-down modes, Digital inputs at VDD or GND Power dissipation 8 TEST CONDITIONS Submit Documentation Feedback MIN UNIT mW µW mW µW Copyright © 2015, Texas Instruments Incorporated Product Folder Links: DAC7562T DAC7563T DAC8162T DAC8163T DAC8562T DAC8563T DAC7562T, DAC7563T, DAC8162T DAC8163T, DAC8562T, DAC8563T www.ti.com SLASE61A – SEPTEMBER 2015 – REVISED OCTOBER 2015 7.6 Timing Requirements (1) (2) At AVDD = 2.7 V to 5.5 V, external VREFIN = 2.5 V to 5.5 V, and over –40°C to 125°C (unless otherwise noted). See Figure 1. DAC756xT, DAC816xT, DAC856xT MIN TYP UNIT MAX f(SCLK) Serial clock frequency t(1) SCLK falling edge to SYNC falling edge (for successful write operation) 10 ns t(2) SCLK cycle time 20 ns t(3) SYNC rising edge to 23rd SCLK falling edge (for successful SYNC interrupt) 13 ns t(4) Minimum SYNC HIGH time 15 ns t(5) SYNC to SCLK falling edge setup time 13 ns t(6) SCLK LOW time 8 ns t(7) SCLK HIGH time 8 ns t(8) SCLK falling edge to SYNC rising edge 10 ns t(9) Data setup time 6 ns t(10) Data hold time 6 ns t(11) SCLK falling edge to LDAC falling edge for asynchronous LDAC update mode 5 ns t(12) LDAC pulse duration, LOW time 10 ns t(13) CLR pulse duration, LOW time 80 t(14) CLR falling edge to start of VOUT transition (1) (2) 50 MHz ns 100 ns All input signals are specified with tr = tf = 1 ns/V (10% to 90% of AVDD) and timed from a voltage level of (VIL + VIH) / 2. See the Serial Write Operation timing diagram (Figure 1). t(1) t(2) SCLK t(6) t(5) t(3) t(7) t(8) t(4) SYNC t(10) t(9) DIN DB23 DB0 t(12) t(11) LDAC(1) LDAC(2) t(13) CLR t(14) VOUTx (1) Asynchronous LDAC update mode. For more information, see the LDAC Functionality section. (2) Synchronous LDAC update mode; LDAC remains low. For more information, see the LDAC Functionality section. Figure 1. Timing Diagram, Serial Write Operation Copyright © 2015, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Links: DAC7562T DAC7563T DAC8162T DAC8163T DAC8562T DAC8563T 9 DAC7562T, DAC7563T, DAC8162T DAC8163T, DAC8562T, DAC8563T SLASE61A – SEPTEMBER 2015 – REVISED OCTOBER 2015 www.ti.com 7.7 Typical Characteristics Table 1. Typical Characteristics: Internal Reference Performance POWER-SUPPLY VOLTAGE MEASUREMENT FIGURE NUMBER Internal Reference Voltage vs Temperature Figure 2 Internal Reference Voltage Temperature Drift Histogram Figure 3 Internal Reference Voltage vs Load Current 5.5 V Figure 4 Internal Reference Voltage vs Time Figure 5 Internal Reference Noise Density vs Frequency Figure 6 Internal Reference Voltage vs Supply Voltage 2.7 V–5.5 V Figure 7 Table 2. Typical Characteristics: DAC Static Performance POWER-SUPPLY VOLTAGE MEASUREMENT FIGURE NUMBER FULL-SCALE, GAIN, OFFSET AND ZERO-CODE ERRORS Full-Scale Error vs Temperature Figure 16 Gain Error vs Temperature 5.5 V Offset Error vs Temperature Figure 17 Figure 18 Zero-Code Error vs Temperature Figure 19 Full-Scale Error vs Temperature Figure 63 Gain Error vs Temperature 2.7 V Offset Error vs Temperature Zero-Code Error vs Temperature Figure 64 Figure 65 Figure 66 LOAD REGULATION DAC Output Voltage vs Load Current 5.5 V Figure 30 2.7 V Figure 74 DIFFERENTIAL NONLINEARITY ERROR Differential Linearity Error vs Digital Input Code T = –40°C Figure 9 T = 25°C Figure 11 T = 125°C 5.5 V Differential Linearity Error vs Temperature Figure 15 T = –40°C Differential Linearity Error vs Digital Input Code Figure 13 T = 25°C T = 125°C Figure 56 2.7 V Differential Linearity Error vs Temperature Figure 58 Figure 60 Figure 62 INTEGRAL NONLINEARITY ERROR (RELATIVE ACCURACY) T = –40°C Linearity Error vs Digital Input Code T = 25°C T = 125°C Figure 8 5.5 V Linearity Error vs Temperature T = 25°C T = 125°C Figure 55 2.7 V Linearity Error vs Temperature 10 Submit Documentation Feedback Figure 12 Figure 14 T = –40°C Linearity Error vs Digital Input Code Figure 10 Figure 57 Figure 59 Figure 61 Copyright © 2015, Texas Instruments Incorporated Product Folder Links: DAC7562T DAC7563T DAC8162T DAC8163T DAC8562T DAC8563T DAC7562T, DAC7563T, DAC8162T DAC8163T, DAC8562T, DAC8563T www.ti.com SLASE61A – SEPTEMBER 2015 – REVISED OCTOBER 2015 Table 2. Typical Characteristics: DAC Static Performance (continued) MEASUREMENT POWER-SUPPLY VOLTAGE FIGURE NUMBER POWER-DOWN CURRENT Power-Down Current vs Temperature Power-Down Current vs Power-Supply Voltage Power-Down Current vs Temperature 5.5 V Figure 28 2.7 V – 5.5 V Figure 29 2.7 V Figure 73 POWER-SUPPLY CURRENT Power-Supply Current vs Temperature Power-Supply Current vs Digital Input Code Power-Supply Current Histogram Power-Supply Current vs Power-Supply Voltage Power-Supply Current vs Temperature Power-Supply Current vs Digital Input Code Power-Supply Current Histogram Power-Supply Current vs Temperature Power-Supply Current vs Digital Input Code Power-Supply Current Histogram External VREF Figure 20 Internal VREF Figure 21 External VREF Internal VREF Figure 22 5.5 V Figure 23 External VREF Figure 24 Internal VREF Figure 25 External VREF Internal VREF Figure 26 2.7 V – 5.5 V Figure 27 External VREF Figure 49 Internal VREF Figure 50 External VREF Internal VREF Figure 51 3.6 V Figure 52 External VREF Figure 53 Internal VREF Figure 54 External VREF Figure 67 Internal VREF Figure 68 External VREF Internal VREF Figure 69 2.7 V Figure 70 External VREF Figure 71 Internal VREF Figure 72 Table 3. Typical Characteristics: DAC Dynamic Performance MEASUREMENT POWER-SUPPLY VOLTAGE FIGURE NUMBER CHANNEL-TO-CHANNEL CROSSTALK Channel-to-Channel Crosstalk 5-V Rising Edge 5-V Falling Edge 5.5 V Figure 43 Figure 44 CLOCK FEEDTHROUGH Clock Feedthrough 500 kHz, Midscale 5.5 V Figure 48 2.7 V Figure 87 GLITCH IMPULSE Glitch Impulse, 1-LSB Step Glitch Impulse, 4-LSB Step Glitch Impulse, 16-LSB Step Rising Edge, Code 7FFFh to 8000h Figure 37 Falling Edge, Code 8000h to 7FFFh Figure 38 Rising Edge, Code 7FFCh to 8000h Falling Edge, Code 8000h to 7FFCh 5.5 V Figure 39 Figure 40 Rising Edge, Code 7FF0h to 8000h Figure 41 Falling Edge, Code 8000h to 7FF0h Figure 42 Copyright © 2015, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Links: DAC7562T DAC7563T DAC8162T DAC8163T DAC8562T DAC8563T 11 DAC7562T, DAC7563T, DAC8162T DAC8163T, DAC8562T, DAC8563T SLASE61A – SEPTEMBER 2015 – REVISED OCTOBER 2015 www.ti.com Table 3. Typical Characteristics: DAC Dynamic Performance (continued) MEASUREMENT Glitch Impulse, 1-LSB Step Glitch Impulse, 4-LSB Step Glitch Impulse, 16-LSB Step POWER-SUPPLY VOLTAGE FIGURE NUMBER Rising Edge, Code 7FFFh to 8000h Figure 79 Falling Edge, Code 8000h to 7FFFh Figure 80 Rising Edge, Code 7FFCh to 8000h Falling Edge, Code 8000h to 7FFCh 2.7 V Figure 81 Figure 82 Rising Edge, Code 7FF0h to 8000h Figure 83 Falling Edge, Code 8000h to 7FF0h Figure 84 NOISE DAC Output Noise Density vs Frequency External VREF DAC Output Noise 0.1 Hz to 10 Hz External VREF Internal VREF Figure 45 5.5 V Figure 46 Figure 47 POWER-ON GLITCH Reset to Zero Scale Reset to Midscale Power-On Glitch Reset to Zero Scale Reset to Midscale 5.5 V 2.7 V Figure 35 Figure 36 Figure 85 Figure 86 SETTLING TIME Full-Scale Settling Time Half-Scale Settling Time Full-Scale Settling Time Half-Scale Settling Time 12 Rising Edge, Code 0h to FFFFh Falling Edge, Code FFFFh to 0h Rising Edge, Code 4000h to C000h Figure 31 5.5 V Figure 32 Figure 33 Falling Edge, Code C000h to 4000h Figure 34 Rising Edge, Code 0h to FFFFh Figure 75 Falling Edge, Code FFFFh to 0h Rising Edge, Code 4000h to C000h 2.7 V Falling Edge, Code C000h to 4000h Submit Documentation Feedback Figure 76 Figure 77 Figure 78 Copyright © 2015, Texas Instruments Incorporated Product Folder Links: DAC7562T DAC7563T DAC8162T DAC8163T DAC8562T DAC8563T DAC7562T, DAC7563T, DAC8162T DAC8163T, DAC8562T, DAC8563T www.ti.com SLASE61A – SEPTEMBER 2015 – REVISED OCTOBER 2015 7.7.1 Typical Characteristics: Internal Reference At TA = 25°C, AVDD = 5.5 V, gain = 2, and VREFOUT unloaded, unless otherwise noted. 30 2.505 2.504 25 2.503 Population (%) 2.501 2.500 2.499 2.498 2.497 15 10 5 60 units shown (30 MSOP, 30 SON-10) 2.496 0 2.495 −40 −25 −10 5 20 35 50 65 Temperature (°C) 80 95 110 125 Temperature Drift (ppm/ °C) Figure 2. Internal Reference Voltage vs Temperature Figure 3. Internal Reference Voltage, Temperature Drift Histogram 400 Internal Reference Voltage Shift (ppm) 2.510 2.505 VREFOUT (V) 20 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0 7.5 8.0 8.5 9.0 9.5 10.0 VREFOUT (V) 2.502 2.500 2.495 2.490 −20 −15 −10 −5 0 5 Load Current (mA) 10 15 300 200 100 0 −100 −200 −300 −400 20 Figure 4. Internal Reference Voltage vs Load Current 0 250 500 750 1000 Elapsed Time (Hours) 1250 1500 Figure 5. Internal Reference Voltage vs Time 400 2.505 No Load 4.7 µF Load 350 −40°C +25°C +125°C 2.504 2.503 300 2.502 250 VREFOUT (V) Voltage Noise (nV/rt−Hz) 16 units shown (8 MSOP, 8 SON-10) Average shown in dashed line 200 150 2.501 2.500 2.499 2.498 100 2.497 50 0 2.496 10 100 1k 10k Frequency (Hz) 100k 1M Figure 6. Internal Reference Noise Density vs Frequency Copyright © 2015, Texas Instruments Incorporated 2.495 2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5 AVDD (V) Figure 7. Internal Reference Voltage vs Supply Voltage Submit Documentation Feedback Product Folder Links: DAC7562T DAC7563T DAC8162T DAC8163T DAC8562T DAC8563T 13 DAC7562T, DAC7563T, DAC8162T DAC8163T, DAC8562T, DAC8563T SLASE61A – SEPTEMBER 2015 – REVISED OCTOBER 2015 www.ti.com 7.7.2 Typical Characteristics: DAC at AVDD = 5.5 V At TA = 25°C, 5-V external reference used, gain = 1 and DAC output not loaded, unless otherwise noted. 12 1.0 9 0.8 0.6 DNL Error (LSB) INL Error (LSB) 6 3 0 −3 0.4 0.2 0.0 −0.2 −0.4 −6 −0.6 −9 −12 Typical channel shown −40°C 0 Typical channel shown −40°C −0.8 −1.0 8192 16384 24576 32768 40960 49152 57344 65536 Digital Input Code Figure 8. Linearity Error vs Digital Input Code (–40°C) 0 8192 16384 24576 32768 40960 49152 57344 65536 Digital Input Code Figure 9. Differential Linearity Error vs Digital Input Code (–40°C) 12 1.0 9 0.8 0.6 DNL Error (LSB) INL Error (LSB) 6 3 0 −3 0.4 0.2 0.0 −0.2 −0.4 −6 −0.6 −9 −12 Typical channel shown 25°C 0 Typical channel shown 25°C −0.8 −1.0 8192 16384 24576 32768 40960 49152 57344 65536 Digital Input Code Figure 10. Linearity Error vs Digital Input Code (25°C) 0 8192 16384 24576 32768 40960 49152 57344 65536 Digital Input Code Figure 11. Differential Linearity Error vs Digital Input Code (25°C) 12 1.0 9 0.8 0.6 DNL Error (LSB) INL Error (LSB) 6 3 0 −3 0.4 0.2 0.0 −0.2 −0.4 −6 −0.6 −9 −12 Typical channel shown 125°C 0 8192 16384 24576 32768 40960 49152 57344 65536 Digital Input Code Figure 12. Linearity Error vs Digital Input Code (125°C) 14 Submit Documentation Feedback Typical channel shown 125°C −0.8 −1.0 0 8192 16384 24576 32768 40960 49152 57344 65536 Digital Input Code Figure 13. Differential Linearity Error vs Digital Input Code (125°C) Copyright © 2015, Texas Instruments Incorporated Product Folder Links: DAC7562T DAC7563T DAC8162T DAC8163T DAC8562T DAC8563T DAC7562T, DAC7563T, DAC8162T DAC8163T, DAC8562T, DAC8563T www.ti.com SLASE61A – SEPTEMBER 2015 – REVISED OCTOBER 2015 Typical Characteristics: DAC at AVDD = 5.5 V (continued) At TA = 25°C, 5-V external reference used, gain = 1 and DAC output not loaded, unless otherwise noted. 12 1.0 INL Max INL Min 9 DNL Max DNL Min 0.8 0.6 DNL Error (LSB) INL Error (LSB) 6 3 0 −3 0.4 0.2 0.0 −0.2 −0.4 −6 −0.6 −9 Typical channel shown −12 −40 −25 −10 5 20 35 50 65 Temperature (°C) −0.8 80 95 Typical channel shown −1.0 −40 −25 −10 5 20 35 50 65 Temperature (°C) 110 125 Figure 14. Linearity Error vs Temperature 95 110 125 Figure 15. Differential Linearity Error vs Temperature 0.20 0.15 Ch A Ch B 0.15 Ch A Ch B 0.10 0.10 Gain Error (%FSR) Full−Scale Error (%FSR) 80 0.05 0.00 −0.05 0.05 0.00 −0.05 −0.10 −0.10 −0.15 −0.20 −40 −25 −10 5 20 35 50 65 Temperature (°C) 80 95 −0.15 −40 −25 −10 110 125 Figure 16. Full-Scale Error vs Temperature 20 35 50 65 Temperature (°C) 80 95 110 125 Figure 17. Gain Error vs Temperature 4 4.0 Ch A Ch B 3 1 0 −1 −2 −3 Ch A Ch B 3.5 Zero−Code Error (mV) 2 Offset Error (mV) 5 3.0 2.5 2.0 1.5 1.0 0.5 −4 −40 −25 −10 5 20 35 50 65 Temperature (°C) 80 95 Figure 18. Offset Error vs Temperature Copyright © 2015, Texas Instruments Incorporated 110 125 0.0 −40 −25 −10 5 20 35 50 65 Temperature (°C) 80 95 110 125 Figure 19. Zero-Code Error vs Temperature Submit Documentation Feedback Product Folder Links: DAC7562T DAC7563T DAC8162T DAC8163T DAC8562T DAC8563T 15 DAC7562T, DAC7563T, DAC8162T DAC8163T, DAC8562T, DAC8563T SLASE61A – SEPTEMBER 2015 – REVISED OCTOBER 2015 www.ti.com Typical Characteristics: DAC at AVDD = 5.5 V (continued) 0.50 1.3 0.45 1.2 Power−Supply Current (mA) 0.40 0.35 0.30 0.25 0.20 0.15 0.10 1.1 1.0 0.9 0.8 0.7 0.6 0.05 0.00 −40 −25 −10 5 20 35 50 65 Temperature (°C) 80 95 0.5 −40 −25 −10 110 125 0.50 1.3 0.45 1.2 0.40 0.35 0.30 0.25 0.20 0.15 0.10 80 95 110 125 1.1 1.0 0.9 0.8 0.7 Internal reference enabled, Gain = 2 0 0.5 8192 16384 24576 32768 40960 49152 57344 65536 Digital Input Code 0 8192 16384 24576 32768 40960 49152 57344 65536 Digital Input Code Figure 23. Power-Supply Current vs Digital Input Code 30 30 25 25 20 20 Population (%) Figure 22. Power-Supply Current vs Digital Input Code 15 10 10 0.45 0.43 0.41 0.39 0.37 0.35 0.33 0.31 0.29 0.27 0.25 0.23 0 0.21 0 0.19 5 0.17 Internal reference enabled Gain = 2 15 5 0.15 Population (%) 20 35 50 65 Temperature (°C) 0.6 0.05 16 5 Figure 21. Power-Supply Current vs Temperature Power−Supply Current (mA) Power−Supply Current (mA) Figure 20. Power-Supply Current vs Temperature 0.00 Internal reference enabled DACs at midscale code, Gain = 2 DACs at midscale code 0.30 0.35 0.40 0.45 0.50 0.55 0.60 0.65 0.70 0.75 0.80 0.85 0.90 0.95 1.00 1.05 1.10 1.15 1.20 1.25 1.30 Power−Supply Current (mA) At TA = 25°C, 5-V external reference used, gain = 1 and DAC output not loaded, unless otherwise noted. Power Supply Current (mA) Power Supply Current (mA) Figure 24. Power-Supply Current Histogram Figure 25. Power-Supply Current Histogram Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: DAC7562T DAC7563T DAC8162T DAC8163T DAC8562T DAC8563T DAC7562T, DAC7563T, DAC8162T DAC8163T, DAC8562T, DAC8563T www.ti.com SLASE61A – SEPTEMBER 2015 – REVISED OCTOBER 2015 Typical Characteristics: DAC at AVDD = 5.5 V (continued) At TA = 25°C, 5-V external reference used, gain = 1 and DAC output not loaded, unless otherwise noted. 0.50 1.3 VREFIN = 2.5 V DACs at midscale code, Gain = 1 1.2 Power−Supply Current (mA) Power−Supply Current (mA) 0.45 0.40 0.35 0.30 0.25 0.20 0.15 0.10 Internal reference enabled DACs at midscale code, Gain = 1 1.1 1.0 0.9 0.8 0.7 0.6 0.05 0.00 2.7 3.1 3.5 3.9 4.3 4.7 5.1 0.5 2.7 5.5 3.1 3.5 AVDD (V) 4.3 4.7 5.1 5.5 AVDD (V) Figure 26. Power-Supply Current vs Power-Supply Voltage Figure 27. Power-Supply Current vs Power-Supply Voltage 4.0 0.60 Power−Down Current (µA) 3.5 Power−Down Current (µA) 3.9 3.0 2.5 2.0 1.5 1.0 0.5 0.0 −40 −25 −10 5 20 35 50 65 Temperature (°C) 80 95 IDD (µA) IREFIN (µA) 0.50 0.40 0.30 0.20 0.10 0.00 2.7 110 125 3.1 3.5 G028 Figure 28. Power-Down Current vs Temperature 3.9 4.3 AVDD (V) 4.7 5.1 5.5 G029 Figure 29. Power-Down Current vs Power-Supply Voltage 7.0 Typical channel shown Full scale Mid scale Zero scale 6.0 Output Voltage (V) 5.0 4.0 3.0 2.0 1.0 0.0 −1.0 −20 −15 −10 −5 0 5 10 15 20 ILOAD (mA) Figure 30. DAC Output Voltage vs Load Current Copyright © 2015, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Links: DAC7562T DAC7563T DAC8162T DAC8163T DAC8562T DAC8563T 17 DAC7562T, DAC7563T, DAC8162T DAC8163T, DAC8562T, DAC8563T SLASE61A – SEPTEMBER 2015 – REVISED OCTOBER 2015 www.ti.com Typical Characteristics: DAC at AVDD = 5.5 V (continued) At TA = 25°C, 5-V external reference used, gain = 1 and DAC output not loaded, unless otherwise noted. LDAC Trigger (5 V/div) LDAC Trigger (5 V/div) Large Signal VOUT (2 V/div) Large Signal VOUT (2 V/div) Small Signal Settling (1.22 mV/div = 0.024% FSR) Small Signal Settling (1.22 mV/div = 0.024% FSR) From Code: FFFFh To Code: 0h From Code: 0h To Code: FFFFh Time (5 μs/div) Time (5 μs/div) Figure 31. Full-Scale Settling Time, Rising Edge Figure 32. Full-Scale Settling Time, Falling Edge LDAC Trigger (5 V/div) LDAC Trigger (5 V/div) Large Signal VOUT (2 V/div) Large Signal VOUT (2 V/div) Small Signal Settling (1.22 mV/div = 0.024% FSR) Small Signal Settling (1.22 mV/div = 0.024% FSR) From Code: 4000h To Code: C000h Time (5 μs/div) From Code: C000h To Code: 4000h Time (5 μs/div) Figure 33. Half-Scale Settling Time, Rising Edge AVDD (2 V/div) Figure 34. Half-Scale Settling Time, Falling Edge AVDD (2 V/div) VOUTA (1 V/div) VOUTB (1 V/div) VOUTA (50 mV/div) VOUTB (50 mV/div) VREFIN shorted to AVDD VREFIN shorted to AVDD Time (1 ms/div) Figure 35. Power-On Glitch, Reset to Zero Scale 18 Submit Documentation Feedback Time (1 ms/div) Figure 36. Power-On Glitch, Reset to Midscale Copyright © 2015, Texas Instruments Incorporated Product Folder Links: DAC7562T DAC7563T DAC8162T DAC8163T DAC8562T DAC8563T DAC7562T, DAC7563T, DAC8162T DAC8163T, DAC8562T, DAC8563T www.ti.com SLASE61A – SEPTEMBER 2015 – REVISED OCTOBER 2015 Typical Characteristics: DAC at AVDD = 5.5 V (continued) At TA = 25°C, 5-V external reference used, gain = 1 and DAC output not loaded, unless otherwise noted. LDAC Trigger (5 V/div) LDAC Trigger (5 V/div) LDAC Feedthrough Glitch Impulse » 0.1 nV-s VOUT (100 μV/div) VOUT (100 μV/div) LDAC Feedthrough Glitch Impulse » 0.12 nV-s From Code: 7FFFh To Code: 8000h Time (5 μs/div) From Code: 8000h To Code: 7FFFh Time (5 μs/div) Figure 37. Glitch Impulse, Rising Edge, 1-LSB Step Figure 38. Glitch Impulse, Falling Edge, 1-LSB Step LDAC Trigger (5 V/div) LDAC Trigger (5 V/div) Glitch Impulse » 0.1 nV-s LDAC Feedthrough VOUT (100 μV/div) VOUT (100 μV/div) LDAC Feedthrough Glitch Impulse » 0.14 nV-s From Code: 8000h To Code: 7FFCh From Code: 7FFCh To Code: 8000h Time (5 μs/div) Time (5 μs/div) Figure 39. Glitch Impulse, Rising Edge, 4-LSB Step Figure 40. Glitch Impulse, Falling Edge, 4-LSB Step LDAC Trigger (5 V/div) LDAC Trigger (5 V/div) Glitch Impulse » 0.1 nV-s VOUT (500 μV/div) LDAC Feedthrough LDAC Feedthrough Glitch Impulse » 0.1 nV-s VOUT (500 μV/div) From Code: 7FF0h To Code: 8000h Time (5 μs/div) Figure 41. Glitch Impulse, Rising Edge, 16-LSB Step Copyright © 2015, Texas Instruments Incorporated From Code: 8000h To Code: 7FF0h Time (5 μs/div) Figure 42. Glitch Impulse, Falling Edge, 16-LSB Step Submit Documentation Feedback Product Folder Links: DAC7562T DAC7563T DAC8162T DAC8163T DAC8562T DAC8563T 19 DAC7562T, DAC7563T, DAC8162T DAC8163T, DAC8562T, DAC8563T SLASE61A – SEPTEMBER 2015 – REVISED OCTOBER 2015 www.ti.com Typical Characteristics: DAC at AVDD = 5.5 V (continued) At TA = 25°C, 5-V external reference used, gain = 1 and DAC output not loaded, unless otherwise noted. LDAC Trigger (5 V/div) LDAC Trigger (5 V/div) VOUTB (1 V/div) 6.4 μs Glitch Area (Between Cursors) = 2 nV-s VOUTA (500 μV/div) VOUTA (500 μV/div) VOUTA at Midscale Code Internal Reference Enabled Gain = 2 Glitch Area (Between Cursors) = 1.6 nV-s 7.3 μs VOUTB (1 V/div) VOUTA at Midscale Code Internal Reference Enabled Gain = 2 Time (5 μs/div) Time (5 μs/div) Figure 43. Channel-to-Channel Crosstalk, 5-V Rising Edge Figure 44. Channel-to-Channel Crosstalk, 5-V Falling Edge 1400 1400 Voltage Noise (nV/rt−Hz) 1200 Full Scale Mid Scale Zero Scale 1000 800 600 400 200 0 Internal reference enabled Gain = 2 1200 Voltage Noise (nV/rt−Hz) Internal reference disabled VREFIN = 5 V, Gain = 1 Full Scale Mid Scale Zero Scale 1000 800 600 400 200 10 100 1k Frequency (Hz) 10k 100k Figure 45. DAC Output Noise Density vs Frequency 0 10 100 1k Frequency (Hz) 10k 100k Figure 46. DAC Output Noise Density vs Frequency VNOISE (1 μV/div) SCLK (5 V/div) VOUT (500 μV/div) » 2.5 μVPP Clock Feedthrough Impulse » 0.06 nV-s DAC = Midscale Time (500 ns/div) Figure 47. DAC Output Noise, 0.1 Hz to 10 Hz 20 Submit Documentation Feedback Figure 48. Clock Feedthrough, 500 kHz, Midscale Copyright © 2015, Texas Instruments Incorporated Product Folder Links: DAC7562T DAC7563T DAC8162T DAC8163T DAC8562T DAC8563T DAC7562T, DAC7563T, DAC8162T DAC8163T, DAC8562T, DAC8563T www.ti.com SLASE61A – SEPTEMBER 2015 – REVISED OCTOBER 2015 7.7.3 Typical Characteristics: DAC at AVDD = 3.6 V 0.50 1.3 0.45 1.2 Power−Supply Current (mA) 0.40 0.35 0.30 0.25 0.20 0.15 0.10 1.1 1.0 0.9 0.8 0.7 0.6 0.05 0.00 −40 −25 −10 5 20 35 50 65 Temperature (°C) 80 95 0.5 −40 −25 −10 110 125 0.50 1.3 0.45 1.2 0.40 0.35 0.30 0.25 0.20 0.15 0.10 20 35 50 65 Temperature (°C) 80 95 110 125 1.1 1.0 0.9 0.8 0.7 0.6 0.5 0.05 Internal reference enabled, Gain = 1 0 0.4 8192 16384 24576 32768 40960 49152 57344 65536 Digital Input Code 0 8192 16384 24576 32768 40960 49152 57344 65536 Digital Input Code Figure 52. Power-Supply Current vs Digital Input Code 30 30 25 25 20 20 Population (%) Figure 51. Power-Supply Current vs Digital Input Code 15 10 10 0.40 0.38 0.36 0.34 0.32 0.30 0.28 0.26 0.24 0.22 0.20 0.18 0 0.16 0 0.14 5 0.12 Internal reference enabled Gain = 1 15 5 0.10 Population (%) 5 Figure 50. Power-Supply Current vs Temperature Power−Supply Current (mA) Power−Supply Current (mA) Figure 49. Power-Supply Current vs Temperature 0.00 Internal reference enabled DACs at midscale code, Gain = 1 DACs at midscale code 0.30 0.35 0.40 0.45 0.50 0.55 0.60 0.65 0.70 0.75 0.80 0.85 0.90 0.95 1.00 1.05 1.10 1.15 1.20 1.25 1.30 Power−Supply Current (mA) At TA = 25°C, 3.3-V external reference used, gain = 1 and DAC output not loaded, unless otherwise noted. Power Supply Current (mA) Power Supply Current (mA) Figure 53. Power-Supply Current Histogram Figure 54. Power-Supply Current Histogram Copyright © 2015, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Links: DAC7562T DAC7563T DAC8162T DAC8163T DAC8562T DAC8563T 21 DAC7562T, DAC7563T, DAC8162T DAC8163T, DAC8562T, DAC8563T SLASE61A – SEPTEMBER 2015 – REVISED OCTOBER 2015 www.ti.com 7.7.4 Typical Characteristics: DAC at AVDD = 2.7 V At TA = 25°C, 2.5-V external reference used, gain = 1, and DAC output not loaded, unless otherwise noted. 12 1.0 9 0.8 0.6 DNL Error (LSB) INL Error (LSB) 6 3 0 −3 0.4 0.2 0.0 −0.2 −0.4 −6 −0.6 −9 −12 Typical channel shown −40°C 0 Typical channel shown −40°C −0.8 −1.0 8192 16384 24576 32768 40960 49152 57344 65536 Digital Input Code Figure 55. Linearity Error vs Digital Input Code (–40°C) 0 8192 16384 24576 32768 40960 49152 57344 65536 Digital Input Code Figure 56. Differential Linearity Error vs Digital Input Code (–40°C) 12 1.0 9 0.8 0.6 DNL Error (LSB) INL Error (LSB) 6 3 0 −3 0.4 0.2 0.0 −0.2 −0.4 −6 −0.6 −9 −12 Typical channel shown 25°C 0 Typical channel shown 25°C −0.8 −1.0 8192 16384 24576 32768 40960 49152 57344 65536 Digital Input Code Figure 57. Linearity Error vs Digital Input Code (25°C) 0 8192 16384 24576 32768 40960 49152 57344 65536 Digital Input Code Figure 58. Differential Linearity Error vs Digital Input Code (25°C) 12 1.0 9 0.8 0.6 DNL Error (LSB) INL Error (LSB) 6 3 0 −3 0.4 0.2 0.0 −0.2 −0.4 −6 −0.6 −9 −12 Typical channel shown 125°C 0 8192 16384 24576 32768 40960 49152 57344 65536 Digital Input Code Figure 59. Linearity Error vs Digital Input Code (125°C) 22 Submit Documentation Feedback Typical channel shown 125°C −0.8 −1.0 0 8192 16384 24576 32768 40960 49152 57344 65536 Digital Input Code Figure 60. Differential Linearity Error vs Digital Input Code (125°C) Copyright © 2015, Texas Instruments Incorporated Product Folder Links: DAC7562T DAC7563T DAC8162T DAC8163T DAC8562T DAC8563T DAC7562T, DAC7563T, DAC8162T DAC8163T, DAC8562T, DAC8563T www.ti.com SLASE61A – SEPTEMBER 2015 – REVISED OCTOBER 2015 Typical Characteristics: DAC at AVDD = 2.7 V (continued) At TA = 25°C, 2.5-V external reference used, gain = 1, and DAC output not loaded, unless otherwise noted. 12 1.0 INL Max INL Min 9 DNL Max DNL Min 0.8 0.6 DNL Error (LSB) INL Error (LSB) 6 3 0 −3 0.4 0.2 0.0 −0.2 −0.4 −6 −0.6 −9 Typical channel shown −12 −40 −25 −10 5 20 35 50 65 Temperature (°C) −0.8 80 95 Typical channel shown −1.0 −40 −25 −10 5 20 35 50 65 Temperature (°C) 110 125 Figure 61. Linearity Error vs Temperature 95 110 125 Figure 62. Differential Linearity Error vs Temperature 0.20 0.15 Ch A Ch B 0.15 Ch A Ch B 0.10 0.10 Gain Error (%FSR) Full−Scale Error (%FSR) 80 0.05 0.00 −0.05 0.05 0.00 −0.05 −0.10 −0.10 −0.15 −0.20 −40 −25 −10 5 20 35 50 65 Temperature (°C) 80 95 −0.15 −40 −25 −10 110 125 Figure 63. Full-Scale Error vs Temperature 20 35 50 65 Temperature (°C) 80 95 110 125 Figure 64. Gain Error vs Temperature 4 4.0 Ch A Ch B 3 1 0 −1 −2 −3 Ch A Ch B 3.5 Zero−Code Error (mV) 2 Offset Error (mV) 5 3.0 2.5 2.0 1.5 1.0 0.5 −4 −40 −25 −10 5 20 35 50 65 Temperature (°C) 80 95 Figure 65. Offset Error vs Temperature Copyright © 2015, Texas Instruments Incorporated 110 125 0.0 −40 −25 −10 5 20 35 50 65 Temperature (°C) 80 95 110 125 Figure 66. Zero-Code Error vs Temperature Submit Documentation Feedback Product Folder Links: DAC7562T DAC7563T DAC8162T DAC8163T DAC8562T DAC8563T 23 DAC7562T, DAC7563T, DAC8162T DAC8163T, DAC8562T, DAC8563T SLASE61A – SEPTEMBER 2015 – REVISED OCTOBER 2015 www.ti.com Typical Characteristics: DAC at AVDD = 2.7 V (continued) 0.40 1.3 0.35 1.2 Power−Supply Current (mA) Power−Supply Current (mA) At TA = 25°C, 2.5-V external reference used, gain = 1, and DAC output not loaded, unless otherwise noted. 0.30 0.25 0.20 0.15 0.10 0.05 1.1 1.0 0.9 0.8 0.7 0.6 Internal reference enabled DACs at midscale code, Gain = 1 DACs at midscale code 0.00 −40 −25 −10 5 20 35 50 65 Temperature (°C) 80 95 0.5 −40 −25 −10 110 125 0.40 1.3 0.35 1.2 0.30 0.25 0.20 0.15 0.10 20 35 50 65 Temperature (°C) 80 95 110 125 Figure 68. Power-Supply Current vs Temperature Power−Supply Current (mA) Power−Supply Current (mA) Figure 67. Power-Supply Current vs Temperature 5 0.05 1.1 1.0 0.9 0.8 0.7 0.6 0.5 Internal reference enabled, Gain = 1 24 0 0.4 8192 16384 24576 32768 40960 49152 57344 65536 Digital Input Code 0 8192 16384 24576 32768 40960 49152 57344 65536 Digital Input Code Figure 70. Power-Supply Current vs Digital Input Code 30 30 25 25 20 20 15 10 15 10 0.40 0.38 0.36 0.34 0.32 0.30 0.28 0.26 0.24 0.22 0.20 0 0.18 0 0.16 5 0.14 5 0.12 Internal reference enabled Gain = 1 0.30 0.35 0.40 0.45 0.50 0.55 0.60 0.65 0.70 0.75 0.80 0.85 0.90 0.95 1.00 1.05 1.10 1.15 1.20 1.25 1.30 Population (%) Figure 69. Power-Supply Current vs Digital Input Code 0.10 Population (%) 0.00 Power Supply Current (mA) Power Supply Current (mA) Figure 71. Power-Supply Current Histogram Figure 72. Power-Supply Current Histogram Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: DAC7562T DAC7563T DAC8162T DAC8163T DAC8562T DAC8563T DAC7562T, DAC7563T, DAC8162T DAC8163T, DAC8562T, DAC8563T www.ti.com SLASE61A – SEPTEMBER 2015 – REVISED OCTOBER 2015 Typical Characteristics: DAC at AVDD = 2.7 V (continued) At TA = 25°C, 2.5-V external reference used, gain = 1, and DAC output not loaded, unless otherwise noted. 3.0 4 Full scale Mid scale Zero scale 3 2.0 Output Voltage (V) Power−Down Current (µA) Typical channel shown 2.5 1.5 1.0 0.5 2 1 0 0.0 −40 −25 −10 5 20 35 50 65 Temperature (°C) 80 95 110 125 G073 −1 −20 −15 −10 −5 0 5 10 15 20 ILOAD (mA) Figure 73. Power-Down Current vs Temperature LDAC Trigger (5 V/div) Figure 74. DAC Output Voltage vs Load Current LDAC Trigger (5 V/div) Large Signal VOUT (1 V/div) Large Signal VOUT (1 V/div) Small Signal Settling (0.61 mV/div = 0.024% FSR) Small Signal Settling (0.61 mV/div = 0.024% FSR) From Code: FFFFh To Code: 0h From Code: 0h To Code: FFFFh Time (5 μs/div) Time (5 μs/div) Figure 75. Full-Scale Settling Time, Rising Edge LDAC Trigger (5 V/div) Figure 76. Full-Scale Settling Time, Falling Edge LDAC Trigger (5 V/div) Large Signal VOUT (1 V/div) Large Signal VOUT (1 V/div) Small Signal Settling (0.61 mV/div = 0.024% FSR) Small Signal Settling (0.61 mV/div = 0.024% FSR) From Code: 4000h To Code: C000h Time (5 μs/div) Figure 77. Half-Scale Settling Time, Rising Edge Copyright © 2015, Texas Instruments Incorporated From Code: C000h To Code: 4000h Time (5 μs/div) Figure 78. Half-Scale Settling Time, Falling Edge Submit Documentation Feedback Product Folder Links: DAC7562T DAC7563T DAC8162T DAC8163T DAC8562T DAC8563T 25 DAC7562T, DAC7563T, DAC8162T DAC8163T, DAC8562T, DAC8563T SLASE61A – SEPTEMBER 2015 – REVISED OCTOBER 2015 www.ti.com Typical Characteristics: DAC at AVDD = 2.7 V (continued) At TA = 25°C, 2.5-V external reference used, gain = 1, and DAC output not loaded, unless otherwise noted. LDAC Trigger (5 V/div) LDAC Trigger (5 V/div) LDAC Feedthrough Glitch Impulse » 0.1 nV-s VOUT (100 μV/div) VOUT (100 μV/div) LDAC Feedthrough Glitch Impulse » 0.1 nV-s From Code: 7FFFh To Code: 8000h From Code: 8000h To Code: 7FFFh Time (5 μs/div) Time (5 μs/div) Figure 79. Glitch Impulse, Rising Edge, 1-LSB Step Figure 80. Glitch Impulse, Falling Edge, 1-LSB Step LDAC Trigger (5 V/div) LDAC Trigger (5 V/div) Glitch Impulse » 0.1 nV-s LDAC Feedthrough VOUT (100 μV/div) VOUT (100 μV/div) LDAC Feedthrough Glitch Impulse » 0.1 nV-s From Code: 7FFCh To Code: 8000h From Code: 8000h To Code: 7FFCh Time (5 μs/div) Time (5 μs/div) Figure 81. Glitch Impulse, Rising Edge, 4-LSB Step Figure 82. Glitch Impulse, Falling Edge, 4-LSB Step LDAC Trigger (5 V/div) Glitch Impulse » 0.1 nV-s VOUT (200 μV/div) LDAC Trigger (5 V/div) LDAC Feedthrough LDAC Feedthrough VOUT (200 μV/div) Glitch Impulse » 0.1 nV-s From Code: 7FF0h To Code: 8000h Time (5 μs/div) Figure 83. Glitch Impulse, Rising Edge, 16-LSB Step 26 Submit Documentation Feedback From Code: 8000h To Code: 7FF0h Time (5 μs/div) Figure 84. Glitch Impulse, Falling Edge, 16-LSB Step Copyright © 2015, Texas Instruments Incorporated Product Folder Links: DAC7562T DAC7563T DAC8162T DAC8163T DAC8562T DAC8563T DAC7562T, DAC7563T, DAC8162T DAC8163T, DAC8562T, DAC8563T www.ti.com SLASE61A – SEPTEMBER 2015 – REVISED OCTOBER 2015 Typical Characteristics: DAC at AVDD = 2.7 V (continued) At TA = 25°C, 2.5-V external reference used, gain = 1, and DAC output not loaded, unless otherwise noted. AVDD (2 V/div) AVDD (2 V/div) VOUTA (500 mV/div) VOUTB (500 mV/div) VOUTA (50 mV/div) VOUTB (50 mV/div) VREFIN shorted to AVDD VREFIN shorted to AVDD Time (1 ms/div) Time (1 ms/div) Figure 85. Power-On Glitch, Reset to Zero Scale Figure 86. Power-On Glitch, Reset to Midscale SCLK (2 V/div) Clock Feedthrough Impulse » 0.02 nV-s VOUT (500 μV/div) Time (500 ns/div) Figure 87. Clock Feedthrough, 500 kHz, Midscale Copyright © 2015, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Links: DAC7562T DAC7563T DAC8162T DAC8163T DAC8562T DAC8563T 27 DAC7562T, DAC7563T, DAC8162T DAC8163T, DAC8562T, DAC8563T SLASE61A – SEPTEMBER 2015 – REVISED OCTOBER 2015 www.ti.com 8 Detailed Description 8.1 Overview The DAC756xT, DAC816xT, and DAC856xT devices are low-power, voltage-output, dual-channel, 16-, 14-, and 12-bit digital-to-analog converters (DACs), respectively. These devices include a 2.5-V, 4-ppm/°C internal reference, giving a full-scale output voltage range of 2.5 V or 5 V. The internal reference has an initial accuracy of ±5 mV and can source or sink up to 20 mA at the VREFIN/VREFOUT pin. 8.2 Functional Block Diagram GND DIN SCLK SYNC LDAC AVDD CLR Buffer Control VREFIN/VREFOUT Register Control 2.5-V Reference Input Control Logic Control Logic DAC756xT (12-Bit) DAC816xT (14-Bit) DAC856xT (16-Bit) PowerDown Control Logic Data Buffer B DAC Register B DAC VOUTB Data Buffer A DAC Register A DAC VOUTA 8.3 Feature Description 8.3.1 Digital-to-Analog Converter (DAC) The DAC756xT, DAC816xT, and DAC856xT architecture consists of two string DACs, each followed by an output buffer amplifier. The devices include an internal 2.5-V reference with 4-ppm/°C temperature drift performance. Figure 88 shows a principal block diagram of the DAC architecture. Gain Register DIN n DAC Register VREFIN/ VREFOUT 150 kW REF(+) Resistor String REF(-) 150 kW VOUT GND Figure 88. DAC Architecture The input coding to the DAC756xT, DAC816xT, and DAC856xT devices is straight binary, so the ideal output voltage is given by Equation 1: æD ö VO UT = ç IN ´ VREF ´ Gain n ÷ è 2 ø (1) where: n = resolution in bits; either 12 (DAC756xT), 14 (DAC816xT) or 16 (DAC856xT) DIN = decimal equivalent of the binary code that is loaded to the DAC register. DIN ranges from 0 to 2n – 1. VREF = DAC reference voltage; either VREFOUT from the internal 2.5-V reference or VREFIN from an aaa external reference. Gain = 1 by default when internal reference is disabled (using external reference), and gain = 2 by default aaa when using internal reference. Gain can also be manually set to either 1 or 2 using the gain register. aaa See the Gain Function section for more information. 28 Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: DAC7562T DAC7563T DAC8162T DAC8163T DAC8562T DAC8563T DAC7562T, DAC7563T, DAC8162T DAC8163T, DAC8562T, DAC8563T www.ti.com SLASE61A – SEPTEMBER 2015 – REVISED OCTOBER 2015 Feature Description (continued) 8.3.1.1 Resistor String The resistor string section is shown in Figure 89. It is simply a string of resistors, each of value R. The code loaded into the DAC register determines at which node on the string the voltage is tapped off to be fed into the output amplifier by closing one of the switches connecting the string to the amplifier. The resistor string architecture results in monotonicity. The RDIVIDER switch is controlled by the gain registers (see the Gain Function section). Because the output amplifier has a gain of 2, RDIVIDER is not shorted when the DAC-n gain is set to 1 (default if internal reference is disabled), and is shorted when the DAC-n gain is set to 2 (default if internal reference is enabled). VREFIN/VREFOUT RDIVIDER VREF 2 R R To Output Amplifier R R Figure 89. Resistor String 8.3.1.2 Output Amplifier The output buffer amplifier is capable of generating rail-to-rail voltages on its output, giving a maximum output range of 0 V to AVDD. It is capable of driving a load of 2 kΩ in parallel with 3 nF to GND. The typical slew rate is 0.75 V/µs, with a typical full-scale settling time of 14 µs as shown in Figure 31, Figure 32, Figure 75 and Figure 76. Copyright © 2015, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Links: DAC7562T DAC7563T DAC8162T DAC8163T DAC8562T DAC8563T 29 DAC7562T, DAC7563T, DAC8162T DAC8163T, DAC8562T, DAC8563T SLASE61A – SEPTEMBER 2015 – REVISED OCTOBER 2015 www.ti.com Feature Description (continued) 8.3.2 Internal Reference The DAC756xT, DAC816xT, and DAC856xT devices include a 2.5-V internal reference that is disabled by default. The internal reference is externally available at the VREFIN/VREFOUT pin. The internal reference output voltage is 2.5 V and can sink and source up to 20 mA. A minimum 150-nF capacitor is recommended between the reference output and GND for noise filtering. The internal reference of the DAC756xT, DAC816xT, and DAC856xT devices is a bipolar transistor-based precision band-gap voltage reference. Figure 90 shows the basic band-gap topology. Transistors Q1 and Q2 are biased such that the current density of Q1 is greater than that of Q2. The difference of the two base-emitter voltages (VBE1 – VBE2) has a positive temperature coefficient and is forced across resistor R1. This voltage is amplified and added to the base-emitter voltage of Q2, which has a negative temperature coefficient. The resulting output voltage is virtually independent of temperature. The short-circuit current is limited by design to approximately 100 mA. VREFIN/VREFOUT Reference Enable Q1 Q2 R1 R2 Figure 90. Band-Gap Reference Simplified Schematic 8.3.3 Power-On Reset 8.3.3.1 Power-On Reset to Zero-Scale The DAC7562T, DAC8162T, and DAC8562T devices contain a power-on-reset circuit that controls the output voltage during power up. All device registers are reset as shown in Table 4. At power up, all DAC registers are filled with zeros and the output voltages of all DAC channels are set to zero volts. Each DAC channel remains that way until a valid load command is written to it. The power-on reset is useful in applications where it is important to know the state of the output of each DAC while the device is in the process of powering up. No device pin should be brought high before applying power to the device. The internal reference is disabled by default and remains that way until a valid reference-change command is executed. 8.3.3.2 Power-On Reset to Mid-Scale The DAC7563T, DAC8163T, and DAC8563T devices contain a power-on reset circuit that controls the output voltage during power up. At power up, all DAC registers are reset to mid-scale code and the output voltages of all DAC channels are set to VREFIN / 2 volts. Each DAC channel remains that way until a valid load command is written to it. The power-on reset is useful in applications where it is important to know the state of the output of each DAC while the device is in the process of powering up. No device pin should be brought high before applying power to the device. The internal reference is powered off or down by default and remains that way until a valid reference-change command is executed. If using an external reference, it is acceptable to power on the VREFIN pin either at the same time as or after applying AVDD. 30 Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: DAC7562T DAC7563T DAC8162T DAC8163T DAC8562T DAC8563T DAC7562T, DAC7563T, DAC8162T DAC8163T, DAC8562T, DAC8563T www.ti.com SLASE61A – SEPTEMBER 2015 – REVISED OCTOBER 2015 Table 4. DACxx62T and DACxx63T Power-On Reset Values REGISTER DEFAULT SETTING DAC and input registers DACxx62T Zero-scale DACxx63T Mid-scale LDAC registers LDAC pin enabled for both channels Power-down registers DACs powered up Internal reference register Internal reference disabled Gain registers Gain = 1 for both channels 8.3.3.3 Power-On Reset (POR) Levels When the device powers up, a POR circuit sets the device in default mode as shown in Table 4. The POR circuit requires specific AVDD levels, as indicated in Figure 91, to ensure discharging of internal capacitors and to reset the device on power up. In order to ensure a power-on reset, AVDD must be below 0.7 V for at least 1 ms. When AVDD drops below 2.2 V but remains above 0.7 V (shown as the undefined region), the device may or may not reset under all specified temperature and power-supply conditions. In this case, TI recommends a power-on reset. When AVDD remains above 2.2 V, a power-on reset does not occur. AVDD (V) 5.50 No Power-On Reset Specified Supply Voltage Range 2.70 2.20 Undefined 0.70 Power-On Reset 0.00 Figure 91. Relevant Voltage Levels for POR Circuit Copyright © 2015, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Links: DAC7562T DAC7563T DAC8162T DAC8163T DAC8562T DAC8563T 31 DAC7562T, DAC7563T, DAC8162T DAC8163T, DAC8562T, DAC8563T SLASE61A – SEPTEMBER 2015 – REVISED OCTOBER 2015 www.ti.com 8.4 Device Functional Modes 8.4.1 Power-Down Modes The DAC756xT, DAC816xT, and DAC856xT devices have two separate sets of power-down commands. One set is for the DAC channels and the other set is for the internal reference. The internal reference is forced to a powered-down state while both DAC channels are powered down, and is only enabled if any DAC channel is also in the normal mode of operation. For more information on the internal reference control, see the Internal Reference Enable Register section. 8.4.1.1 DAC Power-Down Commands The DAC756xT, DAC816xT, and DAC856xT DACs use four modes of operation. These modes are accessed by setting the serial interface command bits to 100. Once the command bits are set correctly, the four different power-down modes are software programmable by setting bits DB5 and DB4 in the shift register. Table 5 and Table 6 show the different power-down options. For more information on how to set the DAC operating mode see Table 17. Table 5. DAC-n Operating Modes DB5 DB4 0 0 Selected DACs power up (normal mode, default) DAC Modes of Operation 0 1 Selected DACs power down, output 1 kΩ to GND 1 0 Selected DACs power down, output 100 kΩ to GND 1 1 Selected DACs power down, output Hi-Z to GND Table 6. DAC-n Selection for Operating Modes DAC-B (DB1), DAC-A (DB0) Operating Mode 0 DAC-n does not change operating mode 1 DAC-n operating mode set to value on PD1 and PD0 It is possible to write to the DAC register or buffer of the DAC channel that is powered down. When the DAC channel is then powered up, it powers up to this new value. The advantage of the available power-down modes is that the output impedance of the device is known while it is in power-down mode. As described in Table 5, there are three different power-down options. VOUT can be connected internally to GND through a 1-kΩ resistor, a 100-kΩ resistor, or open-circuited (Hi-Z). The DAC power-down circuitry is shown in Figure 92. Resistor String DAC Amplifier Power-Down Circuitry VOUTX Resistor Network Figure 92. Output Stage 32 Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: DAC7562T DAC7563T DAC8162T DAC8163T DAC8562T DAC8563T DAC7562T, DAC7563T, DAC8162T DAC8163T, DAC8562T, DAC8563T www.ti.com SLASE61A – SEPTEMBER 2015 – REVISED OCTOBER 2015 8.4.2 Gain Function The gain register controls the GAIN setting in the DAC transfer function: æD ö VO UT = ç IN ´ VREF ´ Gain n ÷ è 2 ø (2) The DAC756xT, DAC816xT, and DAC856xT devices have a gain register for each channel. The gain for each channel, in Equation 2, is either 1 or 2. This gain is automatically set to 2 when using the internal reference, and is automatically set to 1 when the internal reference is disabled (default). However, each channel can have either gain by setting the registers appropriately. The gain registers are accessible by setting the serial interface command bits to 000, address bits to 010, and using DB1 for DAC-B and DB0 for DAC-A. See Table 7 and Table 17 for the full command structure. The gain registers are automatically reset to provide either gain of 1 or 2 when the internal reference is powered off or on, respectively. After the reference is powered off or on, the gain register is again accessible to change the gain. Table 7. DAC-n Selection for Gain Register Command DB1, DB0 Value DB0 0 DAC-A uses gain = 2 (default with internal reference) 1 DAC-A uses gain = 1 (default with external reference) 0 DAC-B uses gain = 2 (default with internal reference) 1 DAC-B uses gain = 1 (default with external reference) DB1 Gain 8.4.3 Software Reset Function The DAC756xT, DAC816xT, and DAC856xT devices contain a software reset feature. The software reset function is accessed by setting the serial interface command bits to 101. The software reset command contains two reset modes which are software-programmable by setting bit DB0 in the shift register. Table 8 and Table 17 show the available software reset commands. Table 8. Software Reset DB0 Registers Reset to Default Values 0 DAC registers Input registers 1 DAC registers Input registers LDAC registers Power-down registers Internal reference register Gain registers Copyright © 2015, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Links: DAC7562T DAC7563T DAC8162T DAC8163T DAC8562T DAC8563T 33 DAC7562T, DAC7563T, DAC8162T DAC8163T, DAC8562T, DAC8563T SLASE61A – SEPTEMBER 2015 – REVISED OCTOBER 2015 www.ti.com 8.4.4 Internal Reference Enable Register The internal reference in the DAC756xT, DAC816xT, and DAC856xT devices is disabled by default for debugging, evaluation purposes, or when using an external reference. The internal reference can be powered up and powered down by setting the serial interface command bits to 111 and configuring DB0 (see Table 9). The internal reference is forced to a powered down state while both DAC channels are powered down, and can only be enabled if any DAC channel is in normal mode of operation. During the time that the internal reference is disabled, the DAC functions normally using an external reference. At this point, the internal reference is disconnected from the VREFIN/VREFOUT pin (Hi-Z output). Table 9. Internal Reference DB0 Internal Reference Configuration 0 Disable internal reference and reset DACs to gain = 1 1 Enable internal reference and reset DACs to gain = 2 8.4.4.1 Enabling Internal Reference To enable the internal reference, refer to the command structure in Table 17. When performing a power cycle to reset the device, the internal reference is switched off (default mode). In the default mode, the internal reference is powered down until a valid write sequence powers up the internal reference. However, the internal reference is forced to a disabled state while both DAC channels are powered down, and remains disabled until either DAC channel is returned to the normal mode of operation. See DAC Power-Down Commands for more information on DAC channel modes of operation. 8.4.4.2 Disabling Internal Reference To disable the internal reference, refer to the command structure in Table 17. When performing a power cycle to reset the device, the internal reference is disabled (default mode). 8.4.5 CLR Functionality The edge-triggered CLR pin can be used to set the input and DAC registers immediately according to Table 10. When the CLR pin receives a falling edge signal the clear mode is activated and changes the DAC output voltages accordingly. The device exits clear mode on the 24th falling edge of the next write to the device. If the CLR pin receives a falling edge signal during a write sequence in normal operation, the clear mode is activated and changes the input and DAC registers immediately according to Table 10. Table 10. Clear Mode Reset Values 34 DEVICE DAC Output Entering Clear Mode DAC8562T, DAC8162T, DAC7562T Zero-scale DAC8563T, DAC8163T, DAC7563T Mid-scale Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: DAC7562T DAC7563T DAC8162T DAC8163T DAC8562T DAC8563T DAC7562T, DAC7563T, DAC8162T DAC8163T, DAC8562T, DAC8563T www.ti.com SLASE61A – SEPTEMBER 2015 – REVISED OCTOBER 2015 8.4.6 LDAC Functionality The DAC756xT, DAC816xT, and DAC856xT devices offer both a software and hardware simultaneous update and control function. The DAC double-buffered architecture has been designed so that new data can be entered for each DAC without disturbing the analog outputs. DAC756xT, DAC816xT, and DAC856xT data updates can be performed either in synchronous or in asynchronous mode. In asynchronous mode, the LDAC pin is used as a negative edge-triggered timing signal for simultaneous DAC updates. Multiple single-channel writes can be done in order to set different channel buffers to desired values and then make a falling edge on LDAC pin to simultaneously update the DAC output registers. Data buffers of all channels must be loaded with desired data before an LDAC falling edge. After a high-to-low LDAC transition, all DACs are simultaneously updated with the last contents of the corresponding data buffers. If the content of a data buffer is not changed, the corresponding DAC output remains unchanged after the LDAC pin is triggered. LDAC must be returned high before the next serial command is initiated. In synchronous mode, data are updated with the falling edge of the 24th SCLK cycle, which follows a falling edge of SYNC. For such synchronous updates, the LDAC pin is not required, and it must be connected to GND permanently or asserted and held low before sending commands to the device. Alternatively, all DAC outputs can be updated simultaneously using the built-in software function of LDAC. The LDAC register offers additional flexibility and control by allowing the selection of which DAC channel(s) should be updated simultaneously when the LDAC pin is being brought low. The LDAC register is loaded with a 2-bit word (DB1 and DB0) using command bits C2, C1, and C0 (see Table 17). The default value for each bit, and therefore for each DAC channel, is zero. If the LDAC register bit is set to 1, it overrides the LDAC pin (the LDAC pin is internally tied low for that particular DAC channel) and this DAC channel updates synchronously after the falling edge of the 24th SCLK cycle. However, if the LDAC register bit is set to 0, the DAC channel is controlled by the LDAC pin. The combination of software and hardware simultaneous update functions is particularly useful in applications when updating a DAC channel, while keeping the other channel unaffected; see Table 11 and Table 17 for more information. Table 11. DAC-n Selection for LDAC Register Command DB1, DB0 Value DB0 0 DAC-A uses LDAC pin 1 DAC-A operates in synchronous mode 0 DAC-B uses LDAC pin 1 DAC-B operates in synchronous mode DB1 Copyright © 2015, Texas Instruments Incorporated LDAC Pin Functionality Submit Documentation Feedback Product Folder Links: DAC7562T DAC7563T DAC8162T DAC8163T DAC8562T DAC8563T 35 DAC7562T, DAC7563T, DAC8162T DAC8163T, DAC8562T, DAC8563T SLASE61A – SEPTEMBER 2015 – REVISED OCTOBER 2015 www.ti.com 8.5 Programming The DAC756xT, DAC816xT, and DAC856xT devices have a three-wire serial interface (SYNC, SCLK, and DIN; see the table) compatible with SPI, QSPI, and Microwire interface standards, as well as most DSPs. See the Serial Write Operation timing diagram (Figure 1) for an example of a typical write sequence. The DAC756xT, DAC816xT, or DAC856xT input shift register is 24 bits wide, consisting of two don’t care bits (DB23 to DB22), three command bits (DB21 to DB19), three address bits (DB18 to DB16), and 16 data bits (DB15 to DB0). All 24 bits of data are loaded into the DAC under the control of the serial clock input, SCLK. DB23 (MSB) is the first bit that is loaded into the DAC shift register. DB23 is followed by the rest of the 24-bit word pattern, left-aligned. This configuration means that the first 24 bits of data are latched into the shift register, and any further clocking of data is ignored. The write sequence begins by bringing the SYNC line low. Data from the DIN line are clocked into the 24-bit shift register on each falling edge of SCLK. The serial clock frequency can be as high as 50 MHz, making the DAC756xT, DAC816xT, and DAC856xT devices compatible with high-speed DSPs. On the 24th falling edge of the serial clock, the last data bit is clocked into the shift register and the shift register locks. Further clocking does not change the shift register data. After receiving the 24th falling clock edge, the DAC756xT, DAC816xT, and DAC856xT devices decode the three command bits, three address bits and 16 data bits to perform the required function, without waiting for a SYNC rising edge. After the 24th falling edge of SCLK is received, the SYNC line may be kept low or brought high. In either case, the minimum delay time from the 24th falling SCLK edge to the next falling SYNC edge must be met in order to begin the next cycle properly; see the Serial Write Operation timing diagram (Figure 1). A rising edge of SYNC before the 24-bit sequence is complete resets the SPI interface; no data transfer occurs. A new write sequence starts at the next falling edge of SYNC. To assure the lowest power consumption of the device, care should be taken that the levels are as close to each rail as possible. 8.5.1 SYNC Interrupt In a normal write sequence, the SYNC line stays low for at least 24 falling edges of SCLK and the addressed DAC register updates on the 24th falling edge. However, if SYNC is brought high before the 23rd falling edge, it acts as an interrupt to the write sequence; the shift register resets and the write sequence is discarded. Neither an update of the data buffer contents, DAC register contents, nor a change in the operating mode occurs (as shown in Figure 93). 24th Falling Edge 24th Falling Edge CLK SYNC DIN DB23 DB23 DB0 Invalid/Interrupted Write Sequence: Output/Mode Does Not Update on the Falling Edge DB0 Valid Write Sequence: Output/Mode Updates on the Falling Edge Figure 93. SYNC Interrupt Facility 36 Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: DAC7562T DAC7563T DAC8162T DAC8163T DAC8562T DAC8563T DAC7562T, DAC7563T, DAC8162T DAC8163T, DAC8562T, DAC8563T www.ti.com SLASE61A – SEPTEMBER 2015 – REVISED OCTOBER 2015 Programming (continued) 8.5.2 DAC Register Configuration When the DAC registers are being written to, the DAC756xT, DAC816xT, and DAC856xT devices receive all 24 bits of data, ignore DB23 and DB22, and decode the next three bits (DB21 to DB19) in order to determine the DAC operating or control mode (see Table 12). Bits DB18 to DB16 are used to address the DAC channels (see Table 13). Table 12. Commands for the DAC756xT, DAC816xT, and DAC856xT Devices C2 (DB21) C1 (DB20) C0 (DB19) 0 0 0 Write to input register n (Table 13) 0 0 1 Software LDAC, update DAC register n (Table 13) 0 1 0 Write to input register n (Table 13) and update all DAC registers 0 1 1 Write to input register n and update DAC register n (Table 13) 1 0 0 Set DAC power up or -down mode 1 0 1 Software reset 1 1 0 Set LDAC registers 1 1 1 Enable or disable the internal reference Command Table 13. Address Select for the DAC756xT, DAC816xT, and DAC856xT Devices A2 (DB18) A1 (DB17) A0 (DB16) 0 0 0 DAC-A 0 0 1 DAC-B 0 1 0 Gain (only use with command 000) 0 1 1 Reserved 1 0 0 Reserved 1 0 1 Reserved 1 1 0 Reserved 1 1 1 DAC-A and DAC-B Channel (n) When writing to the DAC input registers the next 16, 14, or 12 bits of data that follow are decoded by the DAC to determine the equivalent analog output (see Table 14 through Table 16) . The data format is straight binary, with all 0s corresponding to 0-V output and all 1s corresponding to full-scale output. For all documentation purposes, the data format and representation used here is a true 16-bit pattern (that is, FFFFh data word for full scale) that the DAC756xT, DAC816xT, and DAC856xT devices require. Table 14. DAC856xT Data Input Register Format X (1) X DB23 (1) COMMAND C2 C1 C0 ADDRESS A2 A1 A0 D15 D14 D13 D12 D11 D10 D9 DATA D8 D7 D6 D5 D4 D3 D2 D1 D0 DB0 D3 D2 D1 D0 X X DB0 D1 D0 X X X X DB0 X' denotes don't care bits. Table 15. DAC816xT Data Input Register Format X X DB23 COMMAND C2 C1 C0 ADDRESS A2 A1 A0 COMMAND C2 C1 C0 ADDRESS A2 A1 A0 D13 D12 D11 D10 D9 D8 DATA D7 D6 D5 D4 Table 16. DAC756xT Data Input Register Format X X DB23 Copyright © 2015, Texas Instruments Incorporated D11 D10 D9 D8 D7 DATA D6 D5 D4 D3 D2 Submit Documentation Feedback Product Folder Links: DAC7562T DAC7563T DAC8162T DAC8163T DAC8562T DAC8563T 37 DAC7562T, DAC7563T, DAC8162T DAC8163T, DAC8562T, DAC8563T SLASE61A – SEPTEMBER 2015 – REVISED OCTOBER 2015 www.ti.com In additon to DAC input register updates, the DAC756xT, DAC816xT, and DAC856xT devices support a number of functional mode commands (such as write to LDAC register, power down DACs and so on). The complete set of functional mode commands is shown in Table 17. Table 17. Command Matrix for the DAC756xT, DAC816xT, and DAC856xT Devices Command Address DB23DB22 C2 C1 C0 X (1) 0 0 0 X X X X X X X X X X X (1) 38 0 0 0 0 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 1 1 0 1 1 0 Data DB15DB6 A0 0 0 0 16-, 14-, or 12-bit DAC data Write to DAC-A input register 0 0 1 16-, 14-, or 12-bit DAC data Write to DAC-B input register 1 1 1 16-, 14-, or 12-bit DAC data Write to DAC-A and DAC-B input registers 0 0 0 16-, 14-, or 12-bit DAC data Write to DAC-A input register and update all DACs 0 0 1 16-, 14-, or 12-bit DAC data Write to DAC-B input register and update all DACs 1 1 1 16-, 14-, or 12-bit DAC data Write to DAC-A and DAC-B input register and update all DACs 0 0 0 16-, 14-, or 12-bit DAC data Write to DAC-A input register and update DAC-A 0 0 1 16-, 14-, or 12-bit DAC data Write to DAC-B input register and update DAC-B 1 1 1 16-, 14-, or 12-bit DAC data Write to DAC-A and DAC-B input register and update all DACs 0 0 0 X Update DAC-A 0 0 1 X Update DAC-B 1 1 1 X 0 0 0 0 1 0 1 1 X X X X X X X 0 DB4 DESCRIPTION A1 0 DB5 DB3DB2 A2 DB1 DB0 Update all DACs 0 0 Gain: DAC-B gain = 2, DAC-A gain = 2 (default with internal VREF) 0 1 Gain: DAC-B gain = 2, DAC-A gain = 1 1 0 Gain: DAC-B gain = 1, DAC-A gain = 2 1 1 Gain: DAC-B gain = 1, DAC-A gain = 1 (power-on default) 0 1 Power up DAC-A 1 0 Power up DAC-B 1 1 Power up DAC-A and DAC-B 0 1 Power down DAC-A; 1 kΩ to GND 1 0 Power down DAC-B; 1 kΩ to GND 1 1 Power down DAC-A and DAC-B; 1 kΩ to GND 0 1 Power down DAC-A; 100 kΩ to GND 1 0 Power down DAC-B; 100 kΩ to GND 1 1 Power down DAC-A and DAC-B; 100 kΩ to GND 0 1 Power down DAC-A; Hi-Z 1 0 Power down DAC-B; Hi-Z 1 1 Power down DAC-A and DAC-B; Hi-Z X 0 Reset DAC-A and DAC-B input register and update all DACs X 1 Reset all registers and update all DACs (Power-on-reset update) 0 0 LDAC pin active for DAC-B and DAC-A 0 1 LDAC pin active for DAC-B; inactive for DAC-A 1 0 LDAC pin inactive for DAC-B; active for DAC-A 1 1 LDAC pin inactive for DAC-B and DAC-A X 0 Disable internal reference and reset DACs to gain = 1 X 1 Enable internal reference and reset DACs to gain = 2 X X X X X 0 0 0 1 1 0 1 1 X X X X X X X X denotes don't care bits. Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: DAC7562T DAC7563T DAC8162T DAC8163T DAC8562T DAC8563T DAC7562T, DAC7563T, DAC8162T DAC8163T, DAC8562T, DAC8563T www.ti.com SLASE61A – SEPTEMBER 2015 – REVISED OCTOBER 2015 9 Application and Implementation NOTE Information in the following applications sections is not part of the TI component specification, and TI does not warrant its accuracy or completeness. TI’s customers are responsible for determining suitability of components for their purposes. Customers should validate and test their design implementation to confirm system functionality. 9.1 Application Information 9.1.1 DAC Internal Reference The internal reference of the DAC756xT, DAC816xT, and DAC856xT devices does not require an external load capacitor for stability because it is stable without any capacitive load. However, for improved noise performance, an external load capacitor of 150 nF or larger connected to the VREFIN/VREFOUT output is recommended. Figure 94 shows the typical connections required for operation of the DAC756xT, DAC816xT, and DAC856xT internal reference. A supply bypass capacitor at the AVDD input is also recommended. DSC DGS 150 nF 1 VOUTA VREFIN/ 10 VREFOUT 2 VOUTB AVDD 9 3 GND DIN 8 7 4 LDAC SCLK 7 6 5 CLR SYNC 6 1 VOUTA VREFIN/VREFOUT 10 2 VOUTB AVDD 9 3 GND DIN 8 4 LDAC SCLK 5 CLR SYNC AVDD 1 mF 150 nF AVDD 1 mF Figure 94. Typical Connections for Operating the DAC756xT, DAC816xT, and DAC856xT Internal Reference 9.1.1.1 Supply Voltage The internal reference features an extremely low dropout voltage. It can be operated with a supply of only 5 mV above the reference output voltage in an unloaded condition. For loaded conditions, see the Load Regulation section. The stability of the internal reference with variations in supply voltage (line regulation, dc PSRR) is also exceptional. Within the specified supply voltage range of 2.7 V to 5.5 V, the variation at VREFIN/VREFOUT is typically 50 μV/V; see Figure 7. 9.1.1.2 Temperature Drift The internal reference is designed to exhibit minimal drift error, defined as the change in reference output voltage over varying temperature. The drift is calculated using the box method described by Equation 3: æ VREF _ MAX - VREF _ MIN ö 6 Drift Error = çç ÷÷ ´ 10 (ppm / °C ) ´ V T REF RANGE è ø (3) where: VREF_MAX = maximum reference voltage observed within temperature range TRANGE. VREF_MIN = minimum reference voltage observed within temperature range TRANGE. VREF = 2.5 V, target value for reference output voltage. TRANGE = the characterized range from –40°C to 125°C (165°C range) The internal reference features an exceptional typical drift coefficient of 4 ppm/°C from –40°C to 125°C. Characterizing a large number of units, a maximum drift coefficient of 10 ppm/°C is observed. Temperature drift results are summarized in Figure 3. Copyright © 2015, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Links: DAC7562T DAC7563T DAC8162T DAC8163T DAC8562T DAC8563T 39 DAC7562T, DAC7563T, DAC8162T DAC8163T, DAC8562T, DAC8563T SLASE61A – SEPTEMBER 2015 – REVISED OCTOBER 2015 www.ti.com Application Information (continued) 9.1.1.3 Noise Performance Typical 0.1-Hz to 10-Hz voltage noise and noise spectral density performance are listed in the Electrical Characteristics. Additional filtering can be used to improve output noise levels, although care should be taken to ensure the output impedance does not degrade the ac performance. The output noise spectrum at the VREFIN/VREFOUT pin, both unloaded and with an external 4.7-µF load capacitor, is shown in Figure 6. Internal reference noise impacts the DAC output noise when the internal reference is used. 9.1.1.4 Load Regulation Load regulation is defined as the change in reference output voltage as a result of changes in load current. The load regulation of the internal reference is measured using force and sense contacts as shown in Figure 95. The force and sense lines reduce the impact of contact and trace resistance, resulting in accurate measurement of the load regulation contributed solely by the internal reference. Measurement results are shown in Figure 4. Force and sense lines should be used for applications that require improved load regulation. Output Pin Contact and Trace Resistance VOUT Force Line IL Sense Line Meter Load Figure 95. Accurate Load Regulation of the DAC756xT, DAC816xT, and DAC856xT Internal Reference 9.1.1.4.1 Long-Term Stability Long-term stability or aging refers to the change of the output voltage of a reference over a period of months or years. This effect lessens as time progresses. The typical drift value for the internal reference is listed in the Electrical Charateristics and measurement results are shown in Figure 5. This parameter is characterized by powering up multiple devices and measuring them at regular intervals. 9.1.1.5 Thermal Hysteresis Thermal hysteresis for a reference is defined as the change in output voltage after operating the device at 25°C, cycling the device through the operating temperature range, and returning to 25°C. Hysteresis is expressed by Equation 4: é VREF_PRE - VREF_POST ù 6 VHYST = ê ú ´ 10 (ppm/°C) V REF_NOM ëê ûú (4) where: VHYST = thermal hysteresis. VREF_PRE = output voltage measured at 25°C pre-temperature cycling. VREF_POST = output voltage measured after the device cycles through the temperature range of –40°C to aaa 125°C, and returns to 25°C. VREF_NOM = 2.5 V, target value for reference output voltage. 9.1.2 DAC Noise Performance Output noise spectral density at the VOUT-n pin versus frequency is depicted in Figure 45 and Figure 46 for fullscale, mid-scale, and zero-scale input codes. The typical noise density for mid-scale code is 90 nV/√Hz at 1 kHz. High-frequency noise can be improved by filtering the reference noise. Integrated output noise between 0.1 Hz and 10 Hz is close to 2.5 µVPP (mid-scale), as shown in Figure 47. 40 Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: DAC7562T DAC7563T DAC8162T DAC8163T DAC8562T DAC8563T DAC7562T, DAC7563T, DAC8162T DAC8163T, DAC8562T, DAC8563T www.ti.com SLASE61A – SEPTEMBER 2015 – REVISED OCTOBER 2015 9.2 Typical Applications 9.2.1 Combined Voltage and Current Analog Output Module Using the XTR300 The design features two independent outputs that can source and sink voltage and current over the standard industrial output ranges. The possible outputs of the design include: –24 mA to 24 mA, 4 mA–20 mA, 0 mA to 24 mA, 0 V to 5 V, 0 V to 10 V, –5 V to5 V, and –10 V to 10 V. VREF R SET CCOMP 5.5 V 15 V 0.1 µF –15 V 0.1 µF 0.1 µF 4.7 µF RIMON AVDD LDAC SCLK VDAC DAC8563T DIN XTR300 IMON V+ V– Current Copy ICOPY RIN IDRV DRV VIN VOUTA OPA SET SYNC VOUTB GND + CH2 VREFIN/ VREFOUT VREF RIA IAOUT IIA IA IAIN+ RG1 RG2 V or I OUTA 0 V to 5 V, 0 V to 10 V, –5 to 5 V, –10 V to 10 V, –24 mA to 24 mA, 0 mA to 24 mA, 4mA to 20 mA RG GND DGND IAIN– 0.022 µF Figure 96. DAC8563T and XTR300 Discrete Analog Output Module 9.2.1.1 Design Requirements The design uses a DAC and a current-or-voltage output driver to create a discrete analog output design that can output either voltage or current from the same pin while focusing on high-accuracy specifications. The choice of the DAC8563T device takes advantage of its 16-bit resolution as well as its low typical offset error of 1 mV and gain error of 0.01% FSR. The choice of the XTR300 device is based on its strong dc performance, having a typical error of 400 µV and 0.04% FSR gain error. The XTR300 device allows a variety of both current and voltage outputs on the same pin while providing load monitoring and error status pins. The power-on reset-to-midscale feature of the DAC8563T makes the bipolar output of the XTR300 power up at 0 V or 0 A. If using a unipolar output, the recommended device to achieve a system power-on output of 0 V, 0 A or 4 mA is the DAC8562T device. A recommendation for minimizing the introduction of errors into the system is to use ±0.01% tolerance RG and RSET resistors. The bypass capacitors on AVDD, VREF, V+ and V– should have values between 100 nF and 10 µF. Smaller capacitors filter fast low-energy transients, whereas the large capacitors filter the slow highenergy transients. If there is an expectation of both types of signals in the system, the recommendation is to use a pair of small and large values as shown on the AVDD pin of the DAC8563T device in Figure 96. 9.2.1.2 Detailed Design Procedure When configured for voltage mode, the output of the instrumentation amplifier (IA), internal to the XTR300 device, is routed to the SET pin. The SET output provides feedback for the IA based on the IA input voltage. The feedback from the IA provides high-impedance remote sensing of the voltage at the output load. Using the output voltage can overcome errors from PCB traces and protection component impedances. The DAC provides a unipolar input voltage to the VIN pin of the XTR300 device. The XTR300 device offsets the VDAC range by a negative VREF and amplifies the difference by a value set by the RG and RSET resistors, as shown in Equation 5. Copyright © 2015, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Links: DAC7562T DAC7563T DAC8162T DAC8163T DAC8562T DAC8563T 41 DAC7562T, DAC7563T, DAC8162T DAC8163T, DAC8562T, DAC8563T SLASE61A – SEPTEMBER 2015 – REVISED OCTOBER 2015 www.ti.com Typical Applications (continued) VOUT = æ VDAC - VREF ´ç 2 çè R SET RG ö ÷ ÷ ø (5) When configured for current mode, the XTR300 routes the internal output of its current copy circuitry to the SET pin. This provides feedback for the internal OPA driver based on 1 / 10th of the output current, resulting in a voltage-to-current transfer function. Generating bipolar current outputs from the single-ended DAC output voltage, VDAC, requires the application of an offset to the XTR300 SET pin. Connect the RSET resistor from the SET pin to VREF to apply the offset and obtain the transfer function shown in Equation 6. æ VDAC - VREF ö ÷ I OUT = 10 ´ ç ç ÷ R SET è ø (6) The desired output ranges for VDAC and VREF voltages determine the RSET and RG resistor values, calculated using Equation 7 and Equation 8. The system design requires a VDAC voltage range of 0.04 V to 4.96 V in order to operate the DAC8563T in the specified linear output range from codes 512 to 65 024. æ V DAC - VREF ö æ 4.96 V - 2.5 V ö ÷ = 10 ´ ç RSET = 10 ´ ç ÷ = 1025 Ω ç ÷ I OUT 0.024 A è ø è ø (7) 2 ´ VOUT_MAX ´ R SET 2 ´ 10 V ´ 1020 Ω RG = = = 8292 Ω VDAC - VREF 4.96 V - 2.5 V (8) IMON and IAOUT accomplish load monitoring. The sizing of RIMON and RIA determine the monitoring output voltage across the resistors. Size the resistors according to Equation 9 and Equation 10 and the expected output load current IDRV. 10 ´ VIMON R IMON = IDRV (9) R IA = 10 ´ VIA IIA (10) For more detailed information about the design procedure of this circuit and how to isolate it, see Two-Channel Source/Sink Combined Voltage & Current Output, Isolated, EMC/EMI Tested Reference Design (TIDU434). 42 Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: DAC7562T DAC7563T DAC8162T DAC8163T DAC8562T DAC8563T DAC7562T, DAC7563T, DAC8162T DAC8163T, DAC8562T, DAC8563T www.ti.com SLASE61A – SEPTEMBER 2015 – REVISED OCTOBER 2015 Typical Applications (continued) 9.2.1.3 Application Curves Figure 97 shows the transfer function for the bipolar ±10 V voltage range. This design also supports output voltage ranges of 0–5 V, 0–10 V and ±5 V. Figure 98 shows the transfer function for the unipolar 0–24 mA current range. This design also supports output current ranges of ±24 mA and 4 mA–20 mA. 10 24 8 20 16 Output Current (mA ) Output Voltage (V ) 6 4 2 0 -2 -4 -6 12 8 4 0 -4 -8 -12 -16 -8 -20 -24 -10 0 10k 20k 30k 40k Input Code 50k 60k65535 Figure 97. Output Voltage vs Input Code Copyright © 2015, Texas Instruments Incorporated D001 0 10k 20k 30k 40k Input Code 50k 60k65535 D002 Figure 98. Output Current vs Input Code Submit Documentation Feedback Product Folder Links: DAC7562T DAC7563T DAC8162T DAC8163T DAC8562T DAC8563T 43 DAC7562T, DAC7563T, DAC8162T DAC8163T, DAC8562T, DAC8563T SLASE61A – SEPTEMBER 2015 – REVISED OCTOBER 2015 www.ti.com Typical Applications (continued) 9.2.2 Up to ±15-V Bipolar Output Using the DAC8562T The DAC8562T is designed to be operate from a single power supply providing a maximum output range of AVDD volts. However, the DAC can be placed in the configuration shown in Figure 99 in order to be designed into bipolar systems. Depending on the ratio of the resistor values, the output of the circuit can range anywhere from ±5 V to ±15 V. The design example below shows that the DAC is configured to have its internal reference enabled and the DAC8562T internal gain set to 2, however, an external 2.5-V reference could also be used (with DAC8562T internal gain set to 2). R G´R 5.5 V VREFOUT 18 V R + DAC8562T VOUT – OPA140 G´R –18 V Figure 99. Bipolar Output Range Circuit Using DAC8562T The transfer function shown in Equation 11 can be used to calculate the output voltage as a function of the DAC code, reference voltage and resistor ratio: DIN æ ö - 1÷ VOUT = G × VREFOUT ç 2 × 65,536 ø è (11) where: DIN = decimal equivalent of the binary code that is loaded to the DAC register, ranging from 0 to 65,535 for DAC8562T (16 bit). VREFOUT = reference output voltage with the internal reference enabled from the DAC VREFIN/VREFOUT pin G = ratio of the resistors An example configuration to generate a ±10-V output range is shown below in Equation 6 with G = 4 and VREFOUT = 2.5 V: DIN VOUT = 20 × - 10 V 65,536 (12) In this example, the range is set to ±10 V by using a resistor ratio of four, VREFOUT of 2.5 V, and DAC8562T internal gain of 2. The resistor sizes must be selected keeping in mind the current sink or source capability of the DAC8562T internal reference. Using larger resistor values, for example, R = 10 kΩ or larger, is recommended. The operational amplifier is selectable depending on the requirements of the system. The DAC8562TEVM and DAC7562TEVM boards have the option to evaluate the bipolar output application by installing the components on the pre-placed footprints. For more information see either the DAC8562EVM or DAC7562EVM product folder. 44 Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: DAC7562T DAC7563T DAC8162T DAC8163T DAC8562T DAC8563T DAC7562T, DAC7563T, DAC8162T DAC8163T, DAC8562T, DAC8563T www.ti.com SLASE61A – SEPTEMBER 2015 – REVISED OCTOBER 2015 9.3 System Examples 9.3.1 MSP430 Microprocessor Interfacing Figure 100 shows a serial interface between the DAC756xT, DAC816xT, or DAC856xT device and a typical MSP430 USI port such as the one found on the MSP430F2013. The port is configured in SPI master mode by setting bits 3, 5, 6, and 7 in USICTL0. The USI counter interrupt is set in USICTL1 to provide an efficient means of SPI communication with minimal software overhead. The serial clock polarity, source, and speed are controlled by settings in the USI clock control register (USICKCTL). The SYNC signal is derived from a bitprogrammable pin on port 1; in this case, port line P1.4 is used. When data are to be transmitted to the DAC756xT, DAC816xT, or DAC856xT device, P1.4 is taken low. The USI transmits data in 8-bit bytes; thus, only eight falling clock edges occur in the transmit cycle. To load data to the DAC, P1.4 is left low after the first eight bits are transmitted; then, a second write cycle is initiated to transmit the second byte of data. P1.4 is taken high following the completion of the third write cycle. MSP430F2013 DAC P1.4/GPIO SYNC P1.5/SCLK SCLK P1.6/SDO DIN NOTE: Additional pins omitted for clarity. Figure 100. DAC756xT, DAC816xT, or DAC856xT Device to MSP430 Interface 9.3.2 TMS320 McBSP Microprocessor Interfacing Figure 101 shows an interface between the DAC756xT, DAC816xT, or DAC856xT device and any TMS320 series DSP from Texas Instruments with a multi-channel buffered serial port (McBSP). Serial data are shifted out on the rising edge of the serial clock and are clocked into the DAC756xT, DAC816xT, or DAC856xT device on the falling edge of the SCLK signal. TMS320F28062 DAC MFSxA SYNC MCLKxA SCLK MDxA DIN NOTE: Additional pins omitted for clarity. Figure 101. DAC756xT, DAC816xT, or DAC856xT Device to TMS320 McBSP Interface 9.3.3 OMAP-L1x Processor Interfacing Figure 102 shows a serial interface between the DAC756xT, DAC816xT, or DAC856xT device and the OMAPL138 processor. The transmit clock CLKx0 of the L138 drives SCLK of the DAC756xT, DAC816xT, or DAC856xT device, and the data transmit (Dx0) output drives the serial data line of the DAC. The SYNC signal is derived from the frame sync transmit (FSx0) line, similar to the TMS320 interface. DAC OMAP-L138 FSx0 SYNC CLKx0 SCLK Dx0 DIN NOTE: Additional pins omitted for clarity. Figure 102. DAC756xT, DAC816xT, or DAC856xT Device to OMAP-L1x Processor Copyright © 2015, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Links: DAC7562T DAC7563T DAC8162T DAC8163T DAC8562T DAC8563T 45 DAC7562T, DAC7563T, DAC8162T DAC8163T, DAC8562T, DAC8563T SLASE61A – SEPTEMBER 2015 – REVISED OCTOBER 2015 www.ti.com 10 Power Supply Recommendations These devices can operate within the specified supply voltage range of 2.7 V to 5.5 V. The power applied to AVDD should be well-regulated and low-noise. In order to further minimize noise from the power supplies, a strong recommendation is to include a pair of 100-pF and 1-nF capacitors and a 0.1-μF to 1-μF bypass capacitor. The current consumption of the AVDD pin, the short-circuit current limit, and the load current for these devices are listed in the Electrical Characteristics table. Choose the power supplies for these devices to meet the aforementioned current requirements. 11 Layout 11.1 Layout Guidelines A precision analog component requires careful layout, adequate bypassing, and clean, well-regulated power supplies. The DAC756xT, DAC816xT, and DAC856xT devices offer single-supply operation, and are often used in close proximity with digital logic, microcontrollers, microprocessors, and digital signal processors. The more digital logic present in the design and the higher the switching speed, the more difficult it is to keep digital noise from appearing at the output. As a result of the single ground pin of the DAC756xT, DAC816xT, and DAC856xT devices, all return currents (including digital and analog return currents for the DAC) must flow through a single point. Ideally, GND would be connected directly to an analog ground plane. This plane would be separate from the ground connection for the digital components until they were connected at the power-entry point of the system. The power applied to AVDD should be well-regulated and low noise. Switching power supplies and dc-dc converters often have high-frequency glitches or spikes riding on the output voltage. In addition, digital components can create similar high-frequency spikes as their internal logic switches states. This noise can easily couple into the DAC output voltage through various paths between the power connections and analog output. As with the GND connection, AVDD should be connected to a power-supply plane or trace that is separate from the connection for digital logic until they are connected at the power-entry point. In addition, a pair of 100-pF to 1-nF capacitors and a 0.1-µF to 1-µF bypass capacitor are strongly recommended. In some situations, additional bypassing may be required, such as a 100-µF electrolytic capacitor or even a pi filter made up of inductors and capacitors – all designed essentially to provide low-pass filtering for the supply and remove the high-frequency noise. 46 Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: DAC7562T DAC7563T DAC8162T DAC8163T DAC8562T DAC8563T DAC7562T, DAC7563T, DAC8162T DAC8163T, DAC8562T, DAC8563T www.ti.com SLASE61A – SEPTEMBER 2015 – REVISED OCTOBER 2015 11.2 Layout Example 0.1 µF Bypass Capacitors 100 pF AVDD DIN Digital Lines VREFIN/VREFOUT SCLK SYNC GND VOUTA VOUTB Digital Lines Analog Lines LDAC CLK Figure 103. DACxx6xT Layout Example Copyright © 2015, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Links: DAC7562T DAC7563T DAC8162T DAC8163T DAC8562T DAC8563T 47 DAC7562T, DAC7563T, DAC8162T DAC8163T, DAC8562T, DAC8563T www.ti.com SLASE61A – SEPTEMBER 2015 – REVISED OCTOBER 2015 12 Device and Documentation Support 12.1 Related Links The table below lists quick access links. Categories include technical documents, support and community resources, tools and software, and quick access to sample or buy. Table 18. Related Links PARTS PRODUCT FOLDER SAMPLE & BUY TECHNICAL DOCUMENTS TOOLS & SOFTWARE SUPPORT & COMMUNITY DAC7562T Click here Click here Click here Click here Click here DAC7563T Click here Click here Click here Click here Click here DAC8162T Click here Click here Click here Click here Click here DAC8163T Click here Click here Click here Click here Click here DAC8562T Click here Click here Click here Click here Click here DAC8563T Click here Click here Click here Click here Click here 12.2 Community Resources The following links connect to TI community resources. Linked contents are provided "AS IS" by the respective contributors. They do not constitute TI specifications and do not necessarily reflect TI's views; see TI's Terms of Use. TI E2E™ Online Community TI's Engineer-to-Engineer (E2E) Community. Created to foster collaboration among engineers. At e2e.ti.com, you can ask questions, share knowledge, explore ideas and help solve problems with fellow engineers. Design Support TI's Design Support Quickly find helpful E2E forums along with design support tools and contact information for technical support. 12.3 Trademarks SPI, QSPI are trademarks of Motorola, Inc. All other trademarks are the property of their respective owners. 12.4 Electrostatic Discharge Caution This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with appropriate precautions. Failure to observe proper handling and installation procedures can cause damage. ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more susceptible to damage because very small parametric changes could cause the device not to meet its published specifications. 12.5 Glossary SLYZ022 — TI Glossary. This glossary lists and explains terms, acronyms, and definitions. 13 Mechanical, Packaging, and Orderable Information The following pages include mechanical, packaging, and orderable information. This information is the mostcurrent data available for the designated devices. This data is subject to change without notice and without revision of this document. For browser-based versions of this data sheet, see the left-hand navigation pane. Copyright © 2015, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Links: DAC7562T DAC7563T DAC8162T DAC8163T DAC8562T DAC8563T 49 PACKAGE OPTION ADDENDUM www.ti.com 10-Dec-2020 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Pins Package Drawing Qty Eco Plan (2) Lead finish/ Ball material MSL Peak Temp Op Temp (°C) Device Marking (3) (4/5) (6) DAC7562TDGSR ACTIVE VSSOP DGS 10 2500 RoHS & Green NIPDAU Level-2-260C-1 YEAR -40 to 125 75T2 DAC7562TDGST ACTIVE VSSOP DGS 10 250 RoHS & Green NIPDAU Level-2-260C-1 YEAR -40 to 125 75T2 DAC7562TDSCR ACTIVE WSON DSC 10 3000 RoHS & Green NIPDAU Level-2-260C-1 YEAR -40 to 125 7562T DAC7562TDSCT ACTIVE WSON DSC 10 250 RoHS & Green NIPDAU Level-2-260C-1 YEAR -40 to 125 7562T DAC7563TDGSR ACTIVE VSSOP DGS 10 2500 RoHS & Green NIPDAU Level-2-260C-1 YEAR -40 to 125 75T3 DAC7563TDGST ACTIVE VSSOP DGS 10 250 RoHS & Green NIPDAU Level-2-260C-1 YEAR -40 to 125 75T3 DAC7563TDSCR ACTIVE WSON DSC 10 3000 RoHS & Green NIPDAU Level-2-260C-1 YEAR -40 to 125 7563T DAC7563TDSCT ACTIVE WSON DSC 10 250 RoHS & Green NIPDAU Level-2-260C-1 YEAR -40 to 125 7563T DAC8162TDGSR ACTIVE VSSOP DGS 10 2500 RoHS & Green NIPDAU Level-2-260C-1 YEAR -40 to 125 81T2 DAC8162TDGST ACTIVE VSSOP DGS 10 250 RoHS & Green NIPDAU Level-2-260C-1 YEAR -40 to 125 81T2 DAC8162TDSCR ACTIVE WSON DSC 10 3000 RoHS & Green NIPDAU Level-2-260C-1 YEAR -40 to 125 8162T DAC8162TDSCT ACTIVE WSON DSC 10 250 RoHS & Green NIPDAU Level-2-260C-1 YEAR -40 to 125 8162T DAC8163TDGSR ACTIVE VSSOP DGS 10 2500 RoHS & Green NIPDAU Level-2-260C-1 YEAR -40 to 125 81T3 DAC8163TDGST ACTIVE VSSOP DGS 10 250 RoHS & Green NIPDAU Level-2-260C-1 YEAR -40 to 125 81T3 DAC8163TDSCR ACTIVE WSON DSC 10 3000 RoHS & Green NIPDAU Level-2-260C-1 YEAR -40 to 125 8163T DAC8163TDSCT ACTIVE WSON DSC 10 250 RoHS & Green NIPDAU Level-2-260C-1 YEAR -40 to 125 8163T DAC8562TDGSR ACTIVE VSSOP DGS 10 2500 RoHS & Green NIPDAU Level-2-260C-1 YEAR -40 to 125 85T2 DAC8562TDGST ACTIVE VSSOP DGS 10 250 RoHS & Green NIPDAU Level-2-260C-1 YEAR -40 to 125 85T2 DAC8562TDSCR ACTIVE WSON DSC 10 3000 RoHS & Green NIPDAU Level-2-260C-1 YEAR -40 to 125 8562T DAC8562TDSCT ACTIVE WSON DSC 10 250 RoHS & Green NIPDAU Level-2-260C-1 YEAR -40 to 125 8562T Addendum-Page 1 Samples PACKAGE OPTION ADDENDUM www.ti.com Orderable Device 10-Dec-2020 Status (1) Package Type Package Pins Package Drawing Qty Eco Plan (2) Lead finish/ Ball material MSL Peak Temp Op Temp (°C) Device Marking (3) (4/5) (6) DAC8563TDGSR ACTIVE VSSOP DGS 10 2500 RoHS & Green NIPDAU Level-2-260C-1 YEAR -40 to 125 85T3 DAC8563TDGST ACTIVE VSSOP DGS 10 250 RoHS & Green NIPDAU Level-2-260C-1 YEAR -40 to 125 85T3 DAC8563TDSCR ACTIVE WSON DSC 10 3000 RoHS & Green NIPDAU Level-2-260C-1 YEAR -40 to 125 8563T DAC8563TDSCT ACTIVE WSON DSC 10 250 RoHS & Green NIPDAU Level-2-260C-1 YEAR -40 to 125 8563T (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. PREVIEW: Device has been announced but is not in production. Samples may or may not be available. OBSOLETE: TI has discontinued the production of the device. (2) RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance do not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI may reference these types of products as "Pb-Free". RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption. Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of