AD5764BSU

Complete, Quad, 14/16-Bit, High Accuracy, Serial Input, Bipolar Voltage Output DAC iCMOSTM FEATURES Preliminary Technical Data AD5744/AD5764 GENERAL DESCRIPTION The AD5744/64 is a quad, 14/16-bit serial input, voltage output digital-to analog converter that operates from supply voltages of ±12 V up to ±15 V. Nominal full-scale output range is ±10 V, provided are integrated output amplifiers, reference buffers, internal reference, and proprietary power-up/power-down control circuitry. It also features a digital I/O port that may be programmed via the serial interface, and an analog temperature sensor. The part incorporates digital offset and gain adjust registers per channel. The AD5744/64 is a high performance converter that offers guaranteed monotonicity, integral nonlinearity (INL) of ±1 LSB, low noise and 10 µs settling time and includes an on-chip 5 V reference with a reference tempco of 10 ppm/°C max. During power-up (when the supply voltages are changing), Vout is clamped to 0V via a low impedance path. The AD5744/64 uses a serial interface that operates at clock rates of up to 30 MHz and is compatible with DSP and microcontroller interface standards. Double buffering allows the simultaneous updating of all DACs. The input coding is programmable to either twos complement or Offset binary formats. The asynchronous clear function clears all DAC registers to either bipolar zero or zero-scale depending on the coding used. The AD5744/64 is ideal for both closed-loop servo control and open-loop control applications. The AD5744/64 is available in a 32-lead TQFP package, and offers guaranteed specifications over the −40°C to +85°C industrial temperature range. See functional block diagram, Figure 1. Complete quad 14/16-bit D/A converter Programmable output range: ±10 V, ±10.25 V, or ±10.5 V ±1 LSB max INL error, ±1 LSB max DNL error Low noise : 60 nV/√Hz Settling time: 10µs max Integrated reference buffers Internal reference, 10 ppm/°C On-chip temp sensor, ±5°C accuracy Output control during power-up/brownout Programmable short-circuit protection Simultaneous updating via LDAC Asynchronous CLR to zero code Digital offset and gain adjust Logic output control pins DSP/microcontroller compatible serial interface Temperature range:−40°C to +85°C iCMOS™ Process Technology APPLICATIONS Industrial automation Open/Closed-loop servo control Process control Data acquisition systems Automatic Test Equipment Automotive test and measurement High accuracy instrumentation iCMOS™ Process Technology For analog systems designers within industrial/instrumentation equipment OEMs who need high performance ICs at higher-voltage levels, iCMOS is a technology platform that enables the development of analog ICs capable of 30V and operating at +/-15V supplies while allowing dramatic reductions in power consumption and package size, and increased AC and DC performance. Rev. PrA 15-Nov-04 Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.326.8703 © 2004 Analog Devices, Inc. All rights reserved. AD5744/AD5764 TABLE OF CONTENTS Functional Block Diagram .............................................................. 3 Specifications..................................................................................... 4 AC Performance Characteristics ................................................ 6 Timing Characteristics ................................................................ 7 Absolute Maximum Ratings.......................................................... 10 ESD Caution................................................................................ 10 Pin Configuration and Function Descriptions........................... 11 Terminology .................................................................................... 13 typical performance characteristics ............................................. 15 General Description ....................................................................... 16 dac architecture........................................................................... 16 Reference Buffers........................................................................ 16 Serial interface ............................................................................ 16 Simultaneous Updating Via LDAC .......................................... 17 transfer function ......................................................................... 18 Asynchronous Clear (CLR)....................................................... 18 Function Register ....................................................................... 19 DAta register ............................................................................... 20 Preliminary Technical Data Coarse gain register.................................................................... 20 Fine gain register ........................................................................ 21 offset register............................................................................... 21 AD5744/64 Features....................................................................... 22 Analog Output Control ............................................................. 22 Digital Offset and Gain Control............................................... 22 Programmable Short-Circuit protection................................. 22 Digital I/O Port........................................................................... 22 Temperature Sensor ................................................................... 22 Local ground offset adjust......................................................... 22 applications information ............................................................... 23 typical operating circuit............................................................. 23 layout guidelines......................................................................... 24 Isolated interface ........................................................................ 24 microprocessor interfacing ....................................................... 24 Evaluation board ........................................................................ 26 Outline Dimensions ....................................................................... 27 Ordering Guide .......................................................................... 27 REVISION HISTORY Revision PrA 15-Nov-04: Preliminary Version Rev. PrA 15-Nov-04| Page 2 of 27 Preliminary Technical Data FUNCTIONAL BLOCK DIAGRAM PGND AVDD AVSS AVDD AVSS REFOUT REFGND VREF AB VOLTAGE MONITOR AND CONTROL AD5744/AD5764 RSTOUT RSTIN DVCC DGND +5V REFERENCE REFERENCE BUFFERS ISCC 14/16 SDIN SCLK SYNC SDO INPUT SHIFT REGISTER AND CONTROL LOGIC INPUT REG A GAIN REG A OFFSET REG A DAC 14/16 REG A G1 DAC A G2 AGNDA VOUTA INPUT REG B GAIN REG B OFFSET REG B D0 D1 INPUT REG C GAIN REG C OFFSET REG C BIN/2SCOMP INPUT REG D DAC 14/16 REG B G1 DAC B G2 AGNDB VOUTB DAC 14/16 REG C G1 DAC C G2 AGNDC G1 DAC D G2 VOUTD VOUTC DAC 14/16 REG D CLR GAIN REG D OFFSET REG D REFERENCE BUFFERS TEMP SENSOR AGNDD LDAC VREF CD TEMP Figure 1. Functional Block Diagram Rev. PrA 15-Nov-04| Page 3 of 27 AD5744/AD5764 SPECIFICATIONS Preliminary Technical Data AVDD = +11.4 V to +16.5 V, AVSS = −11.4 V to −16.5 V, AGND = DGND = REFGND = PGND=0 V; REFAB = REFCD= 5 V Ext; DVCC = 2.7 V to 5.5 V, RLOAD = 10 kΩ, CL = 200 pF. All specifications TMIN to TMAX, unless otherwise noted. Table 1. Parameter ACCURACY Resolution Relative Accuracy (INL) Differential Nonlinearity Bipolar Zero Error A Grade1 16 14 ±4 ±1 ±1 B Grade1 16 14 ±2 ±1 ±1 C Grade1 16 14 ±1 ±1 ±1 Unit Bits LSB max LSB max mV max Test Conditions/Comments AD5764 AD5744 Guaranteed monotonic At 25°C. Error at other temperatures obtained using bipolar zero TC. At 25°C. Error at other temperatures obtained using zero code TC. At 25°C. Error at other temperatures obtained using gain TC. Bipolar Zero TC Zero Code Error ±2 ±1 ±2 ±1 ±2 ±1 ppm FSR/°C max mV max Zero Code TC Gain Error ±2 ±0.02 ±2 ±0.02 ±2 ±0.02 ppm FSR/°C max % FSR max Gain TC DC Crosstalk2 REFERENCE INPUT/OUTPUT Reference Input2 Reference Input Voltage DC Input Impedance Input Current Reference Range Reference Output Output Voltage Reference TC Output Noise(0.1 Hz to 10 Hz) Noise Spectral Density OUTPUT CHARACTERISTICS2 Output Voltage Range3 Output Voltage TC Output Voltage Drift VS Time Short Circuit Current Load Current Capacitive Load Stability RL = ∞ RL = 10 kΩ DC Output Impedance DIGITAL INPUTS2 VIH, Input High Voltage 2 0.5 2 0.5 2 0.5 ppm FSR/°C max LSB max 5 1 ±10 1/5 4.999/5.001 ±10 TBD TBD ±10 ±13 ±2 ±TBD 10 ±1 200 TBD 0.3 5 1 ±10 1/5 4.999/5.001 ±10 TBD TBD ±10 ±13 ±2 ±TBD 10 ±1 200 TBD 0.3 5 1 ±10 1/5 4.999/5.001 ±10 TBD TBD ±10 ±13 ±2 ±TBD 10 ±1 200 TBD 0.3 V nom MΩ min µA max V min/max V min/max ppm/°C max µV p-p typ nV/√Hz typ V min/max V min/max ppm FSR/°C max ppm FSR/1000 Hours typ mA max mA max pF max pF max Ω max ±1% for specified performance Typically 100 MΩ Typically ±30 nA At 25°C AVDD/AVSS = ±11.4 V AVDD/AVSS = ±16.5 V RISCC = 6 KΩ , See Figure ??? For specified performance DVCC = 2.7 V to 5.5 V, JEDEC compliant 2 2 2 V min 1 2 Temperature range −40°C to +85°C; typical at +25°C. Device functionality is guaranteed to +105°C with degraded performance. Guaranteed by characterization. Not production tested. 3 Output amplifier headroom requirement is 1.4 V min. Rev. PrA 15-Nov-04| Page 4 of 27 Preliminary Technical Data Parameter VIL, Input Low Voltage Input Current Pin Capacitance DIGITAL OUTPUTS (D0,D1, SDO) 2 Output Low Voltage Output High Voltage Output Low Voltage Output High Voltage High Impedance Leakage Current High Impedance Output Capacitance TEMP SENSOR Accuracy Output Voltage @ 25°C Output Voltage Scale Factor Output Voltage Range Output Load Current Power On Time POWER REQUIREMENTS AVDD/AVSS DVCC Power Supply Sensitivity4 ∆VOUT/∆ΑVDD AIDD AISS DICC Power Dissipation A Grade1 0.8 ±10 10 0.4 DVCC – 1 0.4 DVCC – 0.5 ±1 5 B Grade1 0.8 ±10 10 0.4 DVCC – 1 0.4 DVCC – 0.5 ±1 5 C Grade1 0.8 ±10 10 0.4 DVCC – 1 0.4 DVCC – 0.5 ±1 5 Unit V max µA max pF max V max V min V max V min µA max pF typ AD5744/AD5764 Test Conditions/Comments Total for All Pins. TA = TMIN to TMAX. DVCC= 5 V ± 10%, sinking 200 µA DVCC = 5 V ± 10%, Sourcing 200 µA DVCC = 2.7 V to 3.6 V, Sinking 200 µA DVCC = 2.7 V to 3.6 V, Sourcing 200 µA SDO only SDO only ±1 ±5 1.5 5 0/3.0 200 10 11.4/16.5 2.7/5.5 −85 3.75 2.75 1 244 ±1 ±5 1.5 5 0/3.0 200 10 11.4/16.5 2.7/5.5 −85 3.75 2.75 1 244 ±1 ±5 1.5 5 0/3.0 200 10 11.4/16.5 2.7/5.5 −85 3.75 2.75 1 244 °C typ °C max V typ mV/°C typ V min/max µA max ms typ V min/max V min/max dB typ mA/Channel max mA/Channel max mA max mW typ At 25°C −40°C < T