LTC2657BCUFD-L16#PBF

LTC2657 Octal I2C 16-/12-Bit Rail-to-Rail DACs with 10ppm/°C Max Reference DESCRIPTION FEATURES n n n n n n n n n n The LTC®2657 is a family of octal I2C 16-/12-Bit Rail-toRail DACs with Integrated 10ppm/°C Max Reference. The DACs have built-in high performance, rail-to-rail, output buffers and are guaranteed monotonic. The LTC2657-L has a full-scale output of 2.5V with the integrated reference and operates from a single 2.7V to 5.5V supply. The LTC2657-H has a full-scale output of 4.096V with the integrated reference and operates from a 4.5V to 5.5V supply. Each DAC can also operate with an external reference, which sets the full-scale output to 2 times the external reference voltage. Integrated Reference 10ppm/°C Max Maximum INL Error: ±4LSB Guaranteed Monotonic Over Temperature Selectable Internal or External Reference 2.7V to 5.5V Supply Range (LTC2657-L) Integrated Reference Buffers Ultralow Crosstalk between DACs(0.8nV•s) Power-On-Reset to Zero-Scale/Mid-Scale 400kHz I2C Interface Tiny 20-Lead 4mm × 5mm QFN and 20-Lead Thermally enhanced TSSOP packages The parts use a 2-wire I2C compatible serial interface. The LTC2657 operates in both the standard mode (maximum clock rate of 100kHz) and the fast mode (maximum clock rate of 400kHz). The LTC2657 incorporates a power-on reset circuit that is controlled by the PORSEL pin. If PORSEL is tied to GND the DACs reset to zero-scale at power-up. If PORSEL is tied to VCC , the DACs reset to mid-scale at power-up. APPLICATIONS n n n n n Mobile Communications Process Control and Industrial Automation Instrumentation Automatic Test Equipment Automotive L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Protected by U.S. Patents including 5396245, 6891433 and patent pending. BLOCK DIAGRAM REFCOMP INTERNAL REFERENCE REF REFIN/OUT INL vs Code (LTC2657-16) GND REGISTER DAC A REGISTER VOUTA REGISTER REFLO REGISTER VCC 4 DAC H VOUTH 3 DAC G VOUTG INL (LSB) REGISTER REGISTER DAC B REGISTER VOUTB REGISTER 2 1 0 REGISTER REGISTER DAC C REGISTER VOUTC REGISTER –1 DAC F VOUTF DAC A DAC B DAC C DAC D –2 CA2 LDAC DAC E POWER-ON RESET CA0 CA1 REGISTER REGISTER DAC D REGISTER VOUTD REGISTER –3 VOUTE PORSEL –4 128 16384 32768 DAC E DAC F DAC G DAC H 49152 65535 CODE 2657 TA01 32-BIT SHIFT REGISTER 2-WIRE INTERFACE SDA SCL 2657 BD 2657f 1 LTC2657 ABSOLUTE MAXIMUM RATINGS (Notes 1, 2) Supply Voltage (VCC) ................................... –0.3V to 6V SCL, SDA, LDAC, REFLO.............................. –0.3V to 6V VOUTA to VOUTH ................. –0.3V to Min(VCC + 0.3V, 6V) REFIN/OUT, REFCOMP ...... –0.3V to Min(VCC + 0.3V, 6V) PORSEL, CA0, CA1, CA2 ... –0.3V to Min(VCC + 0.3V, 6V) Operating Temperature Range LTC2657C ................................................ 0°C to 70°C LTC2657I..............................................–40°C to 85°C Maximum Junction Temperature........................... 150°C Storage Temperature Range.......................–65 to 150°C Lead Temperature (Soldering FE-Package, 10 sec) .. 300°C PIN CONFIGURATION VCC GND VOUTA REFLO TOP VIEW TOP VIEW REFLO 1 20 GND VOUTA 2 19 VCC VOUTB 3 18 VOUTH VOUTB 1 16 VOUTH REFCOMP 4 17 VOUTG REFCOMP 2 15 VOUTG VOUTC 5 16 VOUTF VOUTC 3 VOUTD 6 15 VOUTE VOUTD 4 8 13 CA0 CA2 9 12 CA1 SCL 10 11 SDA FE PACKAGE 20-LEAD PLASTIC TSSOP TJMAX = 150°C, θJA = 38°C/W, θJC = 10°C/W EXPOSED PAD (PIN 21) IS GND, MUST BE SOLDERED TO PCB 11 CA0 7 8 9 10 CA1 LDAC 12 PORSEL LDAC 6 SDA 14 PORSEL 13 VOUTE REFIN/OUT 5 SCL 7 14 VOUTF 21 CA2 REFIN/OUT 21 20 19 18 17 UFD PACKAGE 20-LEAD (4mm s 5mm) PLASTIC QFN TJMAX = 150°C, θJA = 43°C/W EXPOSED PAD (PIN 21) IS GND, MUST BE SOLDERED TO PCB 2657f 2 LTC2657 PRODUCT SELECTOR GUIDE LTC2657 B C UFD -L 16 #TR PBF LEAD FREE DESIGNATOR TAPE AND REEL TR = Tape and Reel RESOLUTION 16 = 16-Bit 12 = 12-Bit FULL-SCALE VOLTAGE, INTERNAL REFERENCE MODE L = 2.5V H = 4.096V PACKAGE TYPE UFD = 20-Lead (4mm × 5mm) Plastic QFN FE = 20-Lead Thermally Enhanced TSSOP TEMPERATURE GRADE C = Commercial Temperature Range (0°C to 70°C) I = Industrial Temperature Range (–40°C to 85°C) ELECTRICAL GRADE (OPTIONAL) B = ±4LSB INL (MAX) PRODUCT PART NUMBER Consult LTC Marketing for information on non-standard lead based finish parts. For more information on lead free part marking, go to: http://www.linear.com/leadfree/ For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/ 2657f 3 LTC2657 ORDER INFORMATION TEMPERATURE RANGE MAXIMUM INL LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION LTC2657BCFE-L16#PBF LTC2657BCFE-L16#TRPBF LTC2657FE-L16 20-Lead Thermally Enhanced TSSOP 0°C to 70°C ±4 LTC2657BIFE-L16#PBF LTC2657BIFE-L16#TRPBF LTC2657FE-L16 20-Lead Thermally Enhanced TSSOP –40°C to 85°C ±4 LTC2657BCUFD-L16#PBF LTC2657BCUFD-L16#TRPBF 57L16 20-Lead (4mm × 5mm) Plastic QFN 0°C to 70°C ±4 LTC2657BIUFD-L16#PBF LTC2657BIUFD-L16#TRPBF 57L16 20-Lead (4mm × 5mm) Plastic QFN –40°C to 85°C ±4 LTC2657BCFE-H16#PBF LTC2657BCFE-H16#TRPBF LTC2657FE-H16 20-Lead Thermally Enhanced TSSOP 0°C to 70°C ±4 LTC2657BIFE-H16#PBF LTC2657BIFE-H16#TRPBF LTC2657FE-H16 20-Lead Thermally Enhanced TSSOP –40°C to 85°C ±4 LTC2657BCUFD-H16#PBF LTC2657BCUFD-H16#TRPBF 57H16 20-Lead (4mm × 5mm) Plastic QFN 0°C to 70°C ±4 LTC2657BIUFD-H16#PBF LTC2657BIUFD-H16#TRPBF 57H16 20-Lead (4mm × 5mm) Plastic QFN –40°C to 85°C ±4 LTC2657CFE-L12#PBF LTC2657CFE-L12#TRPBF LTC2657FE-L12 20-Lead Thermally Enhanced TSSOP 0°C to 70°C ±1 LTC2657IFE-L12#PBF LTC2657IFE-L12#TRPBF LTC2657FE-L12 20-Lead Thermally Enhanced TSSOP –40°C to 85°C ±1 LTC2657CUFD-L12#PBF LTC2657CUFD-L12#TRPBF 57L12 20-Lead (4mm × 5mm) Plastic QFN 0°C to 70°C ±1 LTC2657IUFD-L12#PBF LTC2657IUFD-L12#TRPBF 57L12 20-Lead (4mm × 5mm) Plastic QFN –40°C to 85°C ±1 LTC2657CFE-H12#PBF LTC2657CFE-H12#TRPBF LTC2657FE-H12 20-Lead Thermally Enhanced TSSOP 0°C to 70°C ±1 LTC2657IFE-H12#PBF LTC2657IFE-H12#TRPBF LTC2657FE-H12 20-Lead Thermally Enhanced TSSOP –40°C to 85°C ±1 LTC2657CUFD-H12#PBF LTC2657CUFD-H12#TRPBF 57H12 20-Lead (4mm × 5mm) Plastic QFN 0°C to 70°C ±1 LTC2657IUFD-H12#PBF LTC2657IUFD-H12#TRPBF 57H12 20-Lead (4mm × 5mm) Plastic QFN –40°C to 85°C ±1 Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.Consult LTC Marketing for information on non-standard lead based finish parts. For more information on lead free part marking, go to: http://www.linear.com/leadfree/ For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/ ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VCC = 2.7V to 5.5V, VOUT unloaded unless otherwise specified. LTC2657B-L16/LTC2657-L12 (Internal Reference = 1.25V) SYMBOL PARAMETER LTC2657-12 MIN TYP MAX CONDITIONS LTC2657B-16 MIN TYP MAX UNITS DC Performance l 12 16 Bits Monotonicity (Note 3) l 12 16 Bits Differential Nonlinearity (Note 3) l ±0.1 ±0.5 Integral Nonlinearity (Note 3) VCC = 5.5V, VREF = 2.5V l ±0.5 ±1 Load Regulation VCC = 5V ±10%, Internal Reference, Mid-Scale, –15mA ≤ IOUT ≤ 15mA l 0.04 0.125 VCC = 3V ±10%, Internal Reference, Mid-Scale, –7.5mA ≤ IOUT ≤ 7.5mA l 0.06 l l Resolution DNL INL ZSE Zero-Scale Error VOS Offset Error GE Gain Error (Note 4) VREF = 1.25V VOS Temperature Coefficient Gain Temperature Coefficient ±1 LSB ±2 ±4 LSB 0.6 2 LSB/mA 0.25 1 4 LSB/mA 1 3 1 3 mV ±1 ±2 ±1 ±2 mV 2 l ±0.3 ±0.02 ±0.1 1 2 ±0.02 ±0.1 1 μV/°C %FSR ppm/°C 2657f 4 LTC2657 ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VCC = 2.7V to 5.5V, VOUT unloaded unless otherwise specified. LTC2657B-L16/LTC2657-L12 (Internal Reference = 1.25V) SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS VOUT DAC Output Span Internal Reference External Reference = VEXTREF PSR Power Supply Rejection VCC ±10% ROUT DC Output Impedance VCC = 5V ±10%, Internal Reference, Mid-Scale, –15mA ≤ IOUT ≤ 15mA l 0.04 0.15 Ω VCC = 3V ±10%, Internal Reference, Mid-Scale, –7.5mA ≤ IOUT ≤ 7.5mA l 0.04 0.15 Ω ISC 0 to 2.5 0 to 2 • VEXTREF V V –80 dB DC Crosstalk (Note 5) Due to Full-Scale Output Change Due to Load Current Change Due to Powering Down (per Channel) ±1.5 ±2 ±1 μV μV/mA μV Short-Circuit Output Current (Note 6) VCC = 5.5V, VEXTREF = 2.8V Code: Zero-Scale, Forcing Output to VCC Code: Full-Scale, Forcing Output to GND l l 20 20 65 65 mA mA VCC = 2.7V, VEXTREF = 1.4V Code: Zero-Scale, Forcing Output to VCC Code: Full-Scale, Forcing Output to GND l l 10 10 40 40 mA mA Reference Reference Output Voltage 1.248 Reference Temperature Coefficient (Note 7) C-Grade Only Reference Line Regulation VCC ±10% Reference Short-Circuit Current VCC = 5.5V, Forcing REFIN/OUT to GND l REFCOMP Pin Short-Circuit Current VCC = 5.5V, Forcing REFCOMP to GND l Reference Load Regulation VCC = 3V ±10% or 5V ±10%, IOUT = 100μA Sourcing External Reference Mode (Note 14) ±2 ±10 200 40 0.5 0.001 (Note 9) ppm/°C mA μA mV/mA 30 l V dB 5 l Reference Input Current Reference Input Capacitance 1.252 –80 Reference Output Voltage Noise Density CREFCOMP = CREFIN/OUT = 0.1μF at f = 1kHz Reference Input Range 1.25 nV/√Hz VCC/2 V 1 μA 40 pF Power Supply VCC Positive Supply Voltage For Specified Performance l ICC Supply Current (Note 8) VCC = 5V, Internal Reference On VCC = 5V, Internal Reference Off VCC = 3V, Internal Reference On VCC = 3V, Internal Reference Off l l l l ISD Supply Current in Shutdown Mode (Note 8) VCC = 5V 2.7 5.5 V 4.25 3.7 3.8 3.2 mA mA mA mA l 3 μA 0.3VCC V 3.1 2.7 3 2.6 Digital I/O VIL Low Level Input Voltage (SDA and SCL) l VIH High Level Input Voltage (SDA and SCL) l VIL(LDAC) Low Level Input Voltage (LDAC) VIH(LDAC) High Level Input Voltage (LDAC) 0.7VCC V VCC = 4.5V to 5.5V l 0.8 V VCC = 2.7V to 4.5V l 0.6 V VCC = 3.6V to 5.5V l 2.4 V VCC = 2.7V to 3.6V l 2 V 2657f 5 LTC2657 ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VCC = 2.7V to 5.5V, VOUT unloaded unless otherwise specified. LTC2657B-L16/LTC2657-L12 (Internal Reference = 1.25V) SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS VIL(CA) Low Level Input Voltage (CA0 and CA2) See Test Circuit 1 l VIH(CA) High Level Input Voltage (CA0 and CA2) See Test Circuit 1 l RINH Resistance from CAn (n = 0,1, 2) to VCC to Set CAn = VCC See Test Circuit 2 l 10 kΩ RINL Resistance from CAn (n = 0,1, 2) to GND to Set CAn = GND See Test Circuit 2 l 10 kΩ RINF Resistance from CAn (n = 0,1, 2) to VCC or GND to Set CAn=FLOAT See Test Circuit 2 l 2 VOL Low Level Output Voltage Sink Current = 3mA l 0 0.4 V VO = VIH(MIN) to VO = VIL(MAX), CB = 10pF to 400pF (Note 13) l 20+0.1CB 250 ns l 50 ns 0.15VCC V 0.85VCC V MΩ tOF Output Fall Time tSP Pulse Width of Spikes Suppressed by Input Filter IIN Input Leakage 0.1VCC ≤ VIN ≤ 0.9VCC l 1 μA CIN I/O Pin Capacitance (Note 9) l 10 pF CB Capacitance Load for Each Bus Line l 400 pF CCAn External Capacitive Load on Address Pins CA0, CA1 and CA2 l 10 pF 0 The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VCC = 4.5V to 5.5V, VOUT unloaded unless otherwise specified. LTC2657B-H16/LTC2657-H12 (Internal Reference = 2.048V) SYMBOL PARAMETER LTC2657-12 MIN TYP MAX CONDITIONS LTC2657B-16 MIN TYP MAX UNITS DC Performance l 12 16 Bits Monotonicity (Note 3) l 12 16 Bits Differential Nonlinearity (Note 3) l ±0.1 ±0.5 Integral Nonlinearity (Note 3) VCC = 5.5V, VREF = 2.5V l ±0.5 ±1 Load Regulation VCC = 5V ±10%, Internal Reference, Mid-Scale, –15mA ≤ IOUT ≤ 15mA l 0.04 0.125 Resolution DNL INL ZSE Zero-Scale Error VOS Offset Error GE Gain Error (Note 4) VREF = 2.048V ±1 LSB ±2 ±4 LSB 0.6 2 LSB/mA l 1 3 1 3 mV l ±1 ±2 ±1 ±2 mV VOS Temperature Coefficient Gain Temperature Coefficient ±0.3 2 l ±0.02 ±0.1 1 2 ±0.02 ±0.1 1 μV/°C %FSR ppm/°C 2657f 6 LTC2657 ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VCC = 4.5V to 5.5V, VOUT unloaded unless otherwise specified. LTC2657B-H16/LTC2657-H12 (Internal Reference = 2.048V) SYMBOL PARAMETER VOUT DAC Output Span CONDITIONS Internal Reference External Reference = VEXTREF PSR Power Supply Rejection VCC ±10% ROUT DC Output Impedance VCC = 5V ±10%, Internal Reference, MidScale, –15mA ≤ IOUT ≤ 15mA DC Crosstalk Due to Full-Scale Output Change Due to Load Current Change Due to Powering Down (per Channel) Short-Circuit Output Current (Note 4) VCC = 5.5V, VEXTREF = 2.8V Code: Zero-Scale, Forcing Output to VCC Code: Full-Scale, Forcing Output to GND ISC MIN TYP MAX 0 to 4.096 0 to 2 • VEXTREF V V –80 l 0.04 dB 0.15 ±1.5 ±2 ±1 l l 20 20 UNITS Ω μV μV/mA μV 65 65 mA mA Reference Reference Output Voltage 2.044 Reference Temperature Coefficient (Note 7) C-Grade Only Reference Line Regulation VCC ±10% Reference Short-Circuit Current VCC = 5.5V, Forcing REFIN/OUT to GND REFCOMP Pin Short-Circuit Current VCC = 5.5V, Forcing REFCOMP to GND l Reference Load Regulation VCC = 3V ±10% or 5V ±10%, IOUT = 100μA Sourcing Reference Output Voltage Noise Density CREFCOMP = CREFIN/OUT = 0.1μF at f = 1kHz External Reference Mode (Note 14) ±10 l V ppm/°C dB 5 mA 200 μA 40 mV/mA 35 nV/√Hz 0.5 l 0.001 (Note 9) l 40 Reference Input Current Reference Input Capacitance 2.052 ±2 –80 l Reference Input Range 2.048 VCC/2 V 1 μA pF Power Supply VCC Positive Supply Voltage For Specified Performance l ICC Supply Current (Note 8) VCC = 5V, Internal Reference On VCC = 5V, Internal Reference Off l l ISD Supply Current in Shutdown Mode (Note 8) VCC = 5V VIL VIH 4.5 5.5 V 4.25 3.7 mA mA l 3 μA Low Level Input Voltage (SDA and SCL) l 0.3VCC V High Level Input Voltage (SDA and SCL) l 3.3 3 Digital I/O VIL(LDAC) Low Level Input Voltage (LDAC) VCC = 4.5V to 5.5V l VIH(LDAC) High Level Input Voltage (LDAC) VCC = 4.5V to 5.5V l See Test Circuit 1 l VIL(CA) Low Level Input Voltage (CA0 to CA2) 0.7VCC V 0.8V 2.4 V V 0.15VCC V VIH(CA) High Level Input Voltage (CA0 to CA2) See Test Circuit 1 l RINH Resistance from CAn (n = 0,1, 2) to VCC to Set CAn = VCC See Test Circuit 2 l 10 kΩ RINL Resistance from CAn (n = 0,1, 2) to GND to Set CAn = GND See Test Circuit 2 l 10 kΩ RINF Resistance from CAn (n = 0,1, 2) to VCC or GND to Set CAn = FLOAT See Test Circuit 2 l 2 VOL Low Level Ouput Voltage Sink Current = 3mA l 0 0.85VCC V MΩ 0.4 V 2657f 7 LTC2657 ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VCC = 4.5V to 5.5V, VOUT unloaded unless otherwise specified. LTC2657B-H16/LTC2657-H12 (Internal Reference = 2.048V) SYMBOL PARAMETER CONDITIONS VO = VIH(MIN) to VO = VIL(MAX), CB = 10pF to 400pF (Note 13) MIN TYP MAX UNITS l 20+0.1CB 250 ns l 50 ns 1 μA tOF Output Fall Time tSP Pulse Width of Spikes Suppressed by Input Filter IIN Input Leakage 0.1VCC ≤ VIN ≤ 0.9VCC l CIN I/O Pin Capacitance (Note 9) l 10 pF CB Capacitance Load for Each Bus Line l 400 pF CCAn External Capacitive Load on Address Pins CA0, CA1 and CA2 l 10 pF 0 The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VCC = 2.7V to 5.5V, VOUT unloaded unless otherwise specified. LTC2657B-H16/LTC2657-H12/ LTC2657B-L16/LTC2657-L12 SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS AC Performance tS Settling Time (Note 10) ±0.024% (±1LSB at 12 Bits) ±0.0015% (±1LSB at 16 Bits) 3.9 9.1 μs μs Settling Time for 1LSB Step ±0.024% (±1LSB at 12 Bits) ±0.0015% (±1LSB at 16 Bits) 2.4 4.5 μs μs 1.8 V/μs Voltage Output Slew Rate Capacitive Load Driving Glitch Impulse (Note 11) DAC-to-DAC Crosstalk (Note 12) 1000 At Mid-Scale Transition, L-Option nV•s At Mid-Scale Transition, H-Option 7 nV•s CREFCOMP = CREFIN/OUT = 0.22μF 0.8 nV•s Multiplying Bandwidth en 4 pF 150 kHz Output Voltage Noise Density At f = 1kHz At f = 10kHz 85 80 nV/√Hz nV/√Hz Output Voltage Noise 0.1Hz to 10Hz, Internal Reference (L-Options) 0.1Hz to 10Hz, Internal Reference (H-Options) 0.1Hz to 200kHz, Internal Reference (L-Options) 0.1Hz to 200kHz, Internal Reference (H-Options) 8 12 600 650 μVP-P μVP-P μVP-P μVP-P 2657f 8 LTC2657 TIMING CHARACTERISTICS The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. LTC2657B-L16/LTC2657-L12/LTC2657B-H16/LTC2657-H12 (see Figure 1). SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS 400 kHz VCC = 2.7V to 5.5V fSCL SCL Clock Frequency l 0 tHD(STA) Hold Time (Repeated) Start Condition l 0.6 μs tLOW Low Period of the SCL Clock Pin l 1.3 μs tHIGH High Period of the SCL Clock Pin l 0.6 μs tSU(STA) Set-Up Time for a Repeated Start Program l 0.6 μs tHD(DAT) Data Hold Time l 0 tSU(DAT) Data Set-Up Time l 100 tr Rise Time of Both SDA and SCL Signals l tf Fall Time of Both SDA and SCL Signals 0.9 μs 20+0.1CB 300 ns l 20+0.1CB 300 ns ns tSU(STO) Set-Up Time for Stop Condition l 0.6 μs tBUF Bus Free Time Between a Stop and Start Condition l 1.3 μs t1 Falling edge of the 9th Clock of the 3rd Input Byte to LDAC High or Low Transition l 400 ns t2 LDAC Low Pulse Width l 20 ns Note 1: Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. Exposure to any Absolute Maximum Rating condition for extended periods may affect device reliability and lifetime. Note 2: All voltages are with respect to GND. Note 3: Linearity and monotonicity are defined from code kL to code 2N – 1, where N is the resolution and kL is the lower end code for which no output limiting occurs. For VREF = 2.5V and N = 16, kL = 128 and linearity is defined from code 128 to code 65535. For VREF = 2.5V and N = 12, kL = 8 and linearity is defined from code 8 to code 4,095. Note 4: Inferred from measurement at code 128 (LTC2657-16) or code 8 (LTC2657-12). Note 5: DC crosstalk is measured with VCC = 5V and using internal reference with the measured DAC at mid-scale. Note 6: This IC includes current limiting that is intended to protect the device during momentary overload conditions. Junction temperature can exceed the rated maximum during current limiting. Continuous operation above the specified maximum operating junction temperature may impair device reliability. Note 7: Temperature coefficient is calculated by dividing the maximum change in output voltage by the specified temperature range. Note 8: Digital inputs at 0V or VCC. Note 9: Guaranteed by design and not production tested. Note 10: Internal reference mode. DAC is stepped 1/4 scale to 3/4 scale and 3/4 scale to 1/4 scale. Load is 2kΩ in parallel with 200pF to GND. Note 11: VCC = 5V (H-Options) or VCC = 3V (L-Options), internal reference mode. DAC is stepped ±1LSB between half-scale and half-scale –1. Load is 2k in parallel with 200pF to GND. Note 12: DAC-to-DAC crosstalk is the glitch that appears at the output of one DAC due to a full-scale change at the output of another DAC. It is measured with VCC = 5V, using internal reference, with the measured DAC at mid-scale. Note 13: CB = capacitance of one bus line in pF. Note 14: Gain error specification may be degraded for reference input voltages less than 1V. See Gain Error vs Reference Input curve in the Typical Performance Characteristics section. 2657f 9 LTC2657 TYPICAL PERFORMANCE CHARACTERISTICS Integral Nonlinearity (INL) 4 LTC2657-L16, TA = 25°C unless otherwise noted. Differential Nonlinearity (DNL) 1 VCC = 3V INL vs Temperature 4 VCC = 3V 3 VCC = 3V 3 2 0.5 2 0 –1 –2 INL (LSB) DNL (LSB) INL (LSB) INL (POS) 1 0 0 INL (NEG) –1 –0.5 –2 –3 –4 128 1 –3 16384 32768 CODE 49152 65535 –1 128 16384 32768 CODE 65535 49152 2657 G01 2657 G03 REFIN/OUT Output Voltage vs Temperature 1.253 VCC = 3V VCC = 3V 1.252 0.5 VREFIN/OUT (V) DNL (POS) DNL (LSB) 10 30 50 70 90 110 130 TEMPERATURE (°C) 2657 G02 DNL vs Temperature 1 –4 –50 –30 –10 0 DNL (NEG) –0.5 1.251 1.250 1.249 1.248 –1 –50 –30 –10 10 30 50 70 90 110 130 TEMPERATURE (°C) 1.247 –50 –30 –10 10 30 50 70 90 110 130 TEMPERATURE (°C) 3586 G35 2657 G05 Settling to ±1LSB Rising SCL 3V/DIV Settling to ±1LSB Falling 3/4 SCALE TO 1/4 SCALE STEP VCC = 3V, VFS = 2.5V RL = 2k, CL = 200pF AVERAGE OF 2048 EVENTS 9TH CLOCK OF 3RD DATA BYTE 1/4 SCALE TO 3/4 SCALE STEP VCC = 3V, VFS = 2.5V RL = 2k, CL = 200pF AVERAGE OF 2048 EVENTS VOUT 100μV/DIV 8.6μs SCL 3V/DIV VOUT 150μV/DIV 9TH CLOCK OF 3RD DATA BYTE 9μs 2μs/DIV 2μs/DIV 2657 G07 2657 G08 2657f 10 LTC2657 TYPICAL PERFORMANCE CHARACTERISTICS Integral Nonlinearity (INL) 4 LTC2657-H16, TA = 25°C unless otherwise noted. Differential Nonlinearity (DNL) 1 VCC = 5V INL vs Temperature 4 VCC = 5V 3 0.5 DNL (LSB) 1 0 –1 INL (LSB) 2 0 INL (POS) 1 0 –1 INL (NEG) –0.5 –2 –2 –3 –3 16384 32768 CODE 49152 65535 –1 128 16384 32768 CODE 49152 2657 G10 65535 1 –4 –50 –30 –10 10 30 50 70 90 110 130 TEMPERATURE (°C) 2657 G011 3586 G35 REFIN/OUT Output Voltage vs Temperature DNL vs Temperature 2.054 VCC = 5V VCC = 5V 2.052 VREFIN/OUT (V) 0.5 DNL (LSB) INL (LSB) 2 –4 128 VCC = 5V 3 DNL (POS) 0 DNL (NEG) 2.050 2.048 2.046 –0.5 2.044 –1 –50 –30 –10 10 30 50 70 90 110 130 TEMPERATURE (°C) 2.042 –50 –30 –10 10 30 50 70 90 110 130 TEMPERATURE (°C) 2657 G14 2657 G13 Settling to ±1LSB Rising SCL 5V/DIV Settling to ±1LSB Falling 9TH CLOCK OF 3RD DATA BYTE 9.2μs VOUT 250μV/DIV 9.7μs VOUT 250μV/DIV 9TH CLOCK OF 3RD DATA BYTE 1/4 SCALE TO 3/4 SCALE STEP VCC = 5V, VFS = 4.096V RL = 2k, CL = 200pF AVERAGE OF 2048 EVENTS SCL 5V/DIV 3/4 SCALE TO 1/4 SCALE STEP VCC = 5V, VFS = 4.096V RL = 2k, CL = 200pF AVERAGE OF 2048 EVENTS 2μs/DIV 2μs/DIV 2657 G16 2657 G17 2657f 11 LTC2657 TYPICAL PERFORMANCE CHARACTERISTICS Integral Nonlinearity (INL) 1 Differential Nonlinearity (DNL) 1 VCC = 5V VREF = 2.048V 0.5 Settling to ±1LSB VCC = 5V VREF = 2.048V 3/4 SCALE TO 1/4 SCALE STEP VCC = 3V, VFS = 2.5V RL = 2k, CL = 200pF AVERAGE OF 2048 EVENTS 0.5 VOUT 500μV/DIV DNL(LSB) INL(LSB) LTC2657-12, TA = 25°C unless otherwise noted. 0 3.5μs 0 –0.5 –0.5 –1 SCL 3V/DIV –1 8 1024 2048 CODE 3072 8 4095 1024 2048 CODE 2657 G19 3072 4095 2μs/DIV 2657 G21 2657 G20 LTC2657 Load Regulation 5.0 0.20 6 4 VCC = 5V (LTC2657-H) VCC = 3V (LTC2657-L) 0.15 VCC = 5V (LTC2657-H) VCC = 3V (LTC2657-L) INTERNAL REF. CODE = MID-SCALE 0.10 INTERNAL REF. CODE = MID-SCALE ΔVOUT (V) 2 0 –2 5V SOURCING 4.5 4.0 3V SOURCING (LTC2657-L) 3.5 0.05 VOUT (V) 8 0 –0.05 3.0 2.5 2.0 1.5 –4 –0.10 –6 1.0 –0.15 –8 –10 –50 –40 –30 –20 –10 0 10 20 30 40 50 IOUT (mA) 0 –0.20 –50 –40 –30 –20 –10 0 10 20 30 40 50 IOUT (mA) 2657 G22 Offset Error vs Temperature Zero-Scale Error vs Temperature 0.75 ZERO-SCALE ERROR (mV) –0.25 –0.5 –1 –50 –30 –10 10 30 50 70 90 110 130 TEMPERATURE (°C) 2657 G25 3 4 5 6 IOUT (mA) 7 8 9 10 Gain Eror vs Temperature 48 32 2 1.5 1 16 0 –16 –32 0.5 –0.75 2 64 2.5 0 1 2657 G24 3 0.25 0 2657 G23 1 0.5 5V SINKING 3V SINKING (LTC2657-L) 0.5 GAIN ERROR (LSB) ΔVOUT (mV) Headroom at Rails vs Output Current Current Limiting 10 OFFSET ERROR (mV) 9TH CLOCK OF 3RD DATA BYTE –48 0 –50 –30 –10 10 30 50 70 90 110 130 TEMPERATURE (°C) 2657 G26 –64 –50 –30 –10 10 30 50 70 90 110 130 TEMPERATURE (°C) 2657 G27 2657f 12 LTC2657 TYPICAL PERFORMANCE CHARACTERISTICS Offset Error vs Reference Input VCC = 5.5V GAIN ERROR OF 8 CHANNELS 350 0 – 0.5 0 –16 –1 –32 –1.5 –48 2 1 1.5 REFERENCE VOLTAGE (V) 300 16 ICC (nA) 0.5 –2 0.5 50 2 1 1.5 REFERENCE VOLTAGE (V) 0 2.5 2.5 3.0 3.5 4.0 VCC (V) 4.5 5.0 2657 G29 Supply Current vs Logic Voltage VCC = 5V (LTC2657-H) 200 100 –64 0.5 2.5 250 150 2657 G28 Supply Current vs Temperature SWEEP SCL, SDA BETWEEN OV AND VCC 5.5 2657 G30 ICC Shutdown vs Temperature 4.0 3 3.5 SUPPLY CURRENT (mA) 3.6 ICC (mA) 400 32 1 4.0 ICC Shutdown vs VCC 450 VCC = 5.5V 48 GAIN ERROR OF 8 CHANNELS GAIN ERROR (LSB) OFFSET ERROR (mV) 1.5 Gain Error vs Reference Input 64 3.2 2.8 LTC2657-H VCC = 5V, CODE = MID-SCALE INTERNAL REFERENCE 3.0 2.5 VCC = 3V (LTC2657-L) 2.4 2.0 0 1 2 3 LOGIC VOLTAGE (V) 4 5 LTC2657-L VCC = 3V, CODE = MID-SCALE INTERNAL REFERENCE 2.0 –50 –30 –10 10 30 50 70 90 110 130 TEMPERATURE (°C) 2657 G31 ICC SHUTDOWN (μA) 2 LTC2657, TA = 25°C unless otherwise noted. 2 1 LTC2657-H VCC = 5V LTC2657-L VCC = 3V 0 –50 –30 –10 10 30 50 70 90 110 130 TEMPERATURE (°C) 2657 G32 Multiplying Bandwidth 2657 G33 Large Signal Response Mid-Scale Glitch Impulse 8 6 SCL 5V/DIV AMPLITUDE (dB) 4 9th CLOCK OF 3RD DATA BYTE 2 0 VOUT 0.5V/DIV –2 –4 –6 –8 VCC = 5V VREF(DC) = 2V –10 VREF(AC) = 0.2VPP CODE = FULL-SCALE –12 1k 100k 10k FREQUENCY (Hz) 1M LTC2657-H16, VCC = 5V 7nV-s TYP VCC = 5V VREF = 2.048V ZERO SCALE TO FULL SCALE VOUT 5mV/DIV LTC2657-L16, VCC = 3V 4nV-s TYP 2μs/DIV 2μs/DIV 2657 G35 2657 G36 2657 G34 2657f 13 LTC2657 TYPICAL PERFORMANCE CHARACTERISTICS DAC to DAC Crosstalk (Dynamic) LTC2657 Power On Reset to Zero-Scale Power On Reset to Mid-Scale LTC2657-H ONE DAC SWITCH FS-0 2V/DIV VCC 2V/DIV LTC2657-H16, VCC = 5V, 0.8nV • s TYP CREFCOMP = CREFOUT = 0.22μF VOUT 0.5mV/DIV VOUT 10mV/DIV VCC 2V/DIV ZERO-SCALE Noise Voltage Density vs Frequency NOISE VOLTAGE (nV/√Hz) 2657 G39 2657 G38 2657 G37 DAC Output 0.1Hz to 10Hz Voltage Noise VCC = 5V CODE = MID-SCALE INTERNAL REF CREFCOMP = CREFOUT = 0.1μF 1000 250μs/DIV 200μs/DIV 2μs/DIV 1200 VOUT 1V/DIV Reference Output 0.1Hz to 10Hz Voltage Noise VCC = 5V, VFS = 2.5V CODE = MID-SCALE INTERNAL REF CREFCOMP = CREFOUT = 0.1μF VREFOUT = 1.25V CREFCOMP = CREFOUT = 0.1μF 800 5μV/DIV 600 2μV/DIV 400 LTC2657-H 200 LTC2657-L 0 1 10 100 1k 10k FREQUENCY (Hz) 100k 1M 1 SEC/DIV 1 SEC/DIV 2657 G41 2657 G42 2657 G40 2657f 14 LTC2657 PIN FUNCTIONS (QFN/TSSOP) VOUTA to VOUTH (Pins 1, 3, 4, 13, 14, 15, 16, 20/Pins 2, 3, 5, 6, 15, 16, 17, 18): DAC Analog Voltage Outputs. The output range is 0V to 2 times the voltage at the REFIN/OUT pin. REFCOMP(Pin2/Pin4):InternalReferenceCompensation pin. For low noise and reference stability, tie 0.1μF cap to GND. Connect to GND to use an external reference at start-up. Command 0111b must still be issued to turn off internal reference. REFIN/OUT (Pin 5/Pin 7): This pin acts as the Internal Reference output in Internal Reference mode and acts as the Reference Input pin in External Reference mode. When acting as an output the nominal voltage at this pin is 1.25V for-L Options and 2.048V for-H Options. For low noise and reference stability tie a capacitor to GND. Capacitor value must be