LTC2657BCUFD-H16PBF

FEATURES n n n n n n n n n n LTC2657 Octal I2C 16-/12-Bit Rail-to-Rail DACs with 10ppm/°C Max Reference DESCRIPTION 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. 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. 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. 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 APPLICATIONS n n n n n Mobile Communications Process Control and Industrial Automation Instrumentation Automatic Test Equipment Automotive BLOCK DIAGRAM REFCOMP GND REGISTER REGISTER REGISTER REGISTER REFLO VOUTA DAC A VCC REF INTERNAL REFERENCE REFIN/OUT INL vs Code (LTC2657-16) 4 DAC H VOUTH 3 2 REGISTER REGISTER REGISTER REGISTER VOUTB DAC B DAC G VOUTG INL (LSB) 1 0 –1 REGISTER REGISTER REGISTER REGISTER VOUTC DAC C DAC F VOUTF –2 –3 DAC A DAC B DAC C DAC D 16384 32768 CODE 49152 DAC E DAC F DAC G DAC H 65535 2657 TA01 REGISTER REGISTER REGISTER VOUTD CA0 CA1 CA2 LDAC REGISTER DAC D DAC E POWER-ON RESET VOUTE PORSEL –4 128 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 REFLO VOUTA TOP VIEW REFLO VOUTA VOUTB REFCOMP VOUTC VOUTD REFIN/OUT LDAC CA2 1 2 3 4 5 6 7 8 9 21 20 GND 19 VCC 18 VOUTH 17 VOUTG 16 VOUTF 15 VOUTE 14 PORSEL 13 CA0 12 CA1 11 SDA VOUTB 1 REFCOMP 2 VOUTC 3 VOUTD 4 REFIN/OUT 5 LDAC 6 7 CA2 8 SCL 9 10 SDA CA1 21 TOP VIEW GND VCC 16 VOUTH 15 VOUTG 14 VOUTF 13 VOUTE 12 PORSEL 11 CA0 20 19 18 17 SCL 10 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 UFD PACKAGE 20-LEAD (4mm 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 LEAD FREE FINISH LTC2657BCFE-L16#PBF LTC2657BIFE-L16#PBF LTC2657BCUFD-L16#PBF LTC2657BIUFD-L16#PBF LTC2657BCFE-H16#PBF LTC2657BIFE-H16#PBF LTC2657BCUFD-H16#PBF LTC2657BIUFD-H16#PBF LTC2657CFE-L12#PBF LTC2657IFE-L12#PBF LTC2657CUFD-L12#PBF LTC2657IUFD-L12#PBF LTC2657CFE-H12#PBF LTC2657IFE-H12#PBF LTC2657CUFD-H12#PBF LTC2657IUFD-H12#PBF TAPE AND REEL LTC2657BCFE-L16#TRPBF LTC2657BIFE-L16#TRPBF LTC2657BIUFD-L16#TRPBF LTC2657BCFE-H16#TRPBF LTC2657BIFE-H16#TRPBF LTC2657BIUFD-H16#TRPBF LTC2657CFE-L12#TRPBF LTC2657IFE-L12#TRPBF LTC2657CUFD-L12#TRPBF LTC2657IUFD-L12#TRPBF LTC2657CFE-H12#TRPBF LTC2657IFE-H12#TRPBF LTC2657CUFD-H12#TRPBF LTC2657IUFD-H12#TRPBF PART MARKING* PACKAGE DESCRIPTION LTC2657FE-L16 LTC2657FE-L16 57L16 LTC2657FE-H16 LTC2657FE-H16 57H16 LTC2657FE-L12 LTC2657FE-L12 57L12 57L12 LTC2657FE-H12 LTC2657FE-H12 57H12 57H12 20-Lead Thermally Enhanced TSSOP 20-Lead Thermally Enhanced TSSOP 20-Lead (4mm × 5mm) Plastic QFN 20-Lead (4mm × 5mm) Plastic QFN 20-Lead Thermally Enhanced TSSOP 20-Lead Thermally Enhanced TSSOP 20-Lead (4mm × 5mm) Plastic QFN 20-Lead (4mm × 5mm) Plastic QFN 20-Lead Thermally Enhanced TSSOP 20-Lead Thermally Enhanced TSSOP 20-Lead (4mm × 5mm) Plastic QFN 20-Lead (4mm × 5mm) Plastic QFN 20-Lead Thermally Enhanced TSSOP 20-Lead Thermally Enhanced TSSOP 20-Lead (4mm × 5mm) Plastic QFN 20-Lead (4mm × 5mm) Plastic QFN TEMPERATURE RANGE 0°C to 70°C –40°C to 85°C 0°C to 70°C – 40°C to 85°C 0°C to 70°C –40°C to 85°C 0°C to 70°C – 40°C to 85°C 0°C to 70°C –40°C to 85°C 0°C to 70°C – 40°C to 85°C 0°C to 70°C –40°C to 85°C 0°C to 70°C – 40°C to 85°C MAXIMUM INL ±4 ±4 ±4 ±4 ±4 ±4 ±4 ±4 ±1 ±1 ±1 ±1 ±1 ±1 ±1 ±1 LTC2657BCUFD-L16#TRPBF 57L16 LTC2657BCUFD-H16#TRPBF 57H16 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/ 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 DC Performance Resolution Monotonicity DNL INL Differential Nonlinearity Integral Nonlinearity (Note 3) Load Regulation (Note 3) (Note 3) VCC = 5.5V, VREF = 2.5V VCC = 5V ±10%, Internal Reference, Mid-Scale, –15mA ≤ IOUT ≤ 15mA VCC = 3V ±10%, Internal Reference, Mid-Scale, –7.5mA ≤ IOUT ≤ 7.5mA ZSE VOS GE Zero-Scale Error Offset Error VOS Temperature Coefficient Gain Error Gain Temperature Coefficient l l l l l l l l ELECTRICAL CHARACTERISTICS CONDITIONS LTC2657-12 MIN TYP MAX 12 12 ±0.1 ±0.5 ±0.5 ±1 LTC2657B-16 MIN TYP MAX 16 16 ±0.3 ±2 0.6 1 1 ±1 2 ±0.02 ±0.1 1 ±1 ±4 2 4 3 ±2 UNITS Bits Bits LSB LSB LSB/mA LSB/mA mV mV μV/°C %FSR ppm/°C 0.04 0.125 0.06 1 ±1 2 ±0.02 ±0.1 1 0.25 3 ±2 (Note 4) VREF = 1.25V l 2657f 4 LTC2657 ELECTRICAL CHARACTERISTICS SYMBOL PARAMETER VOUT PSR ROUT DAC Output Span Power Supply Rejection DC Output Impedance 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) CONDITIONS Internal Reference External Reference = VEXTREF VCC ±10% VCC = 5V ±10%, Internal Reference, Mid-Scale, –15mA ≤ IOUT ≤ 15mA VCC = 3V ±10%, Internal Reference, Mid-Scale, –7.5mA ≤ IOUT ≤ 7.5mA DC Crosstalk (Note 5) Due to Full-Scale Output Change Due to Load Current Change Due to Powering Down (per Channel) VCC = 5.5V, VEXTREF = 2.8V Code: Zero-Scale, Forcing Output to VCC Code: Full-Scale, Forcing Output to GND VCC = 2.7V, VEXTREF = 1.4V Code: Zero-Scale, Forcing Output to VCC Code: Full-Scale, Forcing Output to GND Reference Reference Output Voltage Reference Temperature Coefficient Reference Line Regulation Reference Short-Circuit Current REFCOMP Pin Short-Circuit Current Reference Load Regulation (Note 7) C-Grade Only VCC ±10% VCC = 5.5V, Forcing REFIN/OUT to GND VCC = 5.5V, Forcing REFCOMP to GND VCC = 3V ±10% or 5V ±10%, IOUT = 100μA Sourcing External Reference Mode (Note 14) (Note 9) For Specified Performance VCC = 5V, Internal Reference On VCC = 5V, Internal Reference Off VCC = 3V, Internal Reference On VCC = 3V, Internal Reference Off VCC = 5V l l l l l l l l l l l l l l l l MIN TYP 0 to 2.5 0 to 2 • VEXTREF –80 0.04 0.04 ±1.5 ±2 ±1 MAX UNITS V V dB 0.15 0.15 Ω Ω μV μV/mA μV ISC Short-Circuit Output Current (Note 6) 20 20 10 10 1.248 1.25 ±2 –80 65 65 40 40 1.252 ±10 5 200 40 30 mA mA mA mA V ppm/°C dB mA μA mV/mA nV/√Hz Reference Output Voltage Noise Density CREFCOMP = CREFIN/OUT = 0.1μF at f = 1kHz Reference Input Range Reference Input Current Reference Input Capacitance Power Supply VCC ICC Positive Supply Voltage Supply Current (Note 8) 2.7 0.5 VCC/2 0.001 40 5.5 3.1 2.7 3 2.6 4.25 3.7 3.8 3.2 3 1 V μA pF V mA mA mA mA μA ISD Digital I/O VIL VIH Supply Current in Shutdown Mode (Note 8) Low Level Input Voltage (SDA and SCL) High Level Input Voltage (SDA and SCL) l l 0.3VCC 0.7VCC 0.8 0.6 2.4 2 V V V V V V 2657f VIL(LDAC) Low Level Input Voltage (LDAC) VIH(LDAC) High Level Input Voltage (LDAC) VCC = 4.5V to 5.5V VCC = 2.7V to 4.5V VCC = 3.6V to 5.5V VCC = 2.7V to 3.6V l l l l 5 LTC2657 ELECTRICAL CHARACTERISTICS SYMBOL PARAMETER VIL(CA) VIH(CA) RINH RINL RINF VOL tOF tSP IIN CIN CB CCAn 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) CONDITIONS l l l l l l MIN 0.85VCC TYP MAX 0.15VCC 10 10 UNITS V V kΩ kΩ MΩ Low Level Input Voltage (CA0 and CA2) See Test Circuit 1 High Level Input Voltage (CA0 and CA2) See Test Circuit 1 Resistance from CAn (n = 0,1, 2) to VCC to Set CAn = VCC Resistance from CAn (n = 0,1, 2) to GND to Set CAn = GND Resistance from CAn (n = 0,1, 2) to VCC or GND to Set CAn=FLOAT Low Level Output Voltage Output Fall Time Pulse Width of Spikes Suppressed by Input Filter Input Leakage I/O Pin Capacitance Capacitance Load for Each Bus Line External Capacitive Load on Address Pins CA0, CA1 and CA2 0.1VCC ≤ VIN ≤ 0.9VCC (Note 9) See Test Circuit 2 See Test Circuit 2 See Test Circuit 2 Sink Current = 3mA VO = VIH(MIN) to VO = VIL(MAX), CB = 10pF to 400pF (Note 13) 2 0 0.4 250 50 1 10 400 10 V ns ns μA pF pF pF l 20+0.1CB l l l l l 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 DC Performance Resolution Monotonicity DNL INL Differential Nonlinearity Integral Nonlinearity (Note 3) Load Regulation ZSE VOS GE Zero-Scale Error Offset Error VOS Temperature Coefficient Gain Error Gain Temperature Coefficient l l CONDITIONS LTC2657-12 MIN TYP MAX 12 12 ±0.1 ±0.5 ±0.5 ±1 LTC2657B-16 MIN TYP MAX 16 16 ±0.3 ±2 0.6 1 ±1 2 ±0.02 ±0.1 1 ±1 ±4 2 3 ±2 UNITS Bits Bits LSB LSB LSB/mA mV mV μV/°C %FSR ppm/°C (Note 3) (Note 3) VCC = 5.5V, VREF = 2.5V VCC = 5V ±10%, Internal Reference, Mid-Scale, –15mA ≤ IOUT ≤ 15mA (Note 4) VREF = 2.048V l l l l l l 0.04 0.125 1 ±1 2 ±0.02 ±0.1 1 3 ±2 2657f 6 LTC2657 ELECTRICAL CHARACTERISTICS SYMBOL PARAMETER VOUT PSR ROUT DAC Output Span Power Supply Rejection DC Output Impedance 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) CONDITIONS Internal Reference External Reference = VEXTREF VCC ±10% VCC = 5V ±10%, Internal Reference, MidScale, –15mA ≤ IOUT ≤ 15mA Due to Full-Scale Output Change Due to Load Current Change Due to Powering Down (per Channel) VCC = 5.5V, VEXTREF = 2.8V Code: Zero-Scale, Forcing Output to VCC Code: Full-Scale, Forcing Output to GND l l l MIN TYP 0 to 4.096 0 to 2 • VEXTREF –80 0.04 MAX UNITS V V dB 0.15 Ω DC Crosstalk ±1.5 ±2 ±1 20 20 2.044 2.048 ±2 –80 l l μV μV/mA μV 65 65 2.052 ±10 5 200 mA mA V ppm/°C dB mA μA mV/mA nV/√Hz VCC/2 V μA pF 5.5 V mA mA μA 1 ISC Short-Circuit Output Current (Note 4) Reference Reference Output Voltage Reference Temperature Coefficient Reference Line Regulation Reference Short-Circuit Current REFCOMP Pin Short-Circuit Current Reference Load Regulation Reference Output Voltage Noise Density Reference Input Range Reference Input Current Reference Input Capacitance Power Supply VCC ICC ISD Digital I/O VIL VIH Low Level Input Voltage (SDA and SCL) High Level Input Voltage (SDA and SCL) VCC = 4.5V to 5.5V VCC = 4.5V to 5.5V See Test Circuit 1 See Test Circuit 1 See Test Circuit 2 See Test Circuit 2 See Test Circuit 2 Sink Current = 3mA l l l l l l l l l l (Note 7) C-Grade Only VCC ±10% VCC = 5.5V, Forcing REFIN/OUT to GND VCC = 5.5V, Forcing REFCOMP to GND VCC = 3V ±10% or 5V ±10%, IOUT = 100μA Sourcing CREFCOMP = CREFIN/OUT = 0.1μF at f = 1kHz External Reference Mode (Note 14) (Note 9) For Specified Performance VCC = 5V, Internal Reference On VCC = 5V, Internal Reference Off l l l l l l l 40 35 0.5 0.001 40 4.5 3.3 3 Positive Supply Voltage Supply Current (Note 8) 4.25 3.7 3 Supply Current in Shutdown Mode (Note 8) VCC = 5V 0.3VCC 0.7VCC 0.8V 2.4 0.15VCC 0.85VCC 10 10 2 0 0.4 V V V V V V kΩ kΩ MΩ V 2657f VIL(LDAC) Low Level Input Voltage (LDAC) VIH(LDAC) High Level Input Voltage (LDAC) VIL(CA) VIH(CA) RINH RINL RINF VOL Low Level Input Voltage (CA0 to CA2) High Level Input Voltage (CA0 to CA2) Resistance from CAn (n = 0,1, 2) to VCC to Set CAn = VCC Resistance from CAn (n = 0,1, 2) to GND to Set CAn = GND Resistance from CAn (n = 0,1, 2) to VCC or GND to Set CAn = FLOAT Low Level Ouput Voltage 7 LTC2657 ELECTRICAL CHARACTERISTICS SYMBOL PARAMETER tOF tSP IIN CIN CB CCAn Output Fall Time Pulse Width of Spikes Suppressed by Input Filter Input Leakage I/O Pin Capacitance Capacitance Load for Each Bus Line External Capacitive Load on Address Pins CA0, CA1 and CA2 0.1VCC ≤ VIN ≤ 0.9VCC (Note 9) 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) CONDITIONS VO = VIH(MIN) to VO = VIL(MAX), CB = 10pF to 400pF (Note 13) MIN l 20+0.1CB l l l l l TYP MAX 250 50 1 10 400 10 UNITS ns ns μA pF pF 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 AC Performance tS Settling Time (Note 10) Settling Time for 1LSB Step Voltage Output Slew Rate Capacitive Load Driving Glitch Impulse (Note 11) DAC-to-DAC Crosstalk (Note 12) Multiplying Bandwidth en Output Voltage Noise Density Output Voltage Noise At f = 1kHz At f = 10kHz 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) At Mid-Scale Transition, L-Option At Mid-Scale Transition, H-Option CREFCOMP = CREFIN/OUT = 0.22μF ±0.024% (±1LSB at 12 Bits) ±0.0015% (±1LSB at 16 Bits) ±0.024% (±1LSB at 12 Bits) ±0.0015% (±1LSB at 16 Bits) 3.9 9.1 2.4 4.5 1.8 1000 4 7 0.8 150 85 80 8 12 600 650 μs μs μs μs V/μs pF nV•s nV•s nV•s kHz nV/√Hz nV/√Hz μVP-P μVP-P μVP-P μVP-P CONDITIONS MIN TYP MAX UNITS 2657f 8 LTC2657 TIMING CHARACTERISTICS SYMBOL fSCL tHD(STA) tLOW tHIGH tSU(STA) tHD(DAT) tSU(DAT) tr tf tSU(STO) tBUF t1 t2 PARAMETER SCL Clock Frequency Hold Time (Repeated) Start Condition Low Period of the SCL Clock Pin High Period of the SCL Clock Pin Set-Up Time for a Repeated Start Program Data Hold Time Data Set-Up Time Rise Time of Both SDA and SCL Signals Fall Time of Both SDA and SCL Signals Set-Up Time for Stop Condition Bus Free Time Between a Stop and Start Condition Falling edge of the 9th Clock of the 3rd Input Byte to LDAC High or Low Transition LDAC Low Pulse Width VCC = 2.7V to 5.5V l l l l l l l l l l l l l 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). CONDITIONS MIN 0 0.6 1.3 0.6 0.6 0 100 20+0.1CB 20+0.1CB 0.6 1.3 400 20 300 300 0.9 TYP MAX 400 UNITS kHz μs μs μs μs μs ns ns ns μs μs ns 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 3 2 DNL (LSB) INL (LSB) 1 0 –1 –2 –3 –4 128 16384 32768 CODE 49152 65535 2657 G01 LTC2657-L16, TA = 25°C unless otherwise noted. Differential Nonlinearity (DNL) 1 VCC = 3V 4 3 0.5 INL (LSB) 2 INL vs Temperature VCC = 3V VCC = 3V INL (POS) 1 0 –1 –0.5 –2 –3 –1 128 16384 32768 CODE 49152 65535 2657 G02 0 INL (NEG) –4 –50 –30 –10 10 30 50 70 90 110 130 TEMPERATURE (°C) 2657 G03 DNL vs Temperature 1 VCC = 3V 1.253 1.252 DNL (POS) DNL (LSB) 0 DNL (NEG) 1.251 1.250 1.249 1.248 REFIN/OUT Output Voltage vs Temperature VCC = 3V 0.5 VREFIN/OUT (V) 3586 G35 –0.5 –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) 2657 G05 Settling to ±1LSB Rising SCL 3V/DIV 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 150μV/DIV 9μs 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 VOUT 100μV/DIV 8.6μs SCL 3V/DIV 9TH CLOCK OF 3RD DATA BYTE 2μs/DIV 2657 G07 2μs/DIV 2657 G08 2657f 10 LTC2657 TYPICAL PERFORMANCE CHARACTERISTICS Integral Nonlinearity (INL) 4 3 2 DNL (LSB) INL (LSB) 1 0 –1 –2 –3 –4 128 16384 32768 CODE 49152 65535 2657 G10 LTC2657-H16, TA = 25°C unless otherwise noted. Differential Nonlinearity (DNL) 1 VCC = 5V 4 3 0.5 2 INL (LSB) 1 0 –1 –0.5 –2 –3 –1 128 16384 32768 CODE 49152 65535 2657 G011 INL vs Temperature VCC = 5V VCC = 5V INL (POS) 0 INL (NEG) –4 –50 –30 –10 10 30 50 70 90 110 130 TEMPERATURE (°C) 3586 G35 DNL vs Temperature 1 VCC = 5V 2.054 2.052 0.5 DNL (LSB) DNL (POS) 0 DNL (NEG) –0.5 2.044 –1 –50 –30 –10 10 30 50 70 90 110 130 TEMPERATURE (°C) 2657 G13 REFIN/OUT Output Voltage vs Temperature VCC = 5V VREFIN/OUT (V) 2.050 2.048 2.046 2.042 –50 –30 –10 10 30 50 70 90 110 130 TEMPERATURE (°C) 2657 G14 Settling to ±1LSB Rising SCL 5V/DIV 9TH CLOCK OF 3RD DATA BYTE VOUT 250μV/DIV Settling to ±1LSB Falling 9.2μs 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 2μs/DIV 2657 G16 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 2657 G17 2657f 11 LTC2657 TYPICAL PERFORMANCE CHARACTERISTICS Integral Nonlinearity (INL) 1 VCC = 5V VREF = 2.048V 1 LTC2657-12, TA = 25°C unless otherwise noted. Differential Nonlinearity (DNL) VCC = 5V VREF = 2.048V Settling to ±1LSB 3/4 SCALE TO 1/4 SCALE STEP VCC = 3V, VFS = 2.5V RL = 2k, CL = 200pF AVERAGE OF 2048 EVENTS VOUT 500μV/DIV 0.5 DNL(LSB) INL(LSB) 0.5 0 0 3.5μs –0.5 –0.5 SCL 3V/DIV 9TH CLOCK OF 3RD DATA BYTE –1 8 1024 2048 CODE 3072 4095 2657 G19 –1 8 1024 2048 CODE 3072 4095 2657 G20 2μs/DIV 2657 G21 LTC2657 Load Regulation 10 8 6 4 ΔVOUT (mV) 2 0 –2 –4 –6 –8 –10 –50 –40 –30 –20 –10 0 10 20 30 40 50 IOUT (mA) 2657 G22 Current Limiting 0.20 5.0 VCC = 5V (LTC2657-H) VCC = 3V (LTC2657-L) INTERNAL REF. CODE = MID-SCALE VOUT (V) 4.5 4.0 3.5 3.0 2.5 2.0 1.5 –0.10 –0.15 –0.20 –50 –40 –30 –20 –10 0 10 20 30 40 50 IOUT (mA) 2657 G23 Headroom at Rails vs Output Current 5V SOURCING VCC = 5V (LTC2657-H) VCC = 3V (LTC2657-L) INTERNAL REF. CODE = MID-SCALE ΔVOUT (V) 0.15 0.10 0.05 0 3V SOURCING (LTC2657-L) –0.05 1.0 0.5 0 0 3V SINKING (LTC2657-L) 1 2 3 456 IOUT (mA) 7 5V SINKING 8 9 10 2657 G24 Offset Error vs Temperature 1 0.75 OFFSET ERROR (mV) 0.5 0.25 0 –0.25 –0.5 –0.75 –1 –50 –30 –10 10 30 50 70 90 110 130 TEMPERATURE (°C) 2657 G25 Zero-Scale Error vs Temperature 3 2.5 ZERO-SCALE ERROR (mV) 2 1.5 1 0.5 0 –50 –30 –10 10 30 50 70 90 110 130 TEMPERATURE (°C) 2657 G26 Gain Eror vs Temperature 64 48 32 GAIN ERROR (LSB) 16 0 –16 –32 –48 –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 2 1.5 OFFSET ERROR (mV) 1 GAIN ERROR (LSB) 0.5 0 – 0.5 –1 –1.5 –2 0.5 2 1 1.5 REFERENCE VOLTAGE (V) 2.5 2657 G28 LTC2657, TA = 25°C unless otherwise noted. Gain Error vs Reference Input 64 VCC = 5.5V 48 GAIN ERROR OF 8 CHANNELS 32 16 ICC (nA) 2 1 1.5 REFERENCE VOLTAGE (V) 0 –16 –32 –48 –64 0.5 2.5 2657 G29 ICC Shutdown vs VCC 450 400 350 300 250 200 150 100 50 0 2.5 3.0 3.5 4.0 VCC (V) 4.5 5.0 5.5 2657 G30 VCC = 5.5V GAIN ERROR OF 8 CHANNELS Supply Current vs Logic Voltage 4.0 VCC = 5V (LTC2657-H) SWEEP SCL, SDA BETWEEN OV AND VCC SUPPLY CURRENT (mA) 4.0 Supply Current vs Temperature 3 ICC Shutdown vs Temperature 3.6 3.5 ICC SHUTDOWN (μA) LTC2657-H VCC = 5V, CODE = MID-SCALE INTERNAL REFERENCE 3.0 2 ICC (mA) 3.2 2.8 2.5 1 LTC2657-H VCC = 5V LTC2657-L VCC = 3V 0 –50 –30 –10 10 30 50 70 90 110 130 TEMPERATURE (°C) 2657 G33 2.4 VCC = 3V (LTC2657-L) LTC2657-L VCC = 3V, CODE = MID-SCALE INTERNAL REFERENCE 2.0 0 1 2 3 LOGIC VOLTAGE (V) 4 5 2657 G31 2.0 –50 –30 –10 10 30 50 70 90 110 130 TEMPERATURE (°C) 2657 G32 Multiplying Bandwidth 8 6 4 AMPLITUDE (dB) 2 0 –2 –4 –6 –8 VCC = 5V VREF(DC) = 2V –10 VREF(AC) = 0.2VPP CODE = FULL-SCALE –12 1k 100k 10k FREQUENCY (Hz) VOUT 0.5V/DIV Large Signal Response SCL 5V/DIV Mid-Scale Glitch Impulse 9th CLOCK OF 3RD DATA BYTE VCC = 5V VREF = 2.048V ZERO SCALE TO FULL SCALE LTC2657-H16, VCC = 5V 7nV-s TYP VOUT 5mV/DIV LTC2657-L16, VCC = 3V 4nV-s TYP 1M 2657 G34 2μs/DIV 2657 G35 2μs/DIV 2657 G36 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 VCC 2V/DIV VOUT 0.5mV/DIV LTC2657-H16, VCC = 5V, 0.8nV • s TYP CREFCOMP = CREFOUT = 0.22μF VOUT 10mV/DIV ZERO-SCALE VOUT 1V/DIV 2μs/DIV 2657 G37 200μs/DIV 2657 G38 250μs/DIV 2657 G39 Noise Voltage Density vs Frequency 1200 1000 NOISE VOLTAGE (nV/√Hz) 800 600 400 LTC2657-H 200 0 1 LTC2657-L 10 100 1k 10k FREQUENCY (Hz) 100k 1M 5μV/DIV VCC = 5V CODE = MID-SCALE INTERNAL REF CREFCOMP = CREFOUT = 0.1μF DAC Output 0.1Hz to 10Hz Voltage Noise VCC = 5V, VFS = 2.5V CODE = MID-SCALE INTERNAL REF CREFCOMP = CREFOUT = 0.1μF Reference Output 0.1Hz to 10Hz Voltage Noise VREFOUT = 1.25V CREFCOMP = CREFOUT = 0.1μF 2μV/DIV 1 SEC/DIV 2657 G41 1 SEC/DIV 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