Datasheet AD7656, AD7657, AD7658 (Analog Devices) - 3
| Manufacturer | Analog Devices |
| Description | 250 kSPS, 6-Channel,SimultaneousSampling, Bipolar 12-Bit A/D Converter |
| Pages / Page | 32 / 3 — Data Sheet. AD7656/AD7657/AD7658. SPECIFICATIONS AD7656. Table 1. … |
| Revision | D |
| File Format / Size | PDF / 595 Kb |
| Document Language | English |
Data Sheet. AD7656/AD7657/AD7658. SPECIFICATIONS AD7656. Table 1. Parameter. B Version. Y Version. Unit. Test Conditions/Comments
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Data Sheet AD7656/AD7657/AD7658 SPECIFICATIONS AD7656
VREF = 2.5 V internal/external, AVCC = 4.75 V to 5.25 V, DVCC = 4.75 V to 5.25 V, VDRIVE = 2.7 V to 5.25 V; For ±4 × VREF range: VDD = 10 V to 16.5 V, VSS = −10 V to −16.5 V; For ±2 × VREF range: VDD = 5 V to 16.5 V, VSS = −5 V to −16.5 V; fSAMPLE = 250 kSPS, TA = TMIN to TMAX, unless otherwise noted.1
Table 1. Parameter B Version
1
Y Version
1
Unit Test Conditions/Comments
DYNAMIC PERFORMANCE fIN = 50 kHz sine wave Signal-to-Noise + Distortion (SINAD)2 84 84 dB min 85.5 85.5 dB typ Signal-to-Noise Ratio (SNR)2 85 85 dB min 86.5 86.5 dB typ Total Harmonic Distortion (THD)2 −90 −90 dB max −92 −92 dB typ VDD/VSS = ±5 V to ±10 V −100 −100 dB typ VDD/VSS = ±12 V to ±16.5 V Peak Harmonic or Spurious Noise (SFDR)2 −100 −100 dB typ Intermodulation Distortion (IMD)2 fa = 50 kHz, fb = 49 kHz Second-Order Terms −112 −112 dB typ Third-Order Terms −107 −107 dB typ Aperture Delay 10 10 ns max Aperture Delay Matching 4 4 ns max Aperture Jitter 35 35 ps typ Channel-to-Channel Isolation2 −100 −100 dB typ fIN on unselected channels up to 100 kHz Full Power Bandwidth 12 12 MHz typ @ −3 dB 2 2 MHz typ @ −0.1 dB DC ACCURACY Resolution 16 16 Bits No Missing Codes 15 14 Bits min 16 16 Bits min @ 25°C Integral Nonlinearity2 ±3 ±4.5 LSB max ±1 ±1 LSB typ Positive Full-Scale Error2 ±0.75 ±0.75 % FSR max ±0.22% FSR typical Positive Full-Scale Error Matching2 ±0.35 ±0.35 % FSR max Bipolar Zero-Scale Error2 ±0.023 ±0.023 % FSR max ±0.004% FSR typical Bipolar Zero-Scale Error Matching2 ±0.038 ±0.038 % FSR max Negative Full-Scale Error2 ±0.75 ±0.75 % FSR max ±0.22% FSR typical Negative Full-Scale Error Matching2 ±0.35 ±0.35 % FSR max ANALOG INPUT See Table 8 for min VDD/VSS for each range Input Voltage Ranges ±4 × VREF ±4 × VREF V RNG bit/RANGE pin = 0 ±2 × VREF ±2 × VREF V RNG bit/RANGE pin = 1 DC Leakage Current ±1 ±1 µA max Input Capacitance3 10 10 pF typ ±4 × VREF range when in track 14 14 pF typ ±2 × VREF range when in track REFERENCE INPUT/OUTPUT Reference Input Voltage Range 2.5/3 2.5/3 V min/max DC Leakage Current ±1 ±1 µA max Input Capacitance3 18.5 18.5 pF typ REFEN/DIS = 1 Reference Output Voltage 2.49/2.51 2.49/2.51 V min/max Long-Term Stability 150 150 ppm typ 1,000 hours Reference Temperature Coefficient 25 25 ppm/°C max 6 6 ppm/°C typ Rev. D | Page 3 of 32 Document Outline Features Applications Functional Block Diagram General Description Product Highlights Table of Contents Revision History Specifications AD7656 AD7657 AD7658 Timing Specifications Absolute Maximum Ratings Thermal Resistance ESD Caution Pin Configuration and Function Descriptions Typical Performance Characteristics Terminology Theory of Operation Converter Details Track-and-Hold Section Analog Input Section ADC Transfer Function Reference Section Typical Connection Diagram Driving the Analog Inputs Interface Section Parallel Interface (SER/ = 0) Software Selection of ADCs Changing the Analog Input Range (/S SEL = 0) Changing the Analog Input Range (/S SEL = 1) Serial Interface (SER/ = 1) Serial Read Operation Daisy-Chain Mode (DCEN = 1, SER/ = 1) Standby/Partial Power-Down Modes of Operation Application Hints Layout Power Supply Configuration Outline Dimensions Ordering Guide
Data Sheet AD7656/AD7657/AD7658 SPECIFICATIONS AD7656
VREF = 2.5 V internal/external, AVCC = 4.75 V to 5.25 V, DVCC = 4.75 V to 5.25 V, VDRIVE = 2.7 V to 5.25 V; For ±4 × VREF range: VDD = 10 V to 16.5 V, VSS = −10 V to −16.5 V; For ±2 × VREF range: VDD = 5 V to 16.5 V, VSS = −5 V to −16.5 V; fSAMPLE = 250 kSPS, TA = TMIN to TMAX, unless otherwise noted.1
Table 1. Parameter B Version
1
Y Version
1
Unit Test Conditions/Comments
DYNAMIC PERFORMANCE fIN = 50 kHz sine wave Signal-to-Noise + Distortion (SINAD)2 84 84 dB min 85.5 85.5 dB typ Signal-to-Noise Ratio (SNR)2 85 85 dB min 86.5 86.5 dB typ Total Harmonic Distortion (THD)2 −90 −90 dB max −92 −92 dB typ VDD/VSS = ±5 V to ±10 V −100 −100 dB typ VDD/VSS = ±12 V to ±16.5 V Peak Harmonic or Spurious Noise (SFDR)2 −100 −100 dB typ Intermodulation Distortion (IMD)2 fa = 50 kHz, fb = 49 kHz Second-Order Terms −112 −112 dB typ Third-Order Terms −107 −107 dB typ Aperture Delay 10 10 ns max Aperture Delay Matching 4 4 ns max Aperture Jitter 35 35 ps typ Channel-to-Channel Isolation2 −100 −100 dB typ fIN on unselected channels up to 100 kHz Full Power Bandwidth 12 12 MHz typ @ −3 dB 2 2 MHz typ @ −0.1 dB DC ACCURACY Resolution 16 16 Bits No Missing Codes 15 14 Bits min 16 16 Bits min @ 25°C Integral Nonlinearity2 ±3 ±4.5 LSB max ±1 ±1 LSB typ Positive Full-Scale Error2 ±0.75 ±0.75 % FSR max ±0.22% FSR typical Positive Full-Scale Error Matching2 ±0.35 ±0.35 % FSR max Bipolar Zero-Scale Error2 ±0.023 ±0.023 % FSR max ±0.004% FSR typical Bipolar Zero-Scale Error Matching2 ±0.038 ±0.038 % FSR max Negative Full-Scale Error2 ±0.75 ±0.75 % FSR max ±0.22% FSR typical Negative Full-Scale Error Matching2 ±0.35 ±0.35 % FSR max ANALOG INPUT See Table 8 for min VDD/VSS for each range Input Voltage Ranges ±4 × VREF ±4 × VREF V RNG bit/RANGE pin = 0 ±2 × VREF ±2 × VREF V RNG bit/RANGE pin = 1 DC Leakage Current ±1 ±1 µA max Input Capacitance3 10 10 pF typ ±4 × VREF range when in track 14 14 pF typ ±2 × VREF range when in track REFERENCE INPUT/OUTPUT Reference Input Voltage Range 2.5/3 2.5/3 V min/max DC Leakage Current ±1 ±1 µA max Input Capacitance3 18.5 18.5 pF typ REFEN/DIS = 1 Reference Output Voltage 2.49/2.51 2.49/2.51 V min/max Long-Term Stability 150 150 ppm typ 1,000 hours Reference Temperature Coefficient 25 25 ppm/°C max 6 6 ppm/°C typ Rev. D | Page 3 of 32 Document Outline Features Applications Functional Block Diagram General Description Product Highlights Table of Contents Revision History Specifications AD7656 AD7657 AD7658 Timing Specifications Absolute Maximum Ratings Thermal Resistance ESD Caution Pin Configuration and Function Descriptions Typical Performance Characteristics Terminology Theory of Operation Converter Details Track-and-Hold Section Analog Input Section ADC Transfer Function Reference Section Typical Connection Diagram Driving the Analog Inputs Interface Section Parallel Interface (SER/ = 0) Software Selection of ADCs Changing the Analog Input Range (/S SEL = 0) Changing the Analog Input Range (/S SEL = 1) Serial Interface (SER/ = 1) Serial Read Operation Daisy-Chain Mode (DCEN = 1, SER/ = 1) Standby/Partial Power-Down Modes of Operation Application Hints Layout Power Supply Configuration Outline Dimensions Ordering Guide
