Datasheet AD7701 (Analog Devices) - 3

AD7701–SPECIFICATIONS (TA = 25 C; AVDD = DVDD = +5 V; AVSS = DVSS = –5 V; VREF = +2.5 V; fCLKIN = 4.096 MHz; Bipolar Mode: MODE = +5 V; AIN Source Resistance = 1k 1 with 1 nF to AGND at AIN; unless otherwise noted.) Parameter A, S Version2 B, T Version2 Unit Test Conditions/Comments
STATIC PERFORMANCE Resolution 16 16 Bits Integral Nonlinearity TMIN to TMAX ±0.0007 % FSR typ ±0.003 ±0.0015 % FSR max Differential Nonlinearity T ± MIN to TMAX 0.125 ±0.125 LSB typ Guaranteed No Missing Codes ±0.5 ±0.5 LSB max Positive Full-Scale Error3 ±0.13 ±0.13 LSB typ ±0.5 ±0.5 LSB max Full-Scale Drift4 ±1.2 (±2.3 S Version) ±1.2 (±2.3 T Version) LSB typ Unipolar Offset Error3 ±0.25 ±0.25 LSB typ ±1 ±1 LSB max Unipolar Offset Drift4 ±1.6 (+3/–25 S Version) ±1.6 (+3/–25 T Version) LSB typ Bipolar Zero Error3 ±0.25 ±0.25 LSB typ ±1 ± 1 LSB max Bipolar Zero Drift4 ±0.8 (+1.5/–12.5 S Version) ±0.8 (+1.5/–12.5 T Version) LSB typ Bipolar Negative Full-Scale Error3 ±0.5 ±0.5 LSB typ ±2 ±2 LSB max Bipolar Negative Full-Scale Drift4 ±0.6 (±1.2 S Version) ±0.6 (±1.2 T Version) LSB typ Noise (Referred to Output) 0.1 0.1 LSB rms typ DYNAMIC PERFORMANCE Sampling Frequency, fS fCLKIN/256 fCLKIN/256 Hz Output Update Rate, fOUT fCLKIN/1024 fCLKIN/1024 Hz Filter Corner Frequency, f–3 dB fCLKIN/409,600 fCLKIN/409,600 Hz Settling Time to ± 0.0007% FS 507904/fCLKIN 507904/fCLKIN sec For Full-Scale Input Step SYSTEM CALIBRATION Applies to unipolar and Positive Full-Scale Overrange VREF + 0.1 VREF + 0.1 V max bipolar ranges. After cali- Positive Full-Scale Overrange VREF + 0.1 VREF + 0.1 V max bration, if AIN > VREF, the Negative Full-Scale Overrange –(VREF + 0.1) –(VREF + 0.1) V max device will output all 1s. Maximum Offset Calibration Range5, 6 If AIN < 0 (unipolar) or Unipolar Input Range –(VREF + 0.1) –(VREF + 0.1) V max –VREF (bipolar), the device Bipolar Input Range –0.4 VREF to +0.4 VREF –0.4 VREF to +0.4 VREF V max will output all 0s. Input Span7 0.8 VREF 0.8 VREF V min 2 VREF + 0.2 2 VREF + 0.2 V max ANALOG INPUT Unipolar Input Range 0 to 2.5 0 to 2.5 V Bipolar Input Range ±2.5 ±2.5 V Input Capacitance 10 10 pF typ Input Bias Current1 1 1 nA typ LOGIC INPUTS All Inputs Except CLKIN VINL, Input Low Voltage 0.8 0.8 V max VINH, Input High Voltage 2.0 2.0 V min CLKIN VINL, Input Low Voltage 0.8 0.8 V max VINH, Input High Voltage 3.5 3.5 V min IIN, Input Current 10 10 µA max LOGIC OUTPUTS VOL, Output Low Voltage 0.4 0.4 V max ISINK = 1.6 mA VOH, Output High Voltage DVDD – 1 DVDD – 1 V min ISOURCE = 100 µA Floating State Leakage Current ±10 ±10 µA max Floating State Output Capacitance 9 9 pF typ –2– REV. E Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAM PRODUCT HIGHLIGHTS SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS ORDERING GUIDE PIN CONFIGURATIONS PIN FUNCTION DESCRIPTIONS TIMING CHARACTERISTICS DEFINITION OF TERMS Linearity Error Differential Linearity Error Positive Full-Scale Error Unipolar Offset Error Bipolar Zero Error Bipolar Negative Full-Scale Error Positive Full-Scale Overrange Negative Full-Scale Overrange Offset Calibration Range Full-Scale Calibration Range Input Span GENERAL DESCRIPTION THEORY OF OPERATION DIGITAL FILTERING FILTER CHARACTERISTICS USING THE AD7701 SYSTEM DESIGN CONSIDERATIONS CLOCKING ANALOG INPUT RANGES INPUT SIGNAL CONDITIONING Source Resistance Antialias Considerations VOLTAGE REFERENCE CONNECTIONS GROUNDING AND SUPPLY DECOUPLING ACCURACY AND AUTOCALIBRATION CALIBRATION RANGE POWER-UP AND CALIBRATION POWER SUPPLY SEQUENCING GROUNDING SINGLE-SUPPLY OPERATION SLEEP MODE DIGITAL INTERFACE Synchronous Self-Clocking Mode (SSC) Synchronous External Clock Mode (SEC) Asynchronous Communications (AC) Mode DIGITAL NOISE AND OUTPUT LOADING OUTLINE DIMENSIONS Revision History