Datasheet AD7903 (Analog Devices) - 4

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Data Sheet AD7903 SPECIFICATIONS
VDD = 2.5 V, VIO = 2.3 V to 5.5 V, VREF = 5 V, TA = −40°C to +125°C, unless otherwise noted.1
Table 2. Parameter Test Conditions/Comments Min Typ Max Unit
RESOLUTION 16 Bits ANALOG INPUT Voltage Range INx+ − INx− −VREF +VREF V Absolute Input Voltage INx+, INx− −0.1 VREF + 0.1 V Common-Mode Input Range INx+, INx− VREF × 0.475 VREF × 0.5 VREF × 0.525 V Analog Input CMRR fIN = 450 kHz 67 dB Leakage Current at 25°C Acquisition phase 200 nA Input Impedance See the Analog Inputs section ACCURACY No Missing Codes 16 Bits Differential Nonlinearity Error VREF = 5 V −1.0 ±0.4 +1.0 LSB2 VREF = 2.5 V ±0.7 LSB2 Integral Nonlinearity Error VREF = 5 V −2.0 ±0.5 +2.0 LSB2 VREF = 2.5 V ±0.4 LSB2 Transition Noise VREF = 5 V 0.75 LSB2 VREF = 2.5 V 1.2 LSB2 Gain Error3 TMIN to TMAX −0.04 ±0.006 +0.04 % FS Gain Error Temperature Drift 0.19 ppm/°C Gain Error Match3 TMIN to TMAX 0.0 0.025 % FS Offset Error3 TMIN to TMAX −0.5 ±0.015 +0.5 mV Offset Temperature Drift 0.3 ppm/°C Offset Error Match3 TMIN to TMAX 0.05 1.0 mV Power Supply Sensitivity VDD = 2.5 V ± 5% ±0.1 LSB2 THROUGHPUT Conversion Rate VIO ≥ 2.3 V up to 85°C, VIO ≥ 3.3 V 0 1 MSPS above 85°C, up to 125°C Transient Response Full-scale step 290 ns AC ACCURACY Dynamic Range VREF = 5 V 95.5 dB4 VREF = 2.5 V 92.5 dB4 Oversampled Dynamic Range fOUT = 10 kSPS 113.5 dB4 Signal-to-Noise Ratio (SNR) fIN = 1 kHz, VREF = 5 V 92 94 dB4 fIN = 1 kHz, VREF = 2.5 V 89 91 dB4 Spurious-Free Dynamic Range (SFDR) fIN = 1 kHz −115 dB4 Total Harmonic Distortion (THD) fIN = 1 kHz −112 dB4 Signal-to-(Noise + Distortion) (SINAD) fIN = 1 kHz, VREF = 5 V 91.5 93.5 dB4 fIN = 1 kHz, VREF = 2.5 V 88.5 90.5 dB4 Channel-to-Channel Isolation fIN = 10 kHz −120 dB4 1 In this data sheet, the voltages for the VDDx, VIOx, and REFx pins are indicated by VDD, VIO, and VREF, respectively. 2 With the 5 V input range, 1 LSB = 152.6 µV. With the 2.5 V input range, 1 LSB = 76.3 µV. 3 See the Terminology section. These specifications include full temperature range variation, but they do not include the error contribution from the external reference. 4 All specifications in decibels (dB) are referred to a ful -scale input FSR. Although these parameters are referred to ful scale, they are tested with an input signal at 0.5 dB below full scale, unless otherwise specified. Rev. B | Page 3 of 28 Document Outline Features Applications General Description Functional Block Diagram Table of Contents Revision History Specifications Timing Specifications Absolute Maximum Ratings ESD Caution Pin Configuration and Function Descriptions Typical Performance Characteristics Terminology Theory of Operation Circuit Information Converter Operation Transfer Functions Typical Connection Diagram Analog Inputs Driver Amplifier Choice Single-to-Differential Driver Voltage Reference Input Power Supply Digital Interface CS Mode CS Mode, 3-Wire Interface Without Busy Indicator CS Mode, 3-Wire Interface with Busy Indicator CS Mode, 4-Wire Interface Without Busy Indicator CS Mode, 4-Wire Interface with Busy Indicator Chain Mode Chain Mode Without Busy Indicator Chain Mode with Busy Indicator Applications Information Simultaneous Sampling Functional Safety Considerations Layout Evaluating Performance of the AD7903 Outline Dimensions Ordering Guide