The ADAS3022 is a complete 16-bit, 1 MSPS, successive approximation�based analog-to-digital data acquisition system that is manufactured on Analog Devices, Inc., proprietary iCMOS� high voltage industrial process technology. The device integrates an 8-channel, low leakage multiplexer; a high-impedance programmable gain instrumentation amplifier (PGIA) stage with a high common-mode rejection; a precision, low drift 4.096 V reference and buffer; and a 16-bit charge-redistribution analog-to-digital converter (ADC) with successive approximation register (SAR) architecture. The ADAS3022 can resolve eight single-ended inputs or four fully differential inputs up to �24.576 V when using �15 V supplies. In addition, the device can accept the commonly used bipolar differential, bipolar single-ended, pseudo bipolar, or pseudo unipolar input signals, as shown in Table 1, thus enabling the use of almost any direct sensor interface The ADAS3022 simplifies design challenges by eliminating signal buffering, level shifting, amplification/attenuation, common-mode rejection, settling time, or any of the other analog signal conditioning challenges while allowing smaller form factor, faster time to market, and lower costs.

Ease use--16-bit, 1 MSPS complete data acquisition system High impedance, 8-channel input: >500 M Differential input voltage range: �24.576 V maximum High input common-mode rejection: >100 dB User-programmable input ranges Channel sequencer with individual channel gains On-chip 4.096 V reference and buffer Auxiliary input--direct interface to PulSAR ADC inputs No latency or pipeline delay (SAR architecture) Serial 5 V SPI-/SPORT-compatible interface LFCSP package � 6 mm) to +85�C industrial temperature range

and buffer; and a 16-bit charge redistribution analog-to-digital converter (ADC) with successive approximation register (SAR) architecture. The ADAS3022 can resolve eight single-ended inputs or four fully differential inputs �24.576 V when using �15 V supplies. In addition, the device can accept the commonly used bipolar differential, bipolar single-ended, pseudo bipolar, or pseudo unipolar input signals, as shown in Table 1, thus enabling the use of almost any direct sensor interface. The ADAS3022 simplifies design challenges by eliminating signal buffering, level shifting, amplification/attenuation, common-mode rejection, settling time, and any other analog signal conditioning challenge while allowing a smaller form factor, faster time to market, and lower cost. Table 1. Typical Input Range Selection

Multichannel data acquisition and system monitoring Process control Power line monitoring Automated test equipment Instrumentation

The is a complete 16-bit, 1 MSPS, successive approximation�based analog-to-digital data acquisition system, which is manufactured on Analog Devices, Inc., proprietary iCMOS� high voltage industrial process technology. The device integrates an 8-channel, low leakage multiplexer; a high impedance programmable gain instrumentation amplifier (PGIA) stage with high common-mode rejection; a precision, low drift 4.096 V reference

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Features.............................................................................................. 1 Applications....................................................................................... 1 General Description......................................................................... 1 Functional Block Diagram.............................................................. 1 Revision History............................................................................... 2 Specifications..................................................................................... 3 Timing Specifications.................................................................. 7 Absolute Maximum Ratings............................................................ 9 ESD Caution.................................................................................. 9 Pin Configuration and Function Descriptions........................... 10 Typical Performance Characteristics........................................... 12 Terminology.................................................................................... 19 Theory of Operation...................................................................... 21 Overview...................................................................................... 21 ADAS3022 Operation................................................................. 21 Transfer Function....................................................................... 22

Typical Application Connection Diagram.............................. 23 Analog Inputs.............................................................................. 24 Voltage Reference Output/Input.............................................. 27 Power Supply............................................................................... 28 Conversion Modes..................................................................... 29 Digital Interface.............................................................................. 30 Conversion Control................................................................... 30 Reset and Power-Down (PD) Inputs....................................... 30 Serial Data Interface................................................................... 31 General Considerations............................................................. 32 General Timing........................................................................... 33 Configuration Register.............................................................. 35 Channel Sequencer Details....................................................... 36 Outline Dimensions....................................................................... 38 Ordering Guide.......................................................................... 38

VDDH � 5%, VSSH � 5%, AVDD = DVDD 5%, VIO V to AVDD, internal reference, VREF = 1 MSPS. All specifications TMIN to TMAX, unless otherwise noted. Table 2.

Parameter RESOLUTION ANALOG INPUTS--IN[7:0], COM Operating Input Voltage Range Differential Input Voltage Range, VIN Test Conditions/Comments Min 16 -VSSH �0.6 �0.02 VIN+, VIN-; full-scale differential inputs PGIA gain = 0.4 PGIA gain = 0.8 PGIA gain = 1.6 PGIA gain = 3.2 PGIA gain -VREF One channel/one pair Two channels/two pairs Four channels/four pairs Eight channels Full-scale step +VREF Typ Max Unit 1 Bits nA kSPS ns Bits LSB ppm/�C LSB

VIN VIN+ - VIN- PGIA gain = 0.16, VIN 49.15 V p-p PGIA gain = 0.2, VIN 40.96 V p-p PGIA gain = 0.4, VIN 20.48 V p-p PGIA gain = 0.8, VIN 10.24 V p-p PGIA gain = 1.6, VIN 5.12 V p-p PGIA gain = 3.2, VIN 2.56 V p-p PGIA gain = 6.4, VIN 1.28 V p-p

PGIA gain PGIA gain = 3.2 PGIA gain = 6.4 PGIA gain PGIA gain = 3.2 PGIA gain = 6.4 External reference PGIA gain PGIA gain = 3.2 PGIA gain = 6.4 External reference, all PGIA gains External reference, all PGIA gains External reference, = 25�C PGIA gain PGIA gain = 1.6 PGIA gain = 3.2 PGIA gain = 6.4

Feature

Applications

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