This TI verified design implements a 16-bit differential 4-channel multiplexed data acquisition system at 400 KSPS throughput for high voltage differential inputs for ±20 V (40 Vpk-pk) industrial applications. The circuit is implemented with a 16-bit successive approximation register (SAR) analog-to-digital converter (ADC), a precision high-voltage signal conditioning front end, and a 4-channel differential multiplexer (MUX). This design details the use of the OPA192 and OPA140 to optimize a precision high-voltage front-end driver circuit to achieve the excellent dynamic performance of the ADS8864 .
Blockdiagram
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