Chapter 375

A two wire isolated and powered 10-bit data acquisition system

Guy Hoover and William Rempfer

Abstract

A two wire isolated and powered 10-bit data acquisition system is described.

Keywords

Data acquisition

10-bit data acquisition

LTC1092

Introduction

For reasons of safety or to eliminate error producing ground loops, it is often necessary to provide electrical isolation between measurement points and the microprocessor. Unfortunately, the isolated side of this measurement system must still be provided with power. One alternative is to power the isolated side of the circuit with batteries. This solution works if power consumption is low, environmental conditions are mild and the batteries are easily accessible. If these ...

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