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Analog Circuit Design Volume Three by John Hamburger, Bob Dobkin

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Chapter 401

A single supply RS232 interface for bipolar A to D converters

Sean Gold

Abstract

A single supply RS232 interface for bipolar analog-to-digital converters is described.

Keywords

RS232 interface

bipolar ADC

LT1180

LTC1294

Designing circuitry for single supply operation is often an attractive simplification for reducing production costs. Yet many applications call for just a few additional supplies to solve simple interface problems. The example presented here describes how an advanced RS232 interface can simplify an A to D converter which processes bipolar signals.

The LT1180 RS232 transceiver includes a charge pump which produces low ripple supplies with sufficient surplus current to drive a CMOS A to D converter and precision ...

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