Chapter 472

SOT-23 micropower, rail-to-rail op amps operate with inputs above the positive supply

Raj Ramchandani

Abstract

SOT-23 micropower, rail-to-rail operational amplifiers that operate with inputs above the positive supply are described.

Keywords

SOT-23 operational amplifier

Over-The-Top

LT1782

LT1783

Introduction

The only SOT-23 op amps featuring Over-The-Top operation—the ability to operate with either or both inputs above the positive rail—are the 55μA LT1782 and the 300μA LT1783. This feature is important in many current-sensing applications, where the inputs are required to operate at or above the supply. The wide supply voltage range, from 2.7V to 18V, gives the LT1782/LT1783 broad appeal as general purpose amplifiers, ...

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