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Analog Circuit Design Volume Three by John Hamburger, Bob Dobkin

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Chapter 488

An autoranging true RMS converter

Philip Karantzalis and Jim Mahoney

Abstract

An autoranging true RMS-to-DC converter is described.

Keywords

RMS-to-DC converter

autoranging

LTC1966

Introduction

The LTC1966 is a true RMS to DC converter that uses a Δimage computational technique to make it dramatically simpler to use, significantly more accurate, lower in power consumption and more flexible than conventional log-antilog RMS to DC converters. The LTC1966 RMS to DC converter has an input signal range from 5mVRMS to 1.5VRMS (a 50dB dynamic range with a single 5V supply rail) and a 3dB bandwidth of 800kHz with signal crest factors ...

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