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Using Op Amps as Comparators (...

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Using Op Amps as ComparatorsAN-849 APPLICATION NOTE
One Technology Way P.O. Box 9106 Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 Fax: 781.461.3113 www.analog.com

Using Op Amps as Comparators
by James Bryant

INTRODUCTION
A comparator is a device with two input terminals, inverting and noninverting, and an output that usually swings from rail to rail. So is an op amp.
V+ V+

But it is tempting to use op amps as comparators for a number of reasons. The remainder of this document summarizes the reasons and warns of possible unexpected consequences of using an op amp as a comparator.

WHY USE AN OP AMP AS A COMPARATOR?

06125-001

Convenience Economy Low IB
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Using Op Amps as Comparators (...
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