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AD8591SD

Operational Amplifiers Selection Guide

Analog Devices 

Analog Devices Provides Amplifiers for Every Application

Why are there so many different types of operational amplifiers (op amps)?

Here at Analog Devices our engineers continue the pursuit of the

illusive ideal op amp. And while we’re extremely close to its realization,

unfortunately it still exists only in textbooks. That is why we are committed

to offering such a broad portfolio of op amps to meet the many and varied

needs of our customers.

Selecting an op amp is no trivial task: with so many different types of

amplifiers, categories, architectures, and parameters to choose from, the

process can be difficult. Each customer and application requires slightly

different performance. It doesn’t matter whether you’re designing a coffee

maker (yes, op amps can be found in coffee makers) or the next generation

medical imaging system, Analog Devices has the right amplifier to meet

your needs.

This document will help you quickly and easily identify the right op

amp(s) for your application. Inside you’ll find a list of op amp terminology

and processes used to fabricate the ICs, a variety of selection tables,

application guides, design tools, and a handy detachable op amp reference

wall chart. We hope you’ll refer to this selection guide often and that it

provides you with a better understanding and appreciation of op amps

and their many applications.

Contents

Op Amp Glossary . . . . . . ............................................... 4

Amplifier Design Technology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Amplifier Process and Trimming Technology . . . . . . . . . . . . . . . . . . . . . . . . . 6

Quick Selection Guide—High Speed Amplifiers . . . . . . . . . . . . . . . . . . . . 7–8

Quick Selection Guide—Precision Amplifiers ..................... 9–11

Amplifier Selection Guide by Specifications

Precision Amplifiers (BW < 50 MHz)

Zero-Drift . . . . . . . . . . . . . . ....................................... ........ 15

Zero Input Crossover Distortion (ZCO) .......................... ........ 16

Overvoltage Protection (OVP)........................................... 17

Ultralow Offset Voltage (VOS # 250 mV Max) . . . . . . . . . . . . . . . . . . . . . . . . 18–19

Low Offset Voltage (VOS # 1 mV) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Low Power (IS/Amp# 1 mA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21–22

Low Noise (Vn # 10 nV/√Hz) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23–24

Low Input Bias Current (IB # 50 pA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25–26

Single Supply . . . . . . . . . . . .......................................... 27–28

Rail-to-Rail Output . . . . . . .......................................... 29–31

Rail-to-Rail Input/Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32–33

Low Cost . . . . . . . . . . . . . . ....................................... .... 34–35

High Speed Amplifiers (BW > 50 MHz)

Differential . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Low Noise/Low Distortion.................................... . . . . . . . . . . 37

Low Cost ................................................... . . . . . . . . . . 38

Rail-to-Rail Input/Output..................................... . . . . . . . . . . 39

FastFET (FET Input).......................................... . . . . . . . . . . 40

Current Feedback ........................................... . . . . . . . . . . 41

High Output Current ......................................... . . . . . . . . . . 42

High Supply Voltage ......................................... . . . . . . . . . . 43

Clamp ..................................................... . . . . . . . . . . . 44

Amplifier Selection Guide by Applications

Energy ..................................................... . . . . . . . . . . . 45

Process Control and Industrial Automation................... . . . . . . . . . . . 46

Instrumentation and Measurement ........................... . . . . . . . . . . 47

Motor and Power Control .................................... . . . . . . . . . . 48

Healthcare ................................................. . . . . . . . 49–50

Communications ...................................................... 51

Consumer Audio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

Automotive. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Defense and Aerospace ............................................ 54–57

Tools, Evaluation Boards, and Other Design Resources........... 58–62

Design Equations—Commonly Used Amplifier Configurations ..... 63–68

Packaging ........................................................ 69–70

www.analog.com/opamps | 3

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