仪表放大器应用工程师指南
第3版
www.analog.com/inamps
仪表放大器应用工程师指南
第
3
版
[美½Charles
Kitchin
和
Lew Counts
著
高光天
审译
Analog Devices , Inc.
i
All rights reserved. This publication, or parts thereof, may not be
reproduced in any form without permission of the copyright owner.
Information furnished by Analog Devices, Inc. is believed to be
accurate and reliable. However, no responsibility is assumed by
Analog Devices, Inc. for its use.
Analog Devices, Inc. makes no representation that the Interconnec-
ttion of its circuits as described herein will not infringe on existing
or future patent rights, nor do the descriptions contained herein
imply the granting of licenses to make, use, or sell equipment
constructed in accordance therewith.
Specifications and prices are subject to change without notice.
©2006 Analog Devices, Inc. Printed in U.S.A.
G02678–15–9/06(B)
Simplified Chinese language edition by Analog Devices, Inc.
Copyright © 2007
本书中文简½专有翻译出版权由
ADI
公司所有,
未经许可
不得以任½½式或手段复制或抄袭本书内容。
ii
目½
第
I
章-仪表放大器的基本原理
........................................................................................................................1-1
前言.........................................................................................................................................................................1-1
仪表放大器与运算放大器的区别是什么?
.......................................................................................................1-1
信号放大与
CMR ...............................................................................................................................................1-1
运算放大器与仪表放大器的
CMR
比较
.........................................................................................................1-3
差分放大器
...........................................................................................................................................................1-5
在½处½用仪表放大器和差分放大器?.............................................................................................................1-5
数据采集
….......................................................................................................................................................1-5
医用仪器
….......................................................................................................................................................1-6
监测和控制电子设备
.......................................................................................................................................1-6
½件编程方面的应用
.......................................................................................................................................1-6
音频方面的应用
…...........................................................................................................................................1-6
高速信号调理
...................................................................................................................................................1-6
视频方面的应用
…...........................................................................................................................................1-6
功率控制方面的应用
…...................................................................................................................................1-6
仪表放大器的外部特性
.......................................................................................................................................1-6
表征高品质仪表放大器的其它特性是什么?.....................................................................................................1-7
高
AC
(和
DC)
CMR ...........................................................................................................................................1-7
½失调电压和½失调电压漂移
.......................................................................................................................1-7
匹配的高输入阻抗
...........................................................................................................................................1-8
½输入偏½电流和½失调电流误差
...............................................................................................................1-8
½噪声
...............................................................................................................................................................1-8
½非线性
...........................................................................................................................................................1-8
增益选择方便
...................................................................................................................................................1-8
充裕的带½
.......................................................................................................................................................1-8
差分输入到单端输出的½换
...........................................................................................................................1-9
R-R
输入和输出
................................................................................................................................................1-9
电源与带½、
½换速率和噪声之间的关系
.....................................................................................................1-9
第
II
章一仪表放大器的内部原理
.....................................................................................................................2-1
单运放减法放大器提供的仪表放大器功½
.................................................................................................2-1
用输入缓冲器改进简单的减法放大器
...........................................................................................................2-1
三运放仪表放大器
…………….......................................................................................................................2-2
三运放仪表放大器设计考虑
...........................................................................................................................2-3
基本的双运放仪表放大器
...............................................................................................................................2-4
双运放仪表放大器——单电源工½共模电压设计考虑
...............................................................................2-5
第
III
章—单片仪表放大器
................................................................................................................................3-1
优于用运放构成的仪表放大器
...............................................................................................................3-1
采用仪表放大器还是差分放大器?.........
.......................................................................................................3-1
单片仪表放大器设计——内部原理
高性½仪表放大器
...........................................................................................................................................3-2
½成本仪表放大器
...........................................................................................................................................3-5
引脚可设½精密增益仪表放大器
...................................................................................................................3-6
自稳零仪表放大器
...........................................................................................................................................3-8
固定增益
(½漂移)
仪表放大器
.....................................................................................................................3-16
单电源仪表放大器
...................................................................................................................................3-17
½功耗、
单电源仪表放大器
...........................................................................................................................3-19
增益可设½仪表放大器
.................................................................................................................................3-20
第
IV
章—单片差分放大器
.................................................................................................................................4-1
差分放大器产品
.............................................................................................................................................4-1
AD8205
差分放大器
.........................................................................................................................................4-3
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