仪表放大器应用工程师指南（ADI公司）

wangabby

仪表放大器应用工程师指南（ADI公司）：中文是第二版，英文是第三版
很地道的资料。
目录
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？.........................................................................................................1-1
信号放大与CMR .............................................................................................................................................1-1
运算放大器与仪表放大器的CMR比 ..........................................................................................................1-3
差分放大器 .........................................................................................................................................................1-5
在何处使用仪表放大器和差分放大？.............................................................................................................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
软件编程方面的应用 .....................................................................................................................................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？.....................................................................................................1-7
高AC（和DC）CMR ..........................................................................................................................................1-7
低失调电压和低失调电压漂移 .....................................................................................................................1-7
匹配的高输入阻抗 .........................................................................................................................................1-8
低输入偏置电流和低失调电流误 ...............................................................................................................1-8
低噪声 .............................................................................................................................................................1-8
低非线性...........................................................................................................................................................1-8
增益选择方便 .................................................................................................................................................1-8
充裕的带宽.......................................................................................................................................................1-8
差分输入到单端输出的转 ...........................................................................................................................1-9
R-R输入和输出 ..............................................................................................................................................1-9
电源与带宽、转换速率和噪声之间的关系 ....................................................................................................1-9
第Ⅱ章——仪表放大器的内部原 ...................................................................................................................2-1
单运放减法器提供的仪表放大器功 ...........................................................................................................2-1
用输入缓冲器改进简单减法 .......................................................................................................................2-1
三运放仪表放大器 .........................................................................................................................................2-2
三运放仪表放大器设计考 ...........................................................................................................................2-3
基本的双运放仪表放大 ...............................................................................................................................2-4
双运放仪表放大器——单电源共模电压制设计考 ...................................................................................2-5
自稳零仪表放大器 .........................................................................................................................................2-6
第Ⅲ章——单片仪表放大 ...............................................................................................................................3-1
优于用运放构成的仪表放大 .......................................................................................................................3-1
采用仪表放大器还是差分放大？ ...............................................................................................................3-1
单片仪表放大器设计——内部原 ...................................................................................................................3-2
高性能仪表放大器 .........................................................................................................................................3-2
固定增益仪表放大器 .....................................................................................................................................3-7
低成本仪表放大器 .........................................................................................................................................3-8
单电源仪表放大器 .........................................................................................................................................3-8
低功耗、单电源仪表放大器 ..........................................................................................................................3-11



iii 第Ⅳ章——单片差分放大器 ..........................................................................................................................4-1
差分（减法器）放大器 ....................................................................................................................................4-1
高频差分（接收器）放大器 ...............................................................................................................................4-6

第Ⅴ章——仪表放大器的应用技 ...................................................................................................................5-1

双电源工作 .....................................................................................................................................................5-1

单电源工作 ......................................................................................................................................................5-1

电源旁路、解耦和稳定性问题 .........................................................................................................................5-1

输入接地返回的重要性 ..................................................................................................................................5-1
AC 输入耦合 .................................................................................................................................................5-2

阻容元件匹配 .................................................................................................................................................5-2

电缆终端 ..............................................................................................................................................................5-3

仪表放大器的输入保护基本原 .......................................................................................................................5-3

防ESD和DC过载的输入保护 ..........................................................................................................................5-3

用外接二极管对输入保护 ...............................................................................................................................5-5

防ESD和瞬态过载的输入保护 .......................................................................................................................5-5

影响DC精度的设计问题 ...................................................................................................................................5-6

对最低限失调电压漂移的设计 .......................................................................................................................5-6

对最低限增益漂移的设计 ...............................................................................................................................5-6

实际解决方案 .................................................................................................................................................5-7

方案1：采用优质的增益电阻器 .......................................................................................................................5-7

方案2：采用固定增益的仪表放大器 ...............................................................................................................5-7
RTI和RTO误差 .................................................................................................................................................5-7

失调误差 .........................................................................................................................................................5-8

噪声误差 ..........................................................................................................................................................5-8

降低仪表放大器电路中的RFI整流误 ............................................................................................................5-8

设计实用的RFI滤波器 ...................................................................................................................................5-8

用食谱式方法选择RFI ...........................................................................................................5-10
具体的设计案例 ...........................................................................................................................................5-10

用于AD620系列仪表放大器的RFI抑制电路 ...............................................................................................5-10

用于微功耗仪表放大器的 RFI 抑制电路 .....................................................................................................5-11

用于AD623仪表放大器的RFI抑制电路 .......................................................................................................5-12

用于AD8225仪表放大器的RFI抑制电路 .....................................................................................................5-12

采用X2Y电容器的共模滤波器 .....................................................................................................................5-13

用于仪表放大器RFI滤波器的共模 RF扼流圈 ............................................................................................5-14
RFI测试 ............................................................................................................................................................5-15

采用低通滤波器提高信噪 .............................................................................................................................5-15

外部调整CMR和建立时间 ...............................................................................................................................5-17

第Ⅵ章——仪表放大器与差分放大器的应用电 ...........................................................................................6-1

复合仪表放大器电路具有优良的高频MR .......................................................................................................6-1

采用AC激励的应变计测量 ...............................................................................................................................6-2
AD628精密增益IC的应用 .................................................................................................................................6-3

为什么使用一种增益IC ？..............................................................................................................................6-3

具有单极点LP滤波器的标准差分输入ADC缓冲器 ......................................................................................6-4

改变输出比例系数 .........................................................................................................................................6-4

用一只外部电阻器设置AD628的0.1以下增益 ..............................................................................................6-4

具有双极点LP滤波的差分输入电路 ..............................................................................................................6-5

用AD628构成精密增益IC ..............................................................................................................................6-6

用AD628接成＋10或者－10精密增益 ...........................................................................................................6-6

用AD628接成＋11精密增益 .........................................................................................................................6-7

用AD628接成＋1精密增益.............................................................................................................................6-8

用前馈增加带宽提供－9.91增益 ....................................................................................................................6-8

iv 用试选法选择RFI滤波器元件值 ...................................................................................................................5-10
电流变送器抑制接地噪声 .................................................................................................................................6-9
高幅度模拟输入ADC接口 ...............................................................................................................................6-10
高速同相求和放大器 .......................................................................................................................................6-11
高电压监测电路 ...............................................................................................................................................6-13
单电源高CMR电路 .........................................................................................................................................6-13
48V总线精密监测电路 ....................................................................................................................................6-15
采用低端开关的高端电流检 .........................................................................................................................6-16
采用高端开关的高端电流检 .........................................................................................................................6-17
电桥应用 ...........................................................................................................................................................6-17
标准电桥电路 ...............................................................................................................................................6-17
单电源数据采集系统 ...................................................................................................................................6-18
低压降双极性电桥驱动 .............................................................................................................................6-18
传感器接口的应用 ...........................................................................................................................................6-19
医用心电图仪的应用 .......................................................................................................................................6-19
远程负载检测技术 ...........................................................................................................................................6-21
精密电压电流转换器 .......................................................................................................................................6-22
电流传感器接口 ...............................................................................................................................................6-22
输出缓冲低功耗仪表放大 .............................................................................................................................6-23
4 mA～20 mA单电源接收器 ............................................................................................................................6-23
单电源热电偶放大器 .......................................................................................................................................6-24
专业音频产品 ...................................................................................................................................................6-24
第Ⅶ章——仪表放大器与现代ADC匹 ..........................................................................................................7-1
计算对ADC分辨率的要求 ..............................................................................................................................7-1
ADI公司仪表放大器与现代ADC匹配 ...........................................................................................................7-2
高速数据采集 .................................................................................................................................................7-4
用于高速数据采集的仪表放大器电 ...........................................................................................................7-6
附录A ——仪表放大器技术指 ......................................................................................................................A-1
附录B ——差分放大器和仪表放大器选择表 .................................................................................................B-1

[ 本帖最后由 wangabby 于 2009-3-14 09:22 编辑 ]

莺歌燕舞

刚才大致浏览一下，很经典的，多谢楼主

budisinata

謝謝無私提供這份資料

zheng_rs

好。。。。

lizpmemory

xiexie

lixqing

Thanks.

haibinlus

got it. Thanks!

tommy_8353

不错，好东西！

zyl_zcy

好东西

tang_003

了解一下