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仪表放大器应用工程师指南(AD)

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发表于 2008-6-25 22:22:28 | 显示全部楼层 |阅读模式

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目录如下,需要的兄弟自己下吧!

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
在何处使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
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么?.....................................................................................................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差 ...............................................................................................................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换 ...........................................................................................................................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理 ...................................................................................................................2-1
单运放减法器提供的仪表放大器功能 ...........................................................................................................2-1
用输入缓冲器改进简单减法器 .......................................................................................................................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——单电源共模电压制设计考虑 ...................................................................................2-5
自稳零仪表放大器 ..........................................................................................................................................2-6
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 ...................................................................................................................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
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巧 ...................................................................................................................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理 .......................................................................................................................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整流误差 ............................................................................................................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比 .............................................................................................................................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路 ...........................................................................................6-1
复合仪表放大器电路具有优良的高频CMR .......................................................................................................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
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测 .........................................................................................................................6-16
采用高端开关的高端电流检测 .........................................................................................................................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器 .............................................................................................................................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器 .............................................................................................................................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匹配 ..........................................................................................................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路 ...........................................................................................................7-6

仪表放大器应用工程师指南.pdf

2.87 MB, 下载次数: 357 , 下载积分: 资产 -2 信元, 下载支出 2 信元

发表于 2008-6-26 16:40:59 | 显示全部楼层
这么多阿,够我看一阵了。
发表于 2008-7-2 22:36:23 | 显示全部楼层
thanks very much
发表于 2008-7-5 20:44:24 | 显示全部楼层
THANK YOU
发表于 2009-3-13 11:44:30 | 显示全部楼层
hao dongxi a
发表于 2009-3-15 16:06:26 | 显示全部楼层
很想看一看!
发表于 2009-4-13 14:28:42 | 显示全部楼层
看啊看你eetop
发表于 2009-4-17 16:15:43 | 显示全部楼层

好东西

好东西  刚好我最近需要它
发表于 2009-5-11 23:56:19 | 显示全部楼层
不错,看一看
发表于 2009-7-13 21:22:48 | 显示全部楼层
楼主谢谢,这要用
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