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LMP8100 PDF预览

LMP8100

更新时间: 2024-11-04 03:51:43
品牌 Logo 应用领域
美国国家半导体 - NSC 放大器
页数 文件大小 规格书
30页 1380K
描述
Programmable Gain Amplifier

LMP8100 数据手册

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July 2007  
LMP8100  
Programmable Gain Amplifier  
General Description  
Features  
The LMP8100 programmable gain amplifier features an ad-  
justable gain from 1 to 16 V/V in 1 V/V increments. At the core  
of the LMP8100 is a precision, 33 MHz, CMOS input, rail-to-  
rail input/output operational amplifier with a typical open-loop  
gain of 110 dB. Amplifier closed-loop gain is set by an array  
of precision thin-film resistors. Amplifier control modes are  
programmed via a serial port that allows devices to be cas-  
caded so that an array of LMP8100 amplifiers can be pro-  
grammed by a single serial data stream. The control mode  
registers are double buffered to insure glitch-free transitions  
between programmed settings. The LMP8100 is part of the  
LMP® precision amplifier family and is ideal for a variety of  
applications.  
Typical Values, TA = 25°C  
Gain error (over temperature range)  
LMP8100A  
LMP8100  
Gain range  
0.03%  
0.075%  
1 to 16 V/V in 1 V/V steps  
Programmable frequency compensation  
Input zero calibration switch  
Input offset voltage (max, LMP8100A)  
Input bias current  
Input noise voltage  
Unity gain bandwidth  
Slew rate  
Output current  
Supply voltage range  
Supply current  
250 μV  
0.1 pA  
12 nV/Hz  
33 MHz  
12 V/μs  
20 mA  
2.7V to 5.5V  
The amplifier features several programmable controls includ-  
ing: gain; a power-conserving shutdown mode which can  
reduce current consumption to only 20 μA; an input zeroing  
switch which allows the output offset voltage to be measured  
to facilitate system calibration; and four levels of internal fre-  
quency compensation which can be set to maximize band-  
width at the different gain settings.  
5.3 mA  
V+ −50 mV to V+50 mV  
Rail-to-Rail output swing  
Applications  
Industrial instrumentation  
The LMP8100 comes in a 14-Pin SOIC package.  
Data acquisition systems  
Test equipment  
Scaling amplifier  
Gain control  
Sensor interface  
Simplified Block Diagram  
20147607  
LMP® is a registered trademark of National Semiconductor Corporation.  
© 2007 National Semiconductor Corporation  
201476  
www.national.com  

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