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LMP7731

更新时间: 2024-11-05 02:58:15
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德州仪器 - TI /
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26页 1032K
描述
2.9 nV/sqrt(Hz) Low Noise, Precision, RRIO Amplifier

LMP7731 数据手册

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LMP7731  
www.ti.com  
SNOSAT6E JULY 2007REVISED MARCH 2013  
2.9 nV/sqrt(Hz) Low Noise, Precision, RRIO Amplifier  
Check for Samples: LMP7731  
1
FEATURES  
DESCRIPTION  
The LMP7731 is a single, low noise, rail-to-rail input  
and output, low voltage amplifier. The LMP7731 is  
part of the LMP™ precision amplifier family and is  
ideal for precision and low noise applications with low  
voltage requirements.  
23  
(Typical Values, TA = 25°C, VS = 5V)  
Input Voltage Noise  
f = 3 Hz 3.3 nV/Hz  
f = 1 kHz 2.9 nV/Hz  
CMRR 130 dB  
This operational amplifier offers low voltage noise of  
2.9 nV/Hz with a 1/f corner of only 3 Hz. The  
LMP7731 has bipolar input stages with a bias current  
of only 1.5 nA. This low input bias current,  
complemented by the very low level of voltage noise,  
makes the LMP7731 an excellent choice for  
photometry applications.  
Open Loop Gain 130 dB  
GBW 22 MHz  
Slew Rate 2.4 V/µs  
THD @ f = 10 kHz, AV = +1, RL = 2 k0.001%  
Supply Current per Channel 2.2 mA  
Supply Voltage Range 1.8V to 5.5V  
Operating Temperature Range 40°C to 125°C  
Input Bias Current ±1.5 nA  
RRIO  
The LMP7731 provides a wide GBW of 22 MHz while  
consuming only 2 mA of current. This high gain  
bandwidth along with the high open loop gain of 130  
dB enables accurate signal conditioning in  
applications with high closed loop gain requirements.  
The LMP7731 has a supply voltage range of 1.8V to  
5.5V, making it an ideal choice for battery operated  
portable applications.  
APPLICATIONS  
Gas Analysis Instruments  
Photometric Instrumentation  
Medical Instrumentation  
The LMP7731 is offered in the space saving 5-Pin  
SOT-23 and 8-Pin SOIC packages.  
Typical Performance Characteristics  
Input Voltage Noise  
Input Current Noise  
vs.  
vs.  
Frequency  
Frequency  
100  
100  
V
= 2.5V, 3.3V, 5V  
V = 2.5V, 3.3V, 5V  
S
S
V
= 0.5V  
CM  
10  
10  
V
= 0.5V  
CM  
V
= 2.5V  
1
CM  
V
= 2.5V  
CM  
1
1
0.1  
1
0.1  
100  
100  
10  
1k  
10k  
10  
1k  
10k  
FREQUENCY (Hz)  
FREQUENCY (Hz)  
Figure 1.  
Figure 2.  
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas  
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
2
3
LMP is a trademark of Texas Instruments.  
All other trademarks are the property of their respective owners.  
PRODUCTION DATA information is current as of publication date.  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
Copyright © 2007–2013, Texas Instruments Incorporated  

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