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LMP2231 Datasheet, PDF (1/20 Pages) National Semiconductor (TI) – Micropower, 1.8V, Precision Operational Amplifier with CMOS Inputs | |||
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February 7, 2008
LMP2231 Single
Micropower, 1.8V, Precision Operational Amplifier with
CMOS Inputs
General Description
The LMP2231 is a single micropower precision amplifier de-
signed for battery powered applications. The 1.8V to 5.0V
guaranteed supply voltage range and quiescent power con-
sumption of only 18 μW extend the battery life in portable
battery operated systems. The LMP2231 is part of the
LMP® precision amplifier family. The high impedance CMOS
input makes it ideal for instrumentation and other sensor in-
terface applications.
The LMP2231 has a maximum offset of 150 µV and maximum
offset voltage drift of only 0.4 µV/°C along with low bias cur-
rent of only ±20 fA. These precise specifications make the
LMP2231 a great choice for maintaining system accuracy and
long term stability.
The LMP2231 has a rail-to-rail output that swings 15 mV from
the supply voltage, which increases system dynamic range.
The common mode input voltage range extends 200 mV be-
low the negative supply, thus the LMP2231 is ideal for use in
single supply applications with ground sensing.
The LMP2231 is offered in 5-Pin SOT23 and 8-pin SOIC
packages.
The dual and quad versions of this product are also available.
The dual, LMP2232 is offered in 8-pin SOIC and MSOP. The
quad, LMP2234 is offered in 14-pin SOIC and TSSOP.
Features
(For VS = 5V, Typical unless otherwise noted)
â Supply current
10 µA
â Operating voltage range
1.6V to 5.5V
â Low TCVOS
±0.4 µV/°C (max)
â VOS
±150 µV (max)
â Input bias current
20 fA
â PSRR
120 dB
â CMRR
97 dB
â Open loop gain
120 dB
â Gain bandwidth product
130 kHz
â Slew rate
58 V/ms
â Input voltage noise, f = 1 kHz
60 nV/âHz
â Temperature range
â40°C to 125°C
Applications
â Precision instrumentation amplifiers
â Battery powered medical instrumentation
â High Impedance Sensors
â Strain gauge bridge amplifier
â Thermocouple amplifiers
Typical Application
Strain Gauge Bridge Amplifier
LMP® is a registered trademark of National Semiconductor Corporation.
© 2008 National Semiconductor Corporation 300338
30033874
www.national.com
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