LMP2231_0812 Datasheet, PDF (1/20 Pages) National Semiconductor (TI) – Micropower, 1.6V, Precision Operational Amplifier with CMOS Inputs

December 18, 2008
LMP2231 Single
Micropower, 1.6V, Precision Operational Amplifier with
CMOS Inputs
General Description
The LMP2231 is a single micropower precision amplifier de-
signed for battery powered applications. The 1.6V to 5.5V
operating supply voltage range and quiescent power con-
sumption of only 16 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 V_S = 5V, Typical unless otherwise noted)
■ ^{Supply current}
10 µA
■ ^{Operating voltage range}
1.6V to 5.5V
■ ^{Low TCV}_OS
±0.4 µV/°C (max)
■ ^V_OS
±150 µV (max)
■ ^{Input bias current}
20 fA
■ ^PSRR
120 dB
■ ^CMRR
97 dB
■ ^{Open loop gain}
120 dB
■ ^{Gain bandwidth product}
130 kHz
■ ^{Slew rate}
58 V/ms
■ ^{Input voltage noise, f = 1 kHz}
60 nV/√Hz
■ ^{Temperature range}
–40°C to 125°C
Applications
■ ^{Precision instrumentation amplifiers}
■ ^{Battery powered medical instrumentation}
■ ^{High Impedance Sensors}
■ ^{Strain gauge bridge amplifier}
■ ^{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