LMP2234_0812 Datasheet, PDF (1/20 Pages) National Semiconductor (TI) – Micropower, 1.6V, Precision, Operational Amplifier with CMOS Input

December 18, 2008
LMP2234 Quad
Micropower, 1.6V, Precision, Operational Amplifier with
CMOS Input
General Description
The LMP2234 is a quad micropower precision amplifier de-
signed for battery powered applications. The 1.6 to 5.5V
operating supply voltage range and quiescent power con-
sumption of only 50 μW extend the battery life in portable
systems. The LMP2234 is part of the LMP^® precision amplifier
family. The high impedance CMOS input makes it ideal for
instrumentation and other sensor interface applications.
The LMP2234 has a maximum offset voltage of 150 μV and
0.3 μV/°C offset drift along with low bias current of only
±20 fA. These precise specifications make the LMP2234 a
great choice for maintaining system accuracy and long term
stability.
The LMP2234 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 LMP2234 is ideal for ground
sensing in single supply applications.
The LMP2234 is offered in 14-Pin SOIC and TSSOP pack-
ages.
Features
(For V_S = 5V, Typical unless otherwise noted)
■ ^{Supply current at 1.8V}
31 µA
■ ^{Operating voltage range}
1.6V to 5.5V
■ ^{Low TCV}_OS
±0.75 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.
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