LMP2234 Datasheet, PDF (1/20 Pages) National Semiconductor (TI) – Micropower, Precision, RRO Amplifier with CMOS Input

September 2007
LMP2234 Quad
Micropower, Precision, RRO Amplifier with CMOS Input
General Description
The LMP2234 is a quad micropower precision amplifier de-
signed for battery powered applications. The 1.8 to 5.5V
operating voltage range and quiescent power consumption of
only 62 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 instrumenta-
tion 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 (per channel)}
9 µA
■ ^{Low TCV}_OS
±1.0 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
■ ^{Rail-to-rail output}
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.
© 2007 National Semiconductor Corporation 202034
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