1FEATURES
23(For VS = 5V, TA = 25°C, Typical Unless
Otherwise Noted)
• Supply Current 10 μA
• Operating Voltage Range 1.6V to 5.5V
• TCV OS (LMP2231A) ±0.4 μV/°C (max)
• TCVOS (LMP2231B) ±2.5μV/°C (max)
• VOS ±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

DESCRIPTION
The LMP2231 is a single micropower precision
amplifier designed for battery powered applications.
The 1.6V to 5.5V operating supply voltage range and
quiescent power consumption 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 interface
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 current 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 below the negative supply,
thus the LMP2231 is ideal for use in single supply
applications with ground sensing.
The LMP2231 is offered in 5-Pin SOT-23 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 VSSOP. The quad, LMP2234 is offered in
14-pin SOIC and TSSOP.