National LMP8272, LMP8277 Data Sheet
Summary
Precision differential amplifiers, like the LMP8272 and LMP8277, are engineered for amplifying small signals with exceptionally high Common Mode Rejection Ratio (CMRR). Featuring a fixed gain of 14 and an extended common-mode voltage range (-5V to 36V), these devices are crucial for reliable signal detection in demanding environments. This manual provides comprehensive technical specifications, performance data, and usage guidelines essential for electrical engineers designing systems such as automotive sensing, current monitoring, and advanced power management circuits.
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PRELIMINARY
LM 8272,LM igh om on ode,G ain of 14,P recision Voltage ifference plifiers
January
LMP8272, LMP8277 High Common Mode, Gain of 14, Precision Voltage Difference Amplifiers General Description Features
The LMP™8272, LMP8277 are fixed gain differential ampli- Typical Values, TA 25˚C fiers with -2V to 27V input common mode voltage range Input Offset Voltage 1m V max
and supply voltage range of 4.5V to 5.5V. The LMP8272, TCVos (LMP8272) 15µV/˚C max LMP8277 are precision amplifiers which will detect, amplify
TCVos (LMP8277) 30µV/˚C max
and filter small differential signals in the presence of high
CMRR 80d B Min
common mode voltages. The gain is fixed at and is
Extended CMVR -5V to 36V
adequate to drive an ADC to full scale in most cases. This
Output Voltage Swing Rail to Rail
fixed gain is achieved in two separate stages, pre-amplifier
Bandwidth 80KHz
with gain of +7 and second stage amplifier with gain of
+2. The internal signal path between these two stages is Operating Temperature Range (Ambient) -40˚C to 125˚C brought out on two pins that provide connection for filter Operating Temperature Range (bare die) -40˚C to 150˚C
network. Supply Voltage 4.5V to 5.5V
The LMP8272, LMP8277 will function with reduced specifi- Supply Current 1m A
cations over the extended common mode input voltage range of -5 to Volts. This feature makes the device Applications suitable for applications with load dump in automotive sys-
Fuel Injection Control
tems.
Low Side Driver Configuration Current Sensing Power Management Systems
Typical Application
Typical Application: Low side Current Sensing
LMP™ is trademark of National Semiconductor Corporation.
National Semiconductor Corporation DS201309 www.national.com
Page Summary Contents For National LMP8272, LMP8277 Data Sheet
Manual Details
| Brand | National |
|---|---|
| Pages | 5 |
| File Size | 449.20 KB |
| Published | May 31, 2026 |
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Frequently Asked Questions
What is the Common Mode Rejection Ratio (CMRR)?
The unit offers a minimum CMRR of 80dB at both standard and extended voltage ranges.
Does this amplifier support load dump events in automotive systems?
Yes, it features an Extended CMVR range of -5V to 36V, which is suitable for applications with load dumps.
What power sources are compatible with the device?
The recommended operating supply voltage range is from 4.5V to 5.5V.
Can I incorporate an external filter into the circuit?
Yes, the internal signal path provides two dedicated pins for connecting a user-specified filter network.