Datasheet > LMP8272

LMP8272

更新时间： 2024-11-22 22:31:11

品牌	Logo	应用领域
美国国家半导体 - NSC		放大器
页数	文件大小	规格书
5页	458K
描述
High Common Mode, Gain of 14, Precision Voltage Difference Amplifiers

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LMP8272 数据手册

PRELIMINARY

January 2005

LMP8272, LMP8277

High Common Mode, Gain of 14, Precision Voltage

Difference Amplifiers

General Description

Features

n Typical Values, TA = 25˚C

n Input Offset Voltage

n TCVos (LMP8272)

n TCVos (LMP8277)

n CMRR

™

The LMP 8272, LMP8277 are fixed gain differential ampli-

fiers with a -2V to 27V input common mode voltage range

and a supply voltage range of 4.5V to 5.5V. The LMP8272,

LMP8277 are precision amplifiers which will detect, amplify

and filter small differential signals in the presence of high

common mode voltages. The gain is fixed at 14 and is

adequate to drive an ADC to full scale in most cases. This

fixed gain is achieved in two separate stages, a pre-amplifier

with gain of +7 and a second stage amplifier with a gain of

+2. The internal signal path between these two stages is

brought out on two pins that provide a connection for a filter

network.

1mV max

15µV/˚C max

30µV/˚C max

80dB Min

-5V to 36V

Rail to Rail

80KHz

n Extended CMVR

n Output Voltage Swing

n Bandwidth

n Operating Temperature Range (Ambient) -40˚C to 125˚C

n Operating Temperature Range (bare die) -40˚C to 150˚C

n Supply Voltage

n Supply Current

4.5V to 5.5V

1mA

The LMP8272, LMP8277 will function with reduced specifi-

cations over the extended common mode input voltage

range of -5 to 36 Volts. This feature makes the device

suitable for applications with load dump in automotive sys-

tems.

Applications

n Fuel Injection Control

n Low Side Driver Configuration Current Sensing

n Power Management Systems

Typical Application

Typical Application: Low side Current Sensing

20130901

™

LMP is a trademark of National Semiconductor Corporation.

DS201309

www.national.com

12 3 4 5

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