Datasheet > LMP8275

LMP8275

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 20, Precision Voltage Difference Amplifiers

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LMP8275 数据手册

PRELIMINARY

January 2005

LMP8270, LMP8275

High Common Mode, Gain of 20, Precision Voltage

Difference Amplifiers

General Description

Features

n Typical Values, TA = 25˚C

n Input Offset Voltage

n TCVos (LMP8270)

n TCVos (LMP8275)

n CMRR

™

The LMP 8270, LMP8275 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 LMP8270,

LMP8275 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 20 and is

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

LMP8270, LMP8275 have a preamplifier with a fixed gain of

10 and an amplifier with a fixed gain of 2, achieving overall

fixed gain of 20. The internal signal path between these two

stages is brought out on two pins, A1 and A2, which 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 LMP8270, LMP8275 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

20130702

™

LMP is a trademark of National Semiconductor Corporation.

DS201307

www.national.com

12 3 4 5

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