LMP8640

更新时间： 2024-10-26 11:37:23

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
16页	1094K
描述
Precision High Voltage Current Sense Amplifier

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LMP8640 数据手册

September 7, 2010

LMP8640/LMP8640HV

Precision High Voltage Current Sense Amplifier

General Description

Features

The LMP8640 and the LMP8640HV are precision current

sense amplifiers that detect small differential voltages across

a sense resistor in the presence of high input common mode

voltages with a supply voltage range from 2.7V to 12V.

Typical values, T_A= 25°C

High common-mode voltage range

■

LMP8640

LMP8640HV

-2V to 42V

-2V to 76V

2.7V to 12V

—

The LMP8640 accepts input signals with common mode volt-

age range from -2V to 42V, while the LMP8640HV accepts

input signal with common mode voltage range from -2V to

76V. The LMP8640 and LMP8640HV have fixed gain for ap-

plications that demand accuracy over temperature. The

LMP8640 and LMP8640HV come out with three different

fixed gains 20V/V, 50V/V, 100V/V ensuring a gain accuracy

as low as 0.25%. The output is buffered in order to provide

low output impedance. This high side current sense amplifier

is ideal for sensing and monitoring currents in DC or battery

powered systems, excellent AC and DC specifications over

temperature, and keeps errors in the current sense loop to a

minimum. The LMP8640 and LMP8640HV are ideal choice

for industrial, automotive and consumer applications, and it is

available in TSOT-6 package.

Supply voltage range

Gain options

■

20V/V; 50V/V; 100V/V

0.25%

Max gain error

Low offset voltage

Input bias current

PSRR

CMRR (2.1V to 42V)

Temperature range

6-Pin TSOT Package

900µV

13 μA

85 dB

103 dB

-40°C to 125°C

Applications

High-side current sense

■

Vehicle current measurement

Motor controls

Battery monitoring

Remote sensing

Power management

Typical Application

30071462

LMP™ is a trademark of National Semiconductor Corporation.

300714

www.national.com

12 3 4 5 6 7...16

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与LMP8640相关器件

型号	品牌	获取价格	描述	数据表
LMP8640_15	TI	获取价格	LMP8640/-Q1/HV Precision High Voltage Current Sense Amplifiers
LMP8640HV	TI	获取价格	Precision High Voltage Current Sense Amplifier
LMP8640HV	NSC	获取价格	Precision High Voltage Current Sense Amplifier
LMP8640HV_15	TI	获取价格	LMP8640/-Q1/HV Precision High Voltage Current Sense Amplifiers
LMP8640HVMKE-F	NSC	获取价格	Precision High Voltage Current Sense Amplifier
LMP8640HVMKE-F	TI	获取价格	Precision High Voltage Current Sense Amplifier
LMP8640HVMKE-F/NOPB	TI	获取价格	-2V 至 76V、950kHz 电流感应放大器 \| DDC \| 6 \| -40 to 1
LMP8640HVMKE-H	TI	获取价格	Precision High Voltage Current Sense Amplifier
LMP8640HVMKE-H	NSC	获取价格	Precision High Voltage Current Sense Amplifier
LMP8640HVMKE-H/NOPB	TI	获取价格	-2 to 76V, 950kHz current sense amplifier 6-SOT-23-THIN -40 to 125