LMP8645

更新时间： 2024-10-26 11:54:07

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	397K
描述
Precision High Voltage Current Sense Amplifier

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LMP8645 数据手册

July 1, 2010

LMP8645/LMP8645HV

Precision High Voltage Current Sense Amplifier

General Description

Features

The LMP8645 and the LMP8645HV 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

■

LMP8645

LMP8645HV

Supply voltage range

-2V to 42V

-2V to 76V

2.7V to 12V

—

The LMP8645 accepts input signals with common mode volt-

age range from -2V to 42V, while the LMP8645HV accepts

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

76V. The LMP8645 and LMP8645HV have adjustable gain

for applications where supply current and high common mode

voltage are the determining factors. The gain is configured

with a single resistor, providing a high level of flexibility, the

accuracy could be as low as 2% (max) including the gain set-

ting resistor. 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 LMP8645 is an ideal choice for industrial, au-

tomotive and consumer applications, and it is available in

TSOT-6 package.

■

Gain configurable with a single resistor

Max variable gain accuracy (with external resistor) 2.0%

Transconductance

Low offset voltage

Input bias

PSRR

CMRR

Temperature range

6-Pin TSOT Package

200 μA/V

1 mV

12 μA

90 dB

95 dB

−40°C to 125°C

Applications

High-side current sense

■

Vehicle current measurement

Motor controls

Battery monitoring

Remote sensing

Power management

Typical Application

30071632

LMP™ is a trademark of National Semiconductor Corporation.

300716

www.national.com

12 3 4 5 6 7...16

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与LMP8645相关器件

型号	品牌	获取价格	描述	数据表
LMP8645HV	NSC	获取价格	Precision High Voltage Current Sense Amplifier
LMP8645HV	TI	获取价格	-2V 至 76V、990kHz、可变增益电流感应放大器
LMP8645HVMK	NSC	获取价格	Precision High Voltage Current Sense Amplifier
LMP8645HVMK/NOPB	TI	获取价格	-2V 至 76V、990kHz、可变增益电流感应放大器 \| DDC \| 6 \| -40
LMP8645HVMKE	NSC	获取价格	Precision High Voltage Current Sense Amplifier
LMP8645HVMKE/NOPB	TI	获取价格	-2V 至 76V、990kHz、可变增益电流感应放大器 \| DDC \| 6 \| -40
LMP8645HVMKX	NSC	获取价格	Precision High Voltage Current Sense Amplifier
LMP8645HVMKX/NOPB	TI	获取价格	-2V 至 76V、990kHz、可变增益电流感应放大器 \| DDC \| 6 \| -40
LMP8645MK	NSC	获取价格	Precision High Voltage Current Sense Amplifier
LMP8645MK/NOPB	TI	获取价格	-2V 至 42V、990kHz、可变增益电流感应放大器 \| DDC \| 6 \| -40