LMP8480, LMP8481

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SNVS829A – JUNE 2012 – REVISED AUGUST 2012

LMP8480 / LMP8481 Precision 76V High-Side Current Sense Amplifiers with Voltage

Output

Check for Samples: LMP8480, LMP8481

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FEATURES

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Temperature Range -40 to +125°C

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MSOP-8 or LLP-8 Packages

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•

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Bi-Directional or Uni-Directional Sensing

APPLICATIONS

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Common Mode Voltage Range 4.0V to 76V

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High-side current sense

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Supply Voltage Range 4.5V to 76V

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Vehicle current measurement

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Fixed Gains 20, 50, 60 and 100 V/V

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Telecommunications

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Gain Accuracy ±0.1%

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Motor controls

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Offset ±80µV

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Laser or LED Drivers

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Bandwidth (-3dB) 270KHz

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Energy Management

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Quiescent Current <100µA

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Solar Panel Monitoring

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Buffered High-Current Output >5mA

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Input Bias Current 7µA

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PSRR (DC) 122dB

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CMRR (DC) 124dB

DESCRIPTION

The LMP8480 and LMP8481 are precision high-side current sense amplifiers that amplify a small differential

voltage developed across a current sense resistor in the presence of high input common-mode voltages.

These amplifiers are designed for bidirectional (LMP8481) or unidirectional (LMP8480) current applications and

will accept input signals with common-mode voltage range from 4V to 76V with a bandwidth of 270 kHz.

Since the operating power supply range overlaps the input common mode voltage range, the LMP848x can be

powered by the same voltage that is being monitored. This benefit eliminates the need for an intermediate supply

voltage to be routed to the point of load where the current is being monitored, resulting in reduced component

count and board space.

The LMP848x family consists of fixed gains of 20, 50, 60 and 100 for applications that demand high accuracy

over temperature. The low input offset voltage allows the use of smaller sense resistors without sacrificing

system error.

The wide operating temperature range of -40C to 125C makes the LMP848x an ideal choice for automotive,

telecommunications, industrial, and consumer applications.

The LMP8480 and LMP8481 are pin for pin replacements for the MAX4080 and MAX4081, offering improved

offset voltage, wider reference adjust range and higher output drive capabilities.

The LMP8480 and LMP8481 are available in a 8-pin MSOP package and the LMP8481 is also available in a

8–pad LLP.

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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

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PRODUCTION DATA information is current as of publication date.

Copyright © 2012, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.