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LMP8601, LMP8601-Q1

SNOSAR2G – SEPTEMBER 2008 – REVISED JULY 2015

LMP8601, LMP8601-Q1 60-V Common-Mode Bidirectional Precision Current-Sensing

Amplifier

1 Features

3 Description

The LMP8601 and LMP8601-Q1 devices are fixed

1

•

20x gain precision amplifiers that will amplify and filter

small differential signals in the presence of high

–

common-mode voltages. The input common-mode

–

CMRR 90 dB Minimum

voltage range is –22 V to +60 V when operating from

a single 5-V supply, or –4 V to +27 V with a 3.3-V

–

Input offset voltage 1 mV Maximum

supply. The LMP8601 and LMP8601-Q1 are ideal

–

parts for unidirectional and bidirectional current

–

sensing applications.

–

Operating Ambient Temperature Range –40°C

The fixed gain is achieved in two separate stages, a

to 125°C

preamplifier with a gain of 10x and an output stage

buffer amplifier with a gain of 2x. The path between

–

Single-Supply Bidirectional Operation

the two stages is brought out on two pins to enable

–

All Minimum and Maximum Limits 100%

the option of an additional filter network or modifying

Tested

the gain.

–

LMP8601-Q1 is Qualified for Automotive

The offset input pin enables the user to use these

Applications:

devices for unidirectional or bidirectional single supply

–

Device Temperature AEC-Q100 Grade 1:

voltage current sensing.

–40°C to 125°C Operating Range

The

LMP8601-Q1

incorporates

enhanced

–

Device HBM ESD Classification: Level 2

manufacturing

and

support

processes

for

the

(3A on inputs)

automotive market and is compliant with the AEC

–

Device CDM ESD Classification: Level C6

Q100 standard.

–

Device MM ESD Classification: Level M2

If higher gain is required, the LMP8602 is available

with a gain of 50, or the LMP8603 with a gain of 100.

2 Applications

Device Information(1)

•

High-Side and Low-Side Driver Configuration

PART NUMBER

PACKAGE

BODY SIZE (NOM)

Current Sensing

LMP8601

•

Bidirectional Current Measurement

SOIC (8)

4.90 mm x 3.91 mm

LMP8601-Q1

•

Current Loop to Voltage Conversion

(1) For all available packages, see the orderable addendum at

•

Automotive Fuel Injection Control

the end of the data sheet.

•

Transmission Control

•

Power Steering

•

Battery Management Systems

Typical Applications

1

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.