LMP7312

www.ti.com

SNOSB32B – MARCH 2010 – REVISED MARCH 2013

LMP7312 Precision SPI-Programmable AFE with Differential/Single-Ended Input/Output

Check for Samples: LMP7312

1

FEATURES

DESCRIPTION

The LMP7312 is a digitally programmable variable

2

•

gain amplifier/attenuator. Its wide input voltage range

•

Gain Bandwidth 1 MHz

and superior precision make it a prime choice for

•

Input Voltage Range (G= 0.096 V/V) -15V to

applications requiring high accuracy such as data

+15V

acquisition systems for IO modules in programmable

logic

control

(PLC).

The

LMP7312

provides

a

•

Core Op-Amp Input Offset Voltage 100 µV

differential output to maximize dynamic range and

(Max)

signal to noise ratio, thereby reducing the overall

•

Supply Current 2 mA (Max)

system error. It can also be configured to handle

•

Gain (Attenuation Mode) 0.096 V/V, 0.192

single ended input data converters by means of the

V/V0.384 V/V, 0.768 V/V

inputs of LMP7312 can be configured in attenuation

•

Gain (Amplification Mode) 1 V/V, 2 V/V

mode to handle large input signals of up to +/- 15V,

•

Gain Error 0.035% (Max)

as well as in amplification mode to handle current

•

Core Op-Amp PSRR 90 dB (Min)

loops of 0-20mA and 4-20mA.The LMP7312 is

equipped with a null switch to evaluate the offset of

•

CMRR 80 dB (min)

the internal amplifier. A ensured 0.035% maximum

•

Adjustable Output Common Mode 1V to 4V

gain error (for all gains) and a maximum gain drift of

•

Temperature Range

−40 to 125°C

5ppm over the extended industrial temperature range

(-40° to 125°C) make the LMP7312 very attractive for

•

Package 14-Pin SOIC

high precision systems even under harsh conditions.

A low input offset voltage of 100µV and low voltage

APPLICATIONS

noise of 3µVpp give the LMP7312 a superior

•

Signal Conditioning AFE

performance. The LMP7312 is fully specified from -

40° to 125°C and is available in SOIC-14 package.

–

±10V; ±5V; 0-5V; 0-10V; 0-20mA; 4-20mA

•

Data Acquisition Systems

•

Motor Control

•

Instrument and Process Control

•

Remote Sensing

•

Programmable Automation Control

1

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

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

2

All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Copyright © 2010–2013, 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.