LMP8100

www.ti.com

SNOSAO1B – JULY 2007 – REVISED APRIL 2008

LMP8100 Programmable Gain Amplifier

Check for Samples: LMP8100

1

FEATURES

•

Supply voltage range 2.7V to 5.5V

•

Supply current 5.3 mA

23

•

•

•

Gain error (over temperature range)

mV

–

LMP8100A 0.03%

–

LMP8100 0.075%

APPLICATIONS

•

Gain range 1 to 16 V/V in 1 V/V steps

•

Industrial instrumentation

•

Programmable frequency compensation

•

Data acquisition systems

•

Input zero calibration switch

•

Test equipment

•

Input offset voltage (max, LMP8100A) 250

μV

•

Scaling amplifier

•

Input bias current 0.1 pA

•

Gain control

•

Input noise voltage 12 nV/

√Hz

•

Sensor interface

•

Unity gain bandwidth 33 MHz

•

Slew rate 12 V/

μs

•

Output current 20 mA

DESCRIPTION

The LMP8100 programmable gain amplifier features an adjustable gain from 1 to 16 V/V in 1 V/V increments. At

the core of the LMP8100 is a precision, 33 MHz, CMOS input, rail-to-rail input/output operational amplifier with a

typical open-loop gain of 110 dB. Amplifier closed-loop gain is set by an array of precision thin-film resistors.

Amplifier control modes are programmed via a serial port that allows devices to be cascaded so that an array of

LMP8100 amplifiers can be programmed by a single serial data stream. The control mode registers are double

buffered to insure glitch-free transitions between programmed settings. The LMP8100 is part of the LMP™

precision amplifier family and is ideal for a variety of applications.

The amplifier features several programmable controls including: gain; a power-conserving shutdown mode which

can reduce current consumption to only 20

μA; an input zeroing switch which allows the output offset voltage to

be measured to facilitate system calibration; and four levels of internal frequency compensation which can be set

to maximize bandwidth at the different gain settings.

The LMP8100 comes in a 14-Pin SOIC package.

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

LMP is a trademark of Texas Instruments.

3

All other trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Copyright © 2007–2008, 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.