0.1

1

10

1k

10k

FREQUENCY (Hz)

1

10

100

100

0.1

1

10

1k

10k

FREQUENCY (Hz)

1

10

100

100

LMP7732

www.ti.com

SNOSAZ0E – AUGUST 2007 – REVISED MARCH 2013

2.9 nV/sqrt(Hz) Low Noise, RRIO Amplifier

Check for Samples: LMP7732

1

FEATURES

DESCRIPTION

The LMP7732 is a dual low noise, rail-to-rail input

23

•

and output, low voltage amplifier. The LMP7732 is

•

Input Voltage Noise

part of the LMP™ amplifier family and is ideal for

–

f = 3 Hz 3.3 nV/

√Hz

precision and low noise applications with low voltage

requirements.

–

f = 1 kHz 2.9 nV/

√Hz

•

CMRR 130 dB

This operational amplifier offers low voltage noise of

2.9 nV/

√Hz with a 1/f corner of only 3 Hz. The

•

Open Loop Gain 130 dB

LMP7732 has bipolar junction input stages with a

•

GBW 22 MHz

bias current of only 1.5 nA. This low input bias

•

Slew Rate 2.4 V/µs

current, complemented by the very low level of

voltage noise, makes the LMP7732 an excellent

•

THD 0.001% @ f = 10 kHz, AV = 1, RL = 2 k

Ω

choice for photometry applications.

•

Supply Current 4.4 mA

The LMP7732 provides a wide GBW of 22 MHz while

•

Supply Voltage Range 1.8V to 5.5V

consuming only 4 mA of current. This high gain

•

Operating Temperature Range

−40°C to 125°C

bandwidth along with the high open loop gain of 130

•

Input Bias Current ±1.5 nA

dB

enables

accurate

signal

conditioning

in

applications with high closed loop gain requirements.

•

RRIO

The LMP7732 has a supply voltage range of 1.8V to

APPLICATIONS

5.5V, making it an ideal choice for battery operated

portable applications.

•

Gas Analysis Instruments

The LMP7732 is offered in the 8-Pin SOIC and

•

Photometric Instrumentation

VSSOP packages.

•

Medical Instrumentation

The LMP7731 is the single version of this product

and is offered in the 5-Pin SOT-23 and 8-Pin SOIC

packages.

Typical Performance Characteristics

Input Voltage Noise vs. Frequency

Input Current Noise vs. Frequency

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 © 2007–2013, 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.