1FEATURES

23(Typical Values, TA = 25°C, VS = 5V)

• Input Voltage Noise

– f = 3 Hz 3.3 nV/√Hz

– f = 1 kHz 2.9 nV/√Hz

• CMRR 130 dB

• Open Loop Gain 130 dB

• GBW 22 MHz

• Slew Rate 2.4 V/μs

• THD @ f = 10 kHz, AV = +1, RL = 2 kΩ 0.001%

• Supply Current per Channel 2.2 mA

• Supply Voltage Range 1.8V to 5.5V

• Operating Temperature Range −40°C to 125°C

• Input Bias Current ±1.5 nA

• RRIO

APPLICATIONS

• Gas Analysis Instruments

• Photometric Instrumentation

• Medical Instrumentation

DESCRIPTION

The LMP7731 is a single, low noise, rail-to-rail input

and output, low voltage amplifier. The LMP7731 is

part of the LMP™ precision amplifier family and is

ideal for precision and low noise applications with low

voltage requirements.

This operational amplifier offers low voltage noise of

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

LMP7731 has bipolar input stages with a bias current

of only 1.5 nA. This low input bias current,

complemented by the very low level of voltage noise,

makes the LMP7731 an excellent choice for

photometry applications.

The LMP7731 provides a wide GBW of 22 MHz while

consuming only 2 mA of current. This high gain

bandwidth along with the high open loop gain of 130

dB enables accurate signal conditioning in

applications with high closed loop gain requirements.

The LMP7731 has a supply voltage range of 1.8V to

5.5V, making it an ideal choice for battery operated

portable applications.

The LMP7731 is offered in the space saving 5-Pin

SOT-23 and 8-Pin SOIC packages.