LMP7731 Low Noise Precision Amplifier

Texas Instruments' 2.9nV/sqrt(Hz) low noise, precision, RRIO amplifier from the PowerWise® family

image Texas Instruments' LMP7731 Low Noise Precision AmplifierTexas Instruments' LMP7731 is a single, low noise, low offset voltage, rail-to-rail input and output, low voltage precision 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/sqrt(Hz) with a 1/f corner of only 3 Hz and low DC offset with a maximum value of ±40 µV, targeting high accuracy, low frequency applications. 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 AC and DC levels 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 1.8 V to 5.5 V, 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.

Features
  • Typical Values, TA = 25°C, V+=5 V, V-=0V
  • Gain Bandwidth 1 MHz
  • Input Voltage Range (G= 0.096 V/V) -15 V to +15 V
  • Core Op-Amp Input Offset Voltage 100 μV (Max)
  • Supply Current 2 mA (Max)
  • Gain (Attenuation Mode) 0.096 V/V, 0.192 V/V0.384 V/V, 0.768 V/V
  • Gain (Amplification Mode) 1 V/V, 2 V/V
  • Gain Error 0.035% (Max)
  • Core Op-Amp PSRR 90 dB (Min)
  • CMRR 80 dB (min)
  • Adjustable Output Common Mode 1 V to 4 V
  • Temperature Range −40 to 125°C
  • Package 14-Pin SOIC
Applications
  • Thermophile amplifier
  • Gas analysis instruments
  • Photometric instrumentation
  • Medical instrumentation

Low Noise Precision Amplifier

ImageManufacturer Part NumberDescriptionAmplifier TypeNumber of CircuitsAvailable Quantity
LMP7731MF/NOPB datasheet linkIC OPAMP GP 22MHZ RRO SOT23-5LMP7731MF/NOPBIC OPAMP GP 22MHZ RRO SOT23-5General Purpose16612 - Immediate
10000 - Factory Stock
LMP7731MF/NOPB product page link
Published: 2009-01-29