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Precision op amps (Vos<1mV)

LMP7731

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

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Data sheet
Single 2.9 nV/sqrt(Hz) Low Noise, Precision, RRIO Amplifier

LMP7731

ACTIVE
Data sheet Order now

Product details

Number of channels (#) 1 Total supply voltage (Max) (+5V=5, +/-5V=10) 5.5 Total supply voltage (Min) (+5V=5, +/-5V=10) 1.8 Vos (offset voltage @ 25 C) (Max) (mV) 0.5 GBW (Typ) (MHz) 22 Features — Slew rate (Typ) (V/us) 2.4 Rail-to-rail In, Out Offset drift (Typ) (uV/C) 0.5 Iq per channel (Typ) (mA) 2.2 Vn at 1 kHz (Typ) (nV/rtHz) 2.9 CMRR (Typ) (dB) 120 Rating Catalog Operating temperature range (C) -40 to 125 Input bias current (Max) (pA) 30000 Output current (Typ) (mA) 47 Architecture Bipolar THD + N @ 1 kHz (Typ) (%) 0.001
Number of channels (#) 1 Total supply voltage (Max) (+5V=5, +/-5V=10) 5.5 Total supply voltage (Min) (+5V=5, +/-5V=10) 1.8 Vos (offset voltage @ 25 C) (Max) (mV) 0.5 GBW (Typ) (MHz) 22 Features — Slew rate (Typ) (V/us) 2.4 Rail-to-rail In, Out Offset drift (Typ) (uV/C) 0.5 Iq per channel (Typ) (mA) 2.2 Vn at 1 kHz (Typ) (nV/rtHz) 2.9 CMRR (Typ) (dB) 120 Rating Catalog Operating temperature range (C) -40 to 125 Input bias current (Max) (pA) 30000 Output current (Typ) (mA) 47 Architecture Bipolar THD + N @ 1 kHz (Typ) (%) 0.001
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SOIC (D) 8 19 mm² 4.9 x 3.9 SOT-23 (DBV) 5 5 mm² 2.9 x 1.6
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    (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

All trademarks are the property of their respective owners.

    (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

All trademarks are the property of their respective owners.

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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.

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.

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Technical documentation

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Type Title Date
* Data sheet LMP7731 2.9 nV/sqrt(Hz) Low Noise, Precision, RRIO Amplifier datasheet (Rev. E) 27 Mar 2013
E-book The Signal e-book: A compendium of blog posts on op amp design topics 28 Mar 2017
User guide 551012875, 551012922 Universal Op Amp Evaluation Boards (SOT-23 and SC-70) (Rev. C) 01 May 2013
Application note AN-1873 DC Parameters (Rev. A) 01 May 2013
Application note AN-1515 A Comprehensive Study of the Howland Current Pump (Rev. A) 26 Apr 2013
Technical article Get all your bits with the LM7705 28 Mar 2012

Design & development

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SNOM657A.ZIP (11 KB) - TINA-TI Spice Model
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Package Pins Download
SOIC (D) 8 View options
SOT-23 (DBV) 5 View options

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