LMP7731 Single 2.9 nV/sqrt(Hz) Low Noise, Precision, RRIO Amplifier | TI.com

LMP7731
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Single 2.9 nV/sqrt(Hz) Low Noise, Precision, RRIO Amplifier

Single 2.9 nV/sqrt(Hz) Low Noise, Precision, RRIO Amplifier - LMP7731
Datasheet
LMP7731 2.9 nV/sqrt(Hz) Low Noise, Precision, RRIO Amplifier datasheet (Rev. E)
 

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.

Features

    (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

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Parametrics

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Part number Order Number of channels (#) Total supply voltage (Min) (+5V=5, +/-5V=10) Total supply voltage (Max) (+5V=5, +/-5V=10) GBW (Typ) (MHz) Slew rate (Typ) (V/us) Rail-to-rail Vos (offset voltage @ 25 C) (Max) (mV) Offset drift (Typ) (uV/C) Iq per channel (Typ) (mA) Vn at 1 kHz (Typ) (nV/rtHz) CMRR (Typ) (dB) Rating Operating temperature range (C) Package Group Package size: mm2:W x L (PKG) Input bias current (Max) (pA) Output current (Typ) (mA) Features Architecture
LMP7731 Order now 1     1.8     5.5     22     2.4     In
Out    		 0.5     0.5     2.2     2.9     120     Catalog     -40 to 125     SOIC | 8
SOT-23 | 5    		 8SOIC: 19 mm2: 3.91 x 4.9 (SOIC | 8)
5SOT-23: 5 mm2: 1.6 x 2.9 (SOT-23 | 5)    		 50000     47         Bipolar    
LMP7732 Order now 2     1.8     5.5     22     2.4     In
Out    		 0.5     0.5     2.2     2.9     120     Catalog     -40 to 125     SOIC | 8
VSSOP | 8    		 8SOIC: 19 mm2: 3.91 x 4.9 (SOIC | 8)
8VSSOP: 15 mm2: 4.9 x 3 (VSSOP | 8)    		 50000     47         Bipolar