Zero Drift, Low Noise, EMI Hardened Amplifier - LMP2021


Zero Drift, Low Noise, EMI Hardened Amplifier


The LMP2021/LMP2022 are single and dual precision operational amplifiers offering ultra low input offset voltage, near zero input offset voltage drift, very low input voltage noise and very high open loop gain. They are part of the LMP precision family and are ideal for instrumentation and sensor interfaces.

The LMP2021/LMP2022 have only 0.004 µV/°C of input offset voltage drift, and 0.4 µV of input offset voltage. These attributes provide great precision in high accuracy applications.

The proprietary continuous correction circuitry ensures impressive CMRR and PSRR, removes the 1/f noise component, and eliminates the need for calibration in many circuits.

With only 260 nVPP (0.1 Hz to 10 Hz) of input voltage noise and no 1/f noise component, the LMP2021/LMP2022 are suitable for low frequency applications such as industrial precision weigh scales. The low input bias current of 23 pA makes these excellent choices for high source impedance circuits such as non-invasive medical instrumentation as well as test and measurement equipment. The extremely high open loop gain of 160 dB drastically reduces gain error in high gain applications. With ultra precision DC specifications and very low noise, the LMP2021/LMP2022 are ideal for position sensors, bridge sensors, pressure sensors, medical equipment and other high accuracy applications with very low error budgets.

The LMP2021 is offered in 5-Pin SOT-23 and 8-Pin SOIC packages. The LMP2022 is offered in 8-Pin VSSOP and 8-Pin SOIC packages.


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

  • Input Offset Voltage (Typical) −0.4 µV
  • Input Offset Voltage (Max) ±5 µV
  • Input Offset Voltage Drift (Typical) -0.004 µV/°C
  • Input Offset Voltage Drift (Max) ±0.02 µV/°C
  • Input Voltage Noise, AV = 1000 11 nV/√Hz
  • Open Loop Gain 160 dB
  • CMRR 139 dB
  • PSRR 130 dB
  • Supply Voltage Range 2.2V to 5.5V
  • Supply Current (per Amplifier) 1.1 mA
  • Input Bias Current ±25 pA
  • GBW 5 MHz
  • Slew Rate 2.6 V/µs
  • Operating Temperature Range −40°C to 125°C
  • 5-Pin SOT-23, 8-Pin VSSOP and 8-Pin SOIC Packages

All trademarks are the property of their respective owners.

View more

Parametrics Compare all products in Precision Amplifier

Number of Channels (#)
Total Supply Voltage (Min) (+5V=5, +/-5V=10)
Total Supply Voltage (Max) (+5V=5, +/-5V=10)
Iq per channel (Max) (mA)
Slew Rate (Typ) (V/us)
Vos (Offset Voltage @ 25C) (Max) (mV)
Offset Drift (Typ) (uV/C)
CMRR (Min) (dB)
GBW (Typ) (MHz)
IIB (Max) (pA)
Vn at 1kHz (Typ) (nV/rtHz)
Operating Temperature Range (C)
Approx. Price (US$)
LMP2021 LMP2022
1     2    
2.2     2.2    
5.5     5.5    
1.1     1.1    
2.6     2.6    
0.005     0.005    
0.004     0.004    
139     139    
5     5    
300     300    
11     11    
Out     Out    
Catalog     Catalog    
-40 to 125     -40 to 125    
1.00 | 1ku     1.35 | 1ku    

Related end equipment

  • Precision Instrumentation Amplifiers
  • Battery Powered Instrumentation
  • Thermocouple Amplifiers
  • Bridge Amplifiers

Featured tools and software

Click Here