Instrumentation Amplifiers

Instrumentation amplifiers are a type of precision gain block, a differential amplifier (a type of electronic amplifier that amplifies the voltage difference between two inputs but suppresses any voltage common to the two inputs). Instrumentation Amplifiers are also known as in-amps.

Common applications are:

  • Test & Measurement Industrial Devices
  • Data Acquisition Devices
  • Medical Devices
  • Any noisy environment where large common-mode signals are present

How do instrumentation amplifiers work?

An instrumentation amplifier measures small signals in a noisy environment. The noise generally is "common-mode noise" (the difference between the noise-free common-mode voltage and the actual common-mode voltage). An instrumentation amplifier uses its common-mode rejection to distinguish the noise from the signal of interest.

What are the instrumentation amplifiers used for?

Instrumentation amplifiers are needed in nearly every field of electronics, particularly in the test and measurement industry. They can be used as a voltage follower, selective inversion circuit, a current-to-voltage converter, active rectifier, integrator, a variety of filters, and a voltage comparator.

Unlike instrumentation amplifiers (In Amp), operational amplifiers (Op-Amp) are high-gain voltage amplifying devices with a differential input.


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Description Price Power Supply Type Package Type Mounting Type Typical Single Supply Voltage Pin Count Typical Dual Supply Voltage Rail to Rail Maximum Input Offset Voltage Minimum Operating Temperature Maximum Operating Temperature Maximum Input Resistance Minimum CMRR Typical Gain Bandwidth Product Maximum Supply Current
RS Stock No. 523-8200
Mfr. Part No.AD622ANZ
MYR33.74
Each
units
Dual PDIP Through Hole - 8 ±12 V, ±15 V, ±3 V, ±5 V, ±9 V No 0.125mV -40 °C +85 °C 0.00002GΩ 103dB 1MHz 1.3 mA
RS Stock No. 923-3521
Mfr. Part No.INA111BP
MYR65.568
Each (In a Tube of 50)
units
Dual PDIP Through Hole - 8 ±15V - - -40 °C +85 °C 10000GΩ 80dB - 4.5 mA
RS Stock No. 660-5204
Mfr. Part No.INA111BP
MYR72.46
Each
units
Dual PDIP Through Hole - 8 ±15V No - -40 °C +85 °C 10000GΩ 80dB - 4.5 mA
RS Stock No. 121-8274
Mfr. Part No.PGA204AU
MYR70.591
Each (In a Tube of 40)
units
Dual SOIC Surface Mount - 16 ±15V - 125µV -40 °C +85 °C 10GΩ 75dB 1MHz 7.5 mA
RS Stock No. 288-913
Mfr. Part No.PGA204AU
MYR80.36
Each
units
Dual SOIC Surface Mount - 16 ±15V No 125µV -40 °C +85 °C 10GΩ 75dB 1MHz 7.5 mA
RS Stock No. 523-0212
Mfr. Part No.AD620ARZ
MYR40.44
Each
units
Dual SOIC Surface Mount - 8 ±12 V, ±15 V, ±3 V, ±5 V, ±9 V No 0.125mV -40 °C +85 °C 10GΩ 73dB 120kHz -
RS Stock No. 111-2200
Mfr. Part No.AD623ANZ
MYR21.849
Each (In a Tube of 50)
units
Dual, Single PDIP Through Hole 3 V, 5 V, 9 V 8 ±3 V, ±5 V Rail to Rail Output 0.2mV -40 °C +85 °C 2GΩ 70dB - -
RS Stock No. 523-8575
Mfr. Part No.AD623ANZ
MYR26.57
Each
units
Dual, Single PDIP Through Hole 3 V, 5 V, 9 V 8 ±3 V, ±5 V Rail to Rail Output 0.2mV -40 °C +85 °C 2GΩ 70dB - -
RS Stock No. 779-8969
Mfr. Part No.LT1025CN8#PBF
MYR29.19
Each (In a Pack of 2)
units
Single CDIP Through Hole 4 to 36 V 8 - No - 0 °C +70 °C - - - 150 μA
RS Stock No. 252-1593
Mfr. Part No.INA125PA
MYR26.28
Each
units
Dual, Single PDIP Through Hole 5 V 16 ±15V No 0.5mV -55 °C +125 °C 100GΩ 72dB - -
RS Stock No. 160-4531
Mfr. Part No.AD8293G160ARJZ-R7
MYR3.531
Each (On a Reel of 3000)
units
Single SOT-23 Surface Mount 1.8 5.5 V 8 - Rail to Rail Output 50µV -40 °C 85 °C - 94dB 500Hz 1.5 mA
RS Stock No. 647-643
Mfr. Part No.INA110KP
MYR69.80
Each
units
Dual PDIP Through Hole - 16 ±15V No 500µV -25 °C +85 °C 5000GΩ 106dB 2.5MHz 4.5 mA
RS Stock No. 796-8877
Mfr. Part No.AD8421BRZ
MYR47.21
Each
units
Dual, Single SOIC Surface Mount 5 36 V 8 ±2.5 ±18V No 25µV -40 °C +125 °C 4kΩ 100dB 10MHz 2.6 mA
RS Stock No. 177-7115
Mfr. Part No.EL8170FSZ
BrandIntersil
MYR9.914
Each (In a Tube of 97)
units
Single SOIC Surface Mount 3 V, 5 V 8 - Rail to Rail Input/Output 0.2mV -40 °C +125 °C - 90dB - 0.095 mA
RS Stock No. 819-7332
Mfr. Part No.AD8293G160ARJZ-R7
MYR5.292
Each (In a Pack of 5)
units
Single SOT-23 Surface Mount 1.8 5.5 V 8 - Rail to Rail Output 50µV -40 °C +85 °C - 94dB 500Hz 1.5 mA
New
RS Stock No. 209-6063
Mfr. Part No.AD8250ARMZ
MYR49.05
Each
units
Single MSOP Surface Mount 15 V 10 - No ±6 - - - - 10MHz -
New
RS Stock No. 209-6062
Mfr. Part No.AD8250ARMZ
MYR43.806
Each (In a Tube of 50)
units
Single MSOP Surface Mount 15 V 10 - No ±6 - - - - 10MHz -
RS Stock No. 121-8507
Mfr. Part No.INA125PA
MYR22.344
Each (In a Tube of 25)
units
- - - - - - - - - - - - - -
RS Stock No. 518-069
Mfr. Part No.EL8170FSZ
BrandIntersil
MYR11.67
Each (In a Pack of 5)
units
Single SOIC Surface Mount 3 V, 5 V 8 - Rail to Rail Input/Output 0.2mV -40 °C +125 °C - 90dB - 0.095 mA
RS Stock No. 121-6904
Mfr. Part No.AD8421ARMZ
MYR22.18
Each (In a Tube of 50)
units
Dual, Single MSOP Surface Mount 5 6 V 8 ±2.5 ±18V - 60µV -40 °C +85 °C 20kΩ 134dB 10MHz 2.3 mA