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. 660-5232
Mfr. Part No.INA125P
MYR40.02
Each
units
Dual, Single PDIP Through Hole 5 V 16 ±15V No 0.25mV -55 °C +125 °C 100GΩ 78dB - -
RS Stock No. 111-2076
Mfr. Part No.AD622ANZ
MYR31.993
Each (In a Tube of 50)
units
Dual PDIP Through Hole - 8 ±12 V, ±15 V, ±3 V, ±5 V, ±9 V - 0.125mV -40 °C +85 °C 2e-005GΩ 103dB 1MHz 1.3 mA
RS Stock No. 523-8200
Mfr. Part No.AD622ANZ
MYR37.41
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. 923-3533
Mfr. Part No.INA125P
MYR23.276
Each (In a Tube of 25)
units
Dual, Single PDIP Through Hole 5 V 16 ±15V - 0.25mV -55 °C +125 °C 100GΩ 78dB - -
RS Stock No. 923-3521
Mfr. Part No.INA111BP
MYR68.083
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
MYR77.16
Each
units
Dual PDIP Through Hole - 8 ±15V No - -40 °C +85 °C 10000GΩ 80dB - 4.5 mA
RS Stock No. 165-9306
Mfr. Part No.MAX4194ESA+
BrandMaxim
MYR22.393
Each (In a Tube of 100)
units
Dual, Single SOIC Surface Mount 2.7 → 7.5 V 8 ±1.35 → ±3.75V Rail to Rail Output 0.69mV -40 °C +85 °C 1GΩ 60dB 250kHz 0.00002 mA
RS Stock No. 732-8396
Mfr. Part No.MAX4194ESA+
BrandMaxim
MYR23.42
Each
units
Dual, Single SOIC Surface Mount 2.7 → 7.5 V 8 ±1.35 → ±3.75V Rail to Rail Output 0.69mV -40 °C +85 °C 1GΩ 60dB 250kHz 0.00002 mA
RS Stock No. 523-0212
Mfr. Part No.AD620ARZ
MYR40.97
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. 912-7381
Mfr. Part No.AD620ARZ
MYR29.929
Each (In a Tube of 98)
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. 165-9491
Mfr. Part No.MAX31855KASA+
BrandMaxim
MYR36.733
Each (In a Tube of 100)
units
Single SOIC Surface Mount 3.3 V 8 - No - -200 °C +1350 °C - - - 1500 μA
RS Stock No. 786-1017
Mfr. Part No.MAX31855KASA+
BrandMaxim
MYR38.97
Each
units
Single SOIC Surface Mount 3.3 V 8 - No - -200 °C +1350 °C - - - 1500 μA
RS Stock No. 111-2200
Mfr. Part No.AD623ANZ
MYR21.811
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
MYR27.71
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. 145-6601
Mfr. Part No.LT1025CN8#PBF
MYR18.537
Each (In a Tube of 50)
units
Single CDIP Through Hole 4 → 36 V 8 - No - 0 °C +70 °C - - - 150 μA
RS Stock No. 779-8969
Mfr. Part No.LT1025CN8#PBF
MYR26.425
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. 518-069
Mfr. Part No.EL8170FSZ
BrandIntersil
MYR10.584
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. 819-7332
Mfr. Part No.AD8293G160ARJZ-R7
MYR5.816
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
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. 709-7086
Mfr. Part No.AD8253ARMZ
MYR47.26
Each
units
Dual MSOP Surface Mount - 10 ±12 V, ±9 V No 150µV -40 °C +85 °C 0.00002GΩ 80dB 10MHz -