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
MYR32.15
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. 111-2076
Mfr. Part No.AD622ANZ
MYR25.56
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. 732-8396
Mfr. Part No.MAX4194ESA+
MYR12.54
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. 165-9306
Mfr. Part No.MAX4194ESA+
MYR20.154
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. 912-7381
Mfr. Part No.AD620ARZ
MYR29.24
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. 523-0212
Mfr. Part No.AD620ARZ
MYR36.81
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. 786-1017
Mfr. Part No.MAX31855KASA+
MYR20.25
Each
units
Single SOIC Surface Mount 3.3 V 8 - No - -200 °C +1350 °C - - - 1500 μA
RS Stock No. 165-9491
Mfr. Part No.MAX31855KASA+
MYR20.25
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. 111-2200
Mfr. Part No.AD623ANZ
MYR18.81
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
MYR24.54
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
MYR25.42
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. 106-6379
Mfr. Part No.AD595AQ
MYR73.826
Each (In a Tube of 25)
units
Dual, Single CDIP Through Hole 5 V 14 ±15V - - -55 °C +125 °C - - 15kHz -
RS Stock No. 121-6904
Mfr. Part No.AD8421ARMZ
MYR19.26
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
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. 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. 806-7988
Mfr. Part No.AD8421ARMZ
MYR25.15
Each
units
Dual, Single MSOP Surface Mount 5 → 6 V 8 ±2.5 → ±18V - 60µV -40 °C +85 °C 20kΩ 134dB 10MHz 2.3 mA
RS Stock No. 301-779
Mfr. Part No.AD595AQ
MYR83.31
Each
units
Dual, Single CDIP Through Hole 5 V 14 ±15V No - -55 °C +125 °C - - 15kHz -
RS Stock No. 252-1593
Mfr. Part No.INA125PA
MYR24.98
Each
units
Dual, Single PDIP Through Hole 5 V 16 ±15V No 0.5mV -55 °C +125 °C 100GΩ 72dB - -
RS Stock No. 522-9717
Mfr. Part No.AD620ANZ
MYR46.01
Each
units
Dual PDIP Through Hole - 8 ±12 V, ±15 V, ±3 V, ±5 V, ±9 V No 0.125mV -40 °C +85 °C 10GΩ 73dB 1MHz -
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