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. 704-4032
Mfr. Part No.INA333AIDGKT
TWD173.00
Each
units
Dual, Single MSOP Surface Mount 1.8 5.5 V 8 ±0.9 ±2.75V Rail to Rail Output 0.025mV -40 °C +150 °C 100GΩ 80dB 150kHz 0.075 mA
RS Stock No. 923-6683
Mfr. Part No.INA333AIDGKT
TWD105.80
Each (On a Reel of 250)
units
Dual, Single MSOP Surface Mount 1.8 5.5 V 8 ±0.9 ±2.75V Rail to Rail Output 0.025mV -40 °C +150 °C 100GΩ 80dB 150kHz 0.075 mA
RS Stock No. 231-5512
Mfr. Part No.INA118U
TWD460.00
Each
units
Dual SOIC Surface Mount - 8 ±15V No 125µV -40 °C +125 °C 10GΩ 73dB 800kHz 0.385 mA
RS Stock No. 100-0773
Mfr. Part No.INA118U
TWD401.50
Each (In a Tube of 75)
units
Dual SOIC Surface Mount - 8 ±15V - 125µV -40 °C +125 °C 10GΩ 73dB 800kHz 0.385 mA
RS Stock No. 912-7113
Mfr. Part No.AD620BNZ
TWD484.20
Each (In a Tube of 50)
units
Dual PDIP Through Hole - 8 ±12 V, ±15 V, ±3 V, ±5 V, ±9 V No 50µV -40 °C +85 °C 10GΩ 80dB 120kHz -
RS Stock No. 522-9717
Mfr. Part No.AD620ANZ
TWD403.00
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 -
RS Stock No. 412-327
Mfr. Part No.AD620BNZ
TWD590.00
Each
units
Dual PDIP Through Hole - 8 ±12 V, ±15 V, ±3 V, ±5 V, ±9 V No 50µV -40 °C +85 °C 10GΩ 80dB 120kHz -
RS Stock No. 111-1132
Mfr. Part No.AD620ANZ
TWD335.90
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 10GΩ 73dB 1MHz -
RS Stock No. 161-0179
Mfr. Part No.AD621ARZ
TWD306.20
Each (In a Tube of 98)
units
Dual SOIC Surface Mount - 8 ±12 V, ±15 V, ±3 V, ±5 V, ±9 V No 0.25mV -40 °C +85 °C 10GΩ 93dB - -
RS Stock No. 759-0080
Mfr. Part No.AD8495ARMZ
TWD203.00
Each
units
Dual, Single MSOP Surface Mount 2.7 36 V 8 ±2.7 ±18V Rail to Rail Output - -40 °C +125 °C 60kΩ - 25kHz 0.25 mA
RS Stock No. 121-6694
Mfr. Part No.AD8495ARMZ
TWD161.30
Each (In a Tube of 50)
units
- - - - - - - - - - - - - -
RS Stock No. 427-266
Mfr. Part No.AD621ARZ
TWD385.00
Each
units
Dual SOIC Surface Mount - 8 ±12 V, ±15 V, ±3 V, ±5 V, ±9 V No 0.25mV -40 °C +85 °C 10GΩ 93dB - -
RS Stock No. 506-0293
Mfr. Part No.LT1167ACS8#PBF
TWD491.00
Each
units
Dual SOIC Surface Mount - 8 ±12 V, ±15 V, ±3 V, ±5 V, ±9 V No 0.04mV 0 °C +70 °C 1000GΩ 90dB 1MHz 1.3 mA
RS Stock No. 917-3504
Mfr. Part No.LT1167ACS8#PBF
TWD269.80
Each (In a Tube of 100)
units
Dual SOIC Surface Mount - 8 ±12 V, ±15 V, ±3 V, ±5 V, ±9 V - 0.04mV 0 °C +70 °C 1000GΩ 90dB 1MHz 1.3 mA
RS Stock No. 111-2201
Mfr. Part No.AD627ANZ
TWD222.00
Each (In a Tube of 50)
units
Dual, Single PDIP Through Hole 7.5 V 8 ±15V Rail to Rail Output 0.25mV -40 °C +85 °C 20GΩ 77dB - 0.085 mA
RS Stock No. 806-7994
Mfr. Part No.AD8426ACPZ-WP
TWD200.00
Each
units
Dual, Single LFCSP Surface Mount 2.2 36 V 16 ±1.35 ±18V Rail to Rail Output 200µV -40 °C +125 °C 100kΩ 105dB 1MHz 600 (Quiescent) μA
RS Stock No. 660-5351
Mfr. Part No.INA2128UA
TWD425.00
Each
units
Dual SOIC Surface Mount - 16 ±15V No 125µV -40 °C +85 °C 100GΩ 73dB 1.3MHz 1.5 mA
RS Stock No. 523-8581
Mfr. Part No.AD627ANZ
TWD302.00
Each
units
Dual, Single PDIP Through Hole 7.5 V 8 ±15V Rail to Rail Output 0.25mV -40 °C +85 °C 20GΩ 77dB - 0.085 mA
RS Stock No. 923-3555
Mfr. Part No.INA2128UA
TWD370.80
Each (In a Tube of 40)
units
Dual SOIC Surface Mount - 16 ±15V - 125µV -40 °C +85 °C 100GΩ 73dB 1.3MHz 1.5 mA
RS Stock No. 160-1739
Mfr. Part No.AD8426ACPZ-WP
TWD153.60
Each (In a Tray of 64)
units
Dual, Single LFCSP Surface Mount 2.2 36 V 16 ±1.35 ±18V Rail to Rail Output 200µV -40 °C +125 °C 100kΩ 105dB 1MHz 600 (Quiescent) μA