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. 427-288
Mfr. Part No.AD627BRZ
PHP487.20
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Dual, Single SOIC Surface Mount 7.5 V 8 ±15V Rail to Rail Output 0.15mV -40 °C +85 °C 20GΩ 83dB - 0.085 mA
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Mfr. Part No.AD594AQ
PHP1,857.33
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RS Stock No. 311-552
Mfr. Part No.PGA204AP
PHP862.18
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Dual PDIP Through Hole - 16 ±15V No 125µV -40 °C +85 °C 10GΩ 75dB 1MHz 7.5 mA
RS Stock No. 302-463
Mfr. Part No.AD524AD
PHP2,316.43
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Dual SBCDIP Through Hole - 16 ±15V No 0.25mV -40 °C +85 °C 1GΩ 70dB 25MHz -
RS Stock No. 806-7985
Mfr. Part No.AD8422ARZ
PHP303.98
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Dual, Single SOIC Surface Mount 3.6 → 36 V 8 ±1.8 → ±18V Rail to Rail Output 60µV -40 °C +85 °C 10kΩ 80dB 2.2MHz 1 nA
RS Stock No. 538-7217
Mfr. Part No.AD8225ARZ
PHP345.88
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Dual, Single SOIC Surface Mount 3.4 → 36 V 8 ±1.7 → ±18V No 0.375mV -40 °C +85 °C 10GΩ 86dB - 1.2 mA
RS Stock No. 912-8772
Mfr. Part No.AD627BRZ
PHP372.798
Each (In a Tube of 98)
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Dual, Single SOIC Surface Mount 7.5 V 8 ±15V Rail to Rail Output 0.15mV -40 °C +85 °C 20GΩ 83dB - 0.085 mA
RS Stock No. 660-5279
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PHP416.07
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Dual PDIP Through Hole - 8 ±15V No - -40 °C +85 °C 100GΩ 80dB - -
RS Stock No. 660-5395
Mfr. Part No.INA2141UA
PHP681.98
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Dual SOIC Surface Mount - 16 ±15V No 0.25mV -40 °C +85 °C 10GΩ 93dB - 1.6 mA
RS Stock No. 522-9739
Mfr. Part No.AD621ANZ
PHP636.40
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Dual PDIP Through Hole - 8 ±12 V, ±15 V, ±3 V, ±5 V, ±9 V No 0.25mV -40 °C +85 °C 10GΩ 93dB - -
RS Stock No. 162-5031
Mfr. Part No.INA2141UA
PHP600.99
Each (In a Tube of 40)
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Dual SOIC Surface Mount - 16 ±15V No 0.25mV -40 °C +85 °C 10GΩ 93dB - 1.6 mA
RS Stock No. 923-2372
Mfr. Part No.PGA204AP
PHP759.418
Each (In a Tube of 25)
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Dual PDIP Through Hole - 16 ±15V - 125µV -40 °C +85 °C 10GΩ 75dB 1MHz 7.5 mA
RS Stock No. 912-8154
Mfr. Part No.AD8422ARZ
PHP240.61
Each (In a Tube of 98)
units
Dual, Single SOIC Surface Mount 3.6 → 36 V 8 ±1.8 → ±18V Rail to Rail Output 60µV -40 °C +85 °C 10kΩ 80dB 2.2MHz 1 nA
RS Stock No. 759-0024
Mfr. Part No.AD8226BRZ
PHP250.43
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Dual, Single SOIC Surface Mount 2.2 → 36 V 8 ±1.35 → ±18V Rail to Rail Output 50µV -40 °C +125 °C 100kΩ 80dB 1.5MHz 350 μA
RS Stock No. 159-7741
Mfr. Part No.AD8227BRZ
PHP157.127
Each (In a Tube of 98)
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Dual, Single SOIC Surface Mount 2.2 → 36 V 8 ±1.5 → ±18V Rail to Rail Output 0.1mV -40 °C +125 °C 0.8GΩ 80dB 250kHz 0.6 mA
RS Stock No. 158-0523
Mfr. Part No.AD8295ACPZ-WP
PHP315.099
Each (In a Tray of 64)
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Dual LFCSP Surface Mount - 16 ±12 V, ±15 V, ±3 V, ±5 V, ±9 V No 0.12mV -40 °C +85 °C 100GΩ 80dB - -
RS Stock No. 100-3799
Mfr. Part No.INA122PA
PHP255.234
Each (In a Tube of 50)
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Dual, Single PDIP Through Hole 5 V 8 ±12 V, ±15 V, ±3 V, ±5 V, ±9 V Rail to Rail Output 0.5mV -40 °C +85 °C 10GΩ 76dB - 0.085 mA
RS Stock No. 252-1593
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PHP287.66
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Dual, Single PDIP Through Hole 5 V 16 ±15V No 0.5mV -55 °C +125 °C 100GΩ 72dB - -
RS Stock No. 145-6919
Mfr. Part No.LTC1043CSW#PBF
PHP236.689
Each (In a Tube of 40)
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- SOIC W Surface Mount - 18 - - - -40 °C +85 °C - - - -
RS Stock No. 759-0875
Mfr. Part No.AD623BNZ
PHP371.50
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Dual, Single PDIP Through Hole 2.7 → 12 V 8 ±2.5 → ±6V Rail to Rail Output 0.1mV -40 °C +85 °C 2GΩ - 800kHz 0.55 mA
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