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. 912-9917
Mfr. Part No.AD8429ARZ
PHP349.946
Each (In a Tube of 98)
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Dual SOIC Surface Mount - 8 ±4 ±18V No 150µV -40 °C +125 °C 1.5GΩ 134dB 15MHz 7 mA
RS Stock No. 764-8747
Mfr. Part No.AD8429ARZ
PHP406.07
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Dual SOIC Surface Mount - 8 ±4 ±18V No 150µV -40 °C +125 °C 1.5GΩ 134dB 15MHz 7 mA
RS Stock No. 159-7767
Mfr. Part No.AD627BNZ
PHP456.239
Each (In a Tube of 50)
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Dual, Single PDIP Through Hole 7.5 V 8 ±15V Rail to Rail Output 0.15mV -40 °C +85 °C 20GΩ 83dB - 0.085 mA
RS Stock No. 779-8969
Mfr. Part No.LT1025CN8#PBF
PHP301.94
Each (In a Pack of 2)
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Single CDIP Through Hole 4 to 36 V 8 - No - 0 °C +70 °C - - - 150 μA
RS Stock No. 912-6224
Mfr. Part No.AD8220ARMZ
PHP275.839
Each (In a Tube of 50)
units
Dual, Single MSOP Surface Mount 4.5 36 V 8 ±2.25 ±18V Rail to Rail Output 0.3mV -40 °C +85 °C - 74dB 1.5MHz -
RS Stock No. 102-5672
Mfr. Part No.PGA204BP
PHP887.898
Each (In a Tube of 25)
units
Dual PDIP Through Hole - 16 ±15V - - -40 °C +85 °C 10GΩ 80dB - 7.5 mA
RS Stock No. 523-8200
Mfr. Part No.AD622ANZ
PHP398.57
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. 145-6601
Mfr. Part No.LT1025CN8#PBF
PHP187.48
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. 111-2076
Mfr. Part No.AD622ANZ
PHP340.189
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. 660-4415
Mfr. Part No.PGA204BP
PHP1,008.43
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Dual PDIP Through Hole - 16 ±15V No - -40 °C +85 °C 10GΩ 80dB - 7.5 mA
RS Stock No. 806-7988
Mfr. Part No.AD8421ARMZ
PHP307.64
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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. 121-6904
Mfr. Part No.AD8421ARMZ
PHP261.047
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. 106-6379
Mfr. Part No.AD595AQ
PHP923.913
Each (In a Tube of 25)
units
Dual, Single CDIP Through Hole 5 V 14 ±15V - - -55 °C +125 °C - - 15kHz -
RS Stock No. 709-6067
Mfr. Part No.AD627BNZ
PHP588.53
Each
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Dual, Single PDIP Through Hole 7.5 V 8 ±15V Rail to Rail Output 0.15mV -40 °C +85 °C 20GΩ 83dB - 0.085 mA
RS Stock No. 301-779
Mfr. Part No.AD595AQ
PHP1,057.59
Each
units
Dual, Single CDIP Through Hole 5 V 14 ±15V No - -55 °C +125 °C - - 15kHz -
RS Stock No. 697-7228
Mfr. Part No.AD8220ARMZ
PHP308.29
Each
units
Dual, Single MSOP Surface Mount 12 V, 15 V, 18 V, 24 V, 28 V, 5 V, 9 V 8 ±12 V, ±15 V, ±3 V, ±5 V, ±9 V Rail to Rail Output 0.3mV -40 °C +85 °C - 74dB 1.5MHz -
RS Stock No. 912-6132
Mfr. Part No.AD623BRZ
PHP334.698
Each (In a Tube of 98)
units
Dual, Single SOIC Surface Mount 3 V, 5 V, 9 V 8 ±3 V, ±5 V Rail to Rail Output 0.1mV -40 °C +85 °C 2GΩ 77dB - -
RS Stock No. 111-1133
Mfr. Part No.AD621ANZ
PHP584.33
Each (In a Tube of 50)
units
Dual PDIP Through Hole - 8 ±12 V, ±15 V, ±3 V, ±5 V, ±9 V - 0.25mV -40 °C +85 °C 10GΩ 93dB - -
RS Stock No. 912-6221
Mfr. Part No.AD8221ARZ
PHP258.308
Each (In a Tube of 98)
units
Dual SOIC Surface Mount - 8 ±12 V, ±15 V, ±3 V, ±5 V, ±9 V No 0.06mV -40 °C +125 °C 100GΩ 130dB 825kHz 1 mA
RS Stock No. 697-7265
Mfr. Part No.AD8295ACPZ-WP
PHP338.55
Each
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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 - -
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