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. 912-7069
Mfr. Part No.AD597ARZ
$9.617
Each (In a Tube of 98)
units
Single SOIC Surface Mount 5 → 30 V 8 - No - -55 °C +125 °C - - 15kHz -
RS Stock No. 230-646
Mfr. Part No.AD597ARZ
$12.91
Each
units
Single SOIC Surface Mount 5 → 30 V 8 - No - -55 °C +125 °C - - 15kHz -
RS Stock No. 523-8575
Mfr. Part No.AD623ANZ
$10.44
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. 111-2200
Mfr. Part No.AD623ANZ
$6.74
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. 106-7014
Mfr. Part No.AD595CQ
$30.962
Each (In a Tube of 25)
units
Dual, Single CDIP Through Hole 5 V 14 ±15V - - -55 °C +125 °C - - 15kHz -
RS Stock No. 169-8737
Mfr. Part No.AD595CQ
$36.90
Each
units
Dual, Single CDIP Through Hole 5 V 14 ±15V No - -55 °C +125 °C - - 15kHz -
RS Stock No. 160-4531
Mfr. Part No.AD8293G160ARJZ-R7
$1.16
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. 819-7332
Mfr. Part No.AD8293G160ARJZ-R7
$2.392
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. 159-8116
Mfr. Part No.AD8226BRZ
$4.981
Each (In a Tube of 98)
units
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. 912-9841
Mfr. Part No.AD8497ARMZ
$7.536
Each (In a Tube of 50)
units
Dual, Single MSOP Surface Mount 2.7 → 36 V 8 ±2.7 → ±18V Rail to Rail Output - -40 °C +125 °C - - 25kHz 0.25 mA
RS Stock No. 759-2578
Mfr. Part No.AD8497ARMZ
$8.35
Each
units
Dual, Single MSOP Surface Mount 2.7 → 36 V 8 ±2.7 → ±18V Rail to Rail Output - -40 °C +125 °C - - 25kHz 0.25 mA
RS Stock No. 759-0024
Mfr. Part No.AD8226BRZ
$8.44
Each
units
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. 523-6412
Mfr. Part No.AD8221ARMZ
$9.48
Each
units
Dual, Single LFCSP Surface Mount 3 V, 5 V, 9 V 8 ±3 V, ±5 V Rail to Rail Output 2.7mV -40 °C +125 °C 0.8MΩ 62dB - -
RS Stock No. 759-0099
Mfr. Part No.AD8495CRMZ
$11.60
Each
units
Dual, Single MSOP Surface Mount 2.7 → 36 V 8 ±2.7 → ±18V Rail to Rail Output - -40 °C +125 °C - - 25kHz 0.25 mA
RS Stock No. 522-9717
Mfr. Part No.AD620ANZ
$18.23
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. 106-6379
Mfr. Part No.AD595AQ
$22.392
Each (In a Tube of 25)
units
Dual, Single CDIP Through Hole 5 V 14 ±15V - - -55 °C +125 °C - - 15kHz -
RS Stock No. 106-7012
Mfr. Part No.AD594AQ
$22.398
Each (In a Tube of 25)
units
Dual, Single CDIP Through Hole 5 V 14 ±15V - - -55 °C +125 °C - - 15kHz -
RS Stock No. 111-1132
Mfr. Part No.AD620ANZ
$11.30
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. 113-0792
Mfr. Part No.AD594AQ
$28.50
Each
units
Dual, Single CDIP Through Hole 5 V 14 ±15V No - -55 °C +125 °C - - 15kHz -
RS Stock No. 301-779
Mfr. Part No.AD595AQ
$29.97
Each
units
Dual, Single CDIP Through Hole 5 V 14 ±15V No - -55 °C +125 °C - - 15kHz -