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. 302-463
Mfr. Part No.AD524AD
PHP2,013.03
Each
units
Dual SBCDIP Through Hole - 16 ±15V No 0.25mV -40 °C +85 °C 1GΩ 70dB 25MHz -
RS Stock No. 806-7994
Mfr. Part No.AD8426ACPZ-WP
PHP256.21
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. 912-7381
Mfr. Part No.AD620ARZ
PHP334.204
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. 111-1152
Mfr. Part No.AD623ARMZ
PHP169.582
Each (In a Tube of 50)
units
Dual, Single MSOP Surface Mount 3 V, 5 V, 9 V 8 ±3 V, ±5 V Rail to Rail Output 0.5mV -40 °C +85 °C 2GΩ 70dB - -
RS Stock No. 923-3593
Mfr. Part No.PGA204BU
PHP855.554
Each (In a Tube of 40)
units
Dual SOIC Surface Mount - 16 ±15V - 50µV -40 °C +85 °C 10GΩ 80dB 1MHz 6.5 mA
RS Stock No. 145-6948
Mfr. Part No.INA129PA
PHP288.381
Each (In a Tube of 50)
units
Dual PDIP Through Hole - 8 ±15V No - -40 °C +85 °C 100GΩ 73dB - -
RS Stock No. 113-0792
Mfr. Part No.AD594AQ
PHP939.42
Each
units
Dual, Single CDIP Through Hole 5 V 14 ±15V No - -55 °C +125 °C - - 15kHz -
RS Stock No. 100-0741
Mfr. Part No.INA101HP
PHP848.734
Each (In a Tube of 25)
units
Dual PDIP Through Hole - 14 ±15V - 250µV 0 °C +70 °C 10GΩ - 300kHz -
RS Stock No. 145-6919
Mfr. Part No.LTC1043CSW#PBF
PHP236.689
Each (In a Tube of 40)
units
- SOIC W Surface Mount - 18 - - - -40 °C +85 °C - - - -
RS Stock No. 806-7985
Mfr. Part No.AD8422ARZ
PHP303.98
Each
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. 697-6962
Mfr. Part No.AD623BRZ
PHP378.53
Each
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. 159-8116
Mfr. Part No.AD8226BRZ
PHP165.933
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. 877-8830
Mfr. Part No.AD8290ACPZ-R2
PHP152.585
Each (In a Pack of 2)
units
Single LFCSP Surface Mount 2.6 → 5.5 V 16 - Rail to Rail Output - -40 °C +85 °C - 110dB 250Hz -
RS Stock No. 158-0365
Mfr. Part No.LTC2053IDD#PBF
PHP309.718
Each (In a Tube of 121)
units
Dual, Single DFN Surface Mount 2.7 V 8 ±5V Rail to Rail Input/Output ±10µV -40 °C +85 °C - 105dB 200kHz 1 mA
RS Stock No. 121-9041
Mfr. Part No.INA131BP
PHP513.876
Each (In a Tube of 50)
units
Dual, Single PDIP Through Hole 5 V, 9 V, 12 V, 15 V, 18 V, 24 V, 28 V 8 ±15V - 0.05mV -40 °C +85 °C 10GΩ 110dB - 3 mA
RS Stock No. 778-5105
Mfr. Part No.AD8237ARMZ
PHP133.88
Each (In a Pack of 2)
units
Single MSOP Surface Mount 1.8 to 5.5 V 8 - Rail to Rail Input/Output 75µV -40 °C +125 °C - 106dB 6MHz 115 μA
RS Stock No. 661-2457
Mfr. Part No.INA115BU
PHP686.22
Each
units
Dual SOIC Surface Mount - 16 ±15V No - -40 °C +85 °C 10GΩ 80dB - 3 mA
RS Stock No. 170-8126
Mfr. Part No.ISL28533FVZ-T7A
BrandIntersil
PHP196.748
Each (On a Reel of 250)
units
Dual, Single TSSOP Surface Mount 2.5 → 5.5 V 14 ±1.25 → ±2.75V Rail to Rail Input/Output 10µV -40 °C +125 °C - 80dB 3MHz 3.5 mA
RS Stock No. 158-0521
Mfr. Part No.AD8223ARMZ
PHP120.249
Each (In a Tube of 50)
units
Dual, Single MSOP Surface Mount 5 V, 9 V, 12 V, 15 V, 18 V 8 ±3 V, ±5 V, ±9 V Rail to Rail Output 0.25mV -40 °C 85 °C 2GΩ 80dB - -
RS Stock No. 545-5657
Mfr. Part No.LTC1043CN#PBF
PHP296.94
Each
units
- PDIP Through Hole - 18 - - - -40 °C +85 °C - - - -
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