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. 197-7156
Mfr. Part No.INA126UA
TWD97.80
Each (In a Tube of 75)
units
Dual SOIC Surface Mount ±15 V 8 - - 250µV - - - - - -
RS Stock No. 912-8135
Mfr. Part No.AD623ARZ
TWD119.30
Each (In a Tube of 98)
units
Dual, Single SOIC Surface Mount 3 12 V 8 ±2.5 ±6V Rail to Rail Output 200µV -40 °C +85 °C - 90dB 800kHz 500 μA
RS Stock No. 162-5030
Mfr. Part No.INA2141U
TWD572.90
Each (In a Tube of 40)
units
Dual SOIC Surface Mount - 16 ±15V No 0.1mV -40 °C +85 °C 10GΩ 97dB - 1.6 mA
RS Stock No. 197-7473
Mfr. Part No.PGA205AP
TWD603.00
Each
units
Dual PDIP Through Hole ±18 V 16 - No - - - - - 1MHz -
RS Stock No. 660-4857
Mfr. Part No.INA2332AIPWT
TWD92.00
Each
units
Single TSSOP Surface Mount 3 V, 5 V 14 - Rail to Rail Output 8mV -55 °C +125 °C 10000GΩ 60dB - -
RS Stock No. 796-8871
Mfr. Part No.AD8428ARZ
TWD501.00
Each
units
Dual SOIC Surface Mount - 8 ±4 ±18V Rail to Rail Input 100µV -40 °C +85 °C 4kΩ 140dB 3.5MHz 6.8 mA
RS Stock No. 145-6948
Mfr. Part No.INA129PA
TWD204.00
Each (In a Tube of 50)
units
Dual PDIP Through Hole - 8 ±15V No - -40 °C +85 °C 100GΩ 73dB - -
RS Stock No. 912-8154
Mfr. Part No.AD8422ARZ
TWD164.40
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. 912-9949
Mfr. Part No.AD8422BRZ
TWD252.80
Each (In a Tube of 98)
units
Dual SOIC Surface Mount - 8 ±1.8 ±18V Rail to Rail Output 75µV -40 °C +85 °C - 150dB 2.2MHz 30 μA
RS Stock No. 183-2440
Mfr. Part No.AMP04FPZ
TWD628.00
Each
units
Single PDIP Through Hole ±15 V 8 - Rail to Rail Output 600µV -40 °C +85 °C 4GΩ 55dB 70kHz 850 μA
RS Stock No. 159-8114
Mfr. Part No.AD8222ACPZ-WP
TWD261.20
Each (In a Tray of 64)
units
Dual LFCSP VQ Surface Mount - 16 ±2.3 ±18V No 0.15mV -40 °C +85 °C 100GΩ 80dB 1.2MHz 1.2 mA
RS Stock No. 100-3844
Mfr. Part No.INA103KU
TWD319.10
Each (In a Tube of 40)
units
Dual SOIC Surface Mount - 16 ±15V - 0.25mV -40 °C +85 °C 0.06GΩ 100dB 6MHz -
RS Stock No. 158-0332
Mfr. Part No.LT1789IS8-1#PBF
TWD187.30
Each (In a Tube of 100)
units
Single SOIC Surface Mount 3 V, 5 V 8 - Rail to Rail Output 100µV -40 °C +85 °C 1.6GΩ 79dB 60kHz 95 μA
RS Stock No. 153-3399
Mfr. Part No.LT1101CN8#PBF
TWD235.90
Each (In a Tube of 50)
units
Dual, Single PDIP Through Hole 5 V 8 ±15V No 0.22mV 0 °C +70 °C 12GΩ 82dB - 0.12 mA
RS Stock No. 697-7234
Mfr. Part No.AD8223ARZ
TWD93.00
Each (In a Pack of 5)
units
Dual, Single SOIC Surface Mount 3 24 V 8 ±2 ±12V Rail to Rail Output 0.25mV -40 °C +85 °C 2GΩ 80dB - -
RS Stock No. 923-3662
Mfr. Part No.PGA202KP
TWD568.70
Each (In a Tube of 25)
units
Dual PDIP Through Hole - 14 ±15V - 2mV 0 °C +70 °C 10GΩ 80dB 1MHz -
RS Stock No. 160-4531
Mfr. Part No.AD8293G160ARJZ-R7
TWD18.80
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. 170-8128
Mfr. Part No.ISL28535FVZ-T7A
BrandIntersil
TWD164.10
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. 759-1294
Mfr. Part No.AD8236ARMZ
TWD95.00
Each
units
Single MSOP Surface Mount 1.8 5.5 V 8 - Rail to Rail Output 3.5mV -40 °C +125 °C 440GΩ 86dB 23kHz 0.05 mA
RS Stock No. 829-0551
Mfr. Part No.MCP6N16-010E/MS
BrandMicrochip
TWD70.80
Each (In a Pack of 5)
units
Single MSOP Surface Mount 1.8 5.5 V 8 - Rail to Rail Output 22µV -40 °C +125 °C 1kΩ 103dB 5MHz -