Instrumentation Amplifiers

Instrumentation amplifiers (sometimes shortened to In-Amps) are a type of precision gain block used in electronic and measurement test equipment. Instrumentation amplifiers act as a differential amplifier; a type of electronic amplifier that amplifies the voltage difference between two inputs but suppresses any voltage signals that are common to the two inputs. RS Components offer a range of instrumentation amplifiers from several trusted brands in the industry, including Analog Devices, Microchip, Texas Instruments, and more.

How do instrumentation amplifiers work?

Instrumentation amplifiers are almost always composed of 3 op-amps (operational amplifiers) and several resistors. They provide the most important function of CMR (common-mode rejection) by cancelling out any signals that have the same potential as received by both of the inputs. Any signals that have different potentials get amplified. They are used for low frequency signals (such as <1MHz), which they amplify whilst also cutting out any common-mode noise that may be present in the input signal.

What are the instrumentation amplifiers used for?

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. 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.

Typical applications

  • Test & Measurement Industrial Devices
  • Data Acquisition Devices
  • Medical Devices

...
Read more Read less

Filters

Viewing 1 - 20 of 159 products
Results per page
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. 647-643
Mfr. Part No.INA110KP
PHP920.96
Each
units
Dual PDIP Through Hole - 16 ±15V No 500µV -25 °C +85 °C 5000GΩ 106dB 2.5MHz 4.5 mA
RS Stock No. 100-0743
Mfr. Part No.INA110KP
PHP811.881
Each (In a Tube of 25)
units
Dual PDIP Through Hole - 16 ±15V - 500µV -25 °C +85 °C 5000GΩ 106dB 2.5MHz 4.5 mA
RS Stock No. 923-6683
Mfr. Part No.INA333AIDGKT
PHP198.083
Each (On a Reel of 250)
units
Dual, Single MSOP Surface Mount 1.8 5.5 V 8 ±0.9 ±2.75V Rail to Rail Output 0.025mV -40 °C +150 °C 100GΩ 80dB 150kHz 0.075 mA
RS Stock No. 704-4032
Mfr. Part No.INA333AIDGKT
PHP284.52
Each
units
Dual, Single MSOP Surface Mount 1.8 5.5 V 8 ±0.9 ±2.75V Rail to Rail Output 0.025mV -40 °C +150 °C 100GΩ 80dB 150kHz 0.075 mA
RS Stock No. 661-2413
Mfr. Part No.INA326EA/250
PHP251.63
Each
units
Single MSOP Surface Mount 3 V, 5 V 8 - Rail to Rail Input/Output 0.1mV -40 °C +85 °C 10GΩ 100dB - -
RS Stock No. 923-3546
Mfr. Part No.INA126P
PHP187.793
Each (In a Tube of 50)
units
Dual PDIP Through Hole 3 V, 5 V, 9 V, 12 V, 15 V, 18 V, 24 V, 28 V 8 ±15V - 0.25mV -40 °C +85 °C 1GΩ 83dB - 0.2 mA
RS Stock No. 660-5254
Mfr. Part No.INA126P
PHP221.75
Each
units
Dual PDIP Through Hole 3 V, 5 V, 9 V, 12 V, 15 V, 18 V, 24 V, 28 V 8 ±15V No 0.25mV -40 °C +85 °C 1GΩ 83dB - 0.2 mA
RS Stock No. 102-5672
Mfr. Part No.PGA204BP
PHP1,007.906
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. 660-4415
Mfr. Part No.PGA204BP
PHP1,143.73
Each
units
Dual PDIP Through Hole - 16 ±15V No - -40 °C +85 °C 10GΩ 80dB - 7.5 mA
RS Stock No. 252-1593
Mfr. Part No.INA125PA
PHP350.89
Each
units
Dual, Single PDIP Through Hole 5 V 16 ±15V No 0.5mV -55 °C +125 °C 100GΩ 72dB - -
RS Stock No. 288-913
Mfr. Part No.PGA204AU
PHP1,209.74
Each
units
Dual SOIC Surface Mount - 16 ±15V No 125µV -40 °C +85 °C 10GΩ 75dB 1MHz 7.5 mA
RS Stock No. 661-2476
Mfr. Part No.INA129PA
PHP454.30
Each
units
Dual PDIP Through Hole - 8 ±15V No - -40 °C +85 °C 100GΩ 73dB - -
RS Stock No. 461-6542
Mfr. Part No.INA129UA
PHP473.85
Each
units
Dual SOIC Surface Mount - 8 ±15V No 125µV -40 °C +85 °C 100GΩ 73dB 1.3MHz -
RS Stock No. 923-2372
Mfr. Part No.PGA204AP
PHP852.526
Each (In a Tube of 25)
units
Dual PDIP Through Hole - 16 ±15V - 125µV -40 °C +85 °C 10GΩ 75dB 1MHz 7.5 mA
RS Stock No. 100-0741
Mfr. Part No.INA101HP
PHP952.34
Each (In a Tube of 25)
units
Dual PDIP Through Hole - 14 ±15V - 250µV 0 °C +70 °C 10GΩ - 300kHz -
RS Stock No. 145-6948
Mfr. Part No.INA129PA
PHP391.02
Each (In a Tube of 50)
units
Dual PDIP Through Hole - 8 ±15V No - -40 °C +85 °C 100GΩ 73dB - -
RS Stock No. 311-552
Mfr. Part No.PGA204AP
PHP967.77
Each
units
Dual PDIP Through Hole - 16 ±15V No 125µV -40 °C +85 °C 10GΩ 75dB 1MHz 7.5 mA
RS Stock No. 121-8507
Mfr. Part No.INA125PA
PHP297.896
Each (In a Tube of 25)
units
- - - - - - - - - - - - - -
RS Stock No. 121-8274
Mfr. Part No.PGA204AU
PHP1,053.622
Each (In a Tube of 40)
units
Dual SOIC Surface Mount - 16 ±15V - 125µV -40 °C +85 °C 10GΩ 75dB 1MHz 7.5 mA
RS Stock No. 636-227
Mfr. Part No.INA101HP
PHP1,080.96
Each
units
Dual PDIP Through Hole - 14 ±15V No 250µV 0 °C +70 °C 10GΩ - 300kHz -