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. 912-8154
Mfr. Part No.AD8422ARZ
£3.783
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. 912-9933
Mfr. Part No.AD8237ARMZ
£1.49
Each (In a Tube of 50)
Units
Single MSOP Surface Mount 1.8 5.5 V 8 - Rail to Rail Input/Output 75µV -40 °C +125 °C - 106dB 6MHz 115 μA
RS Stock No. 165-3495
Mfr. Part No.MCP6N11-001E/SN
BrandMicrochip
£0.789
Each (In a Tube of 100)
Units
Single SOIC Surface Mount 1.8 5.5 V 8 - Rail to Rail Input/Output 0.35V -40 °C +125 °C - 70dB 500kHz 0.8 mA
RS Stock No. 100-3847
Mfr. Part No.INA128UA
£5.474
Each (In a Tube of 75)
Units
Dual SOIC Surface Mount - 8 ±15V - 125µV -40 °C +85 °C 100GΩ 73dB 1.3MHz -
RS Stock No. 778-5105
Mfr. Part No.AD8237ARMZ
£1.945
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. 165-9393
Mfr. Part No.MAX31855RASA+
£4.841
Each (In a Tube of 10)
Units
Single SOIC Surface Mount 3.3 V 8 - No - -50 °C +1770 °C - - - 1500 μA
RS Stock No. 806-7985
Mfr. Part No.AD8422ARZ
£4.94
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. 461-6536
Mfr. Part No.INA128UA
£6.88
Each
Units
Dual SOIC Surface Mount - 8 ±15V No 125µV -40 °C +85 °C 100GΩ 73dB 1.3MHz -
RS Stock No. 814-3742
Mfr. Part No.PGA280AIPW
£5.56
Each
Units
Single TSSOP Surface Mount 40 V 24 - Rail to Rail Input/Output 250µV -40 °C +125 °C - 140dB 6MHz ±10 mA
RS Stock No. 111-2076
Mfr. Part No.AD622ANZ
£5.018
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. 759-1294
Mfr. Part No.AD8236ARMZ
£2.09
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. 923-3593
Mfr. Part No.PGA204BU
£13.355
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. 523-8200
Mfr. Part No.AD622ANZ
£6.30
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. 121-9396
Mfr. Part No.PGA280AIPW
£4.655
Each (In a Tube of 60)
Units
Single TSSOP Surface Mount 40 V 24 - Rail to Rail Input/Output 250µV -40 °C +125 °C - 140dB 6MHz ±10 mA
RS Stock No. 660-5604
Mfr. Part No.PGA204BU
£15.16
Each
Units
Dual SOIC Surface Mount - 16 ±15V No 50µV -40 °C +85 °C 10GΩ 80dB - 6.5 mA
RS Stock No. 759-0024
Mfr. Part No.AD8226BRZ
£3.82
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. 159-8116
Mfr. Part No.AD8226BRZ
£2.784
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. 783-3882
Mfr. Part No.MAX31855NASA+
£3.16
Each
Units
Single SOIC Surface Mount 3.3 V 8 - No - -200 °C +1300 °C - - - 1500 μA
RS Stock No. 146-1066
Mfr. Part No.MAX31855NASA+
£3.174
Each (In a Tube of 10)
Units
Single SOIC Surface Mount 3.3 V 8 - No - -200 °C +1300 °C - - - 1500 μA
RS Stock No. 923-2379
Mfr. Part No.INA131AP
£6.638
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 - 0.125mV -40 °C +85 °C 10GΩ 106dB - 3 mA
Related Products
The Instrumentation Amplifier ICs amplify the difference between ...
Description:
The Instrumentation Amplifier ICs amplify the difference between two input signal voltages, while rejecting any signals that are common to both inputs. The DC precision and gain accuracy is maintained within a noisy environment, and also where large common-mode signals (AC power line frequency) are present.
The Instrumentation Amplifier ICs amplify the difference between ...
Description:
The Instrumentation Amplifier ICs amplify the difference between two input signal voltages, while rejecting any signals that are common to both inputs. The DC precision and gain accuracy is maintained within a noisy environment, and also where large common-mode signals (AC power line frequency) are present.
The Instrumentation Amplifier ICs amplify the difference between ...
Description:
The Instrumentation Amplifier ICs amplify the difference between two input signal voltages, while rejecting any signals that are common to both inputs. The DC precision and gain accuracy is maintained within a noisy environment, and also where large common-mode signals (AC power line frequency) are present.
The Instrumentation Amplifier ICs amplify the difference between ...
Description:
The Instrumentation Amplifier ICs amplify the difference between two input signal voltages, while rejecting any signals that are common to both inputs. The DC precision and gain accuracy is maintained within a noisy environment, and also where large common-mode signals (AC power line frequency) are present.