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. 154-7684
Mfr. Part No.LT1025CS8#PBF
kr 40,094
Each (In a Tube of 100)
Units
Single SO-8 Through Hole 4 → 36 V 8 - No - 0 °C +70 °C - - - 150 μA
RS Stock No. 923-6683
Mfr. Part No.INA333AIDGKT
kr 26,076
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. 779-8978
Mfr. Part No.LT1025CS8#PBF
kr 62,165
Each (In a Pack of 2)
Units
Single SO-8 Through Hole 4 to 36 V 8 - No - 0 °C +70 °C - - - 150 μA
RS Stock No. 704-4032
Mfr. Part No.INA333AIDGKT
kr 41,57
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. 158-0521
Mfr. Part No.AD8223ARMZ
kr 27,381
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. 819-7323
Mfr. Part No.AD8223ARMZ-R7
kr 31,684
Each (In a Pack of 5)
Units
Dual, Single MSOP Surface Mount 3 24 V 8 ±2 ±12V Rail to Rail Output 250µV -40 °C +85 °C - 90dB 125kHz 28 nA
RS Stock No. 697-7230
Mfr. Part No.AD8223ARMZ
kr 33,27
Each
Units
Dual, Single MSOP Surface Mount 12 V, 15 V, 18 V, 5 V, 9 V 8 ±3 V, ±5 V, ±9 V Rail to Rail Output 0.25mV -40 °C +85 °C 2GΩ 80dB - -
RS Stock No. 160-4529
Mfr. Part No.AD8223ARMZ-R7
kr 18,184
Each (On a Reel of 1000)
Units
Dual, Single MSOP Surface Mount 3 24 V 8 ±2 to ±12V Rail to Rail Output 250µV -40 °C +85 °C - 90dB 125kHz 500 μA
RS Stock No. 709-5083
Mfr. Part No.AD8251ARMZ
kr 96,01
Each
Units
Dual MSOP Surface Mount - 10 ±12 V, ±9 V No - -40 °C +85 °C - 80dB - -
RS Stock No. 100-3802
Mfr. Part No.INA122UA
kr 45,829
Each (In a Tube of 75)
Units
Dual, Single SOIC Surface Mount 5 V 8 ±12 V, ±15 V, ±3 V, ±5 V, ±9 V Rail to Rail Output 0.5mV -40 °C +85 °C 10GΩ 76dB - 0.085 mA
RS Stock No. 912-7069
Mfr. Part No.AD597ARZ
kr 58,867
Each (In a Tube of 98)
Units
Single SOIC Surface Mount 5 30 V 8 - No - -55 °C +125 °C - - 15kHz -
RS Stock No. 207-2388
Mfr. Part No.INA128PA
kr 70,98
Each
Units
Dual PDIP Through Hole - 8 ±15V No 125µV -40 °C +85 °C 100GΩ 73dB 1.3MHz -
RS Stock No. 709-6067
Mfr. Part No.AD627BNZ
kr 98,70
Each
Units
Dual, Single PDIP Through Hole 7.5 V 8 ±15V Rail to Rail Output 0.15mV -40 °C +85 °C 20GΩ 83dB - 0.085 mA
RS Stock No. 709-7086
Mfr. Part No.AD8253ARMZ
kr 94,62
Each
Units
Dual MSOP Surface Mount - 10 ±12 V, ±9 V No 150µV -40 °C +85 °C 0.00002GΩ 80dB 10MHz -
RS Stock No. 912-7946
Mfr. Part No.AD8253ARMZ
kr 77,706
Each (In a Tube of 50)
Units
Dual MSOP Surface Mount - 10 ±12 V, ±9 V No 150µV -40 °C +85 °C 0.00002GΩ 80dB 10MHz -
RS Stock No. 177-7115
Mfr. Part No.EL8170FSZ
BrandIntersil
kr 13,734
Each (In a Tube of 97)
Units
Single SOIC Surface Mount 3 V, 5 V 8 - Rail to Rail Input/Output 0.2mV -40 °C +125 °C - 90dB - 0.095 mA
RS Stock No. 545-5405
Mfr. Part No.LTC1043CSW#PBF
kr 69,59
Each
Units
- SOIC W Surface Mount - 18 - - - -40 °C +85 °C - - - -
RS Stock No. 100-0759
Mfr. Part No.INA128PA
kr 60,955
Each (In a Tube of 50)
Units
Dual PDIP Through Hole - 8 ±15V - 125µV -40 °C +85 °C 100GΩ 73dB 1.3MHz -
RS Stock No. 923-3537
Mfr. Part No.INA125U
kr 53,24
Each (In a Tube of 40)
Units
Dual, Single SOIC Surface Mount 5 V 16 ±15V - 0.25mV -55 °C +125 °C 100GΩ 78dB - -
RS Stock No. 912-6233
Mfr. Part No.AD8223BRZ
kr 27,434
Each (In a Tube of 98)
Units
Dual, Single SOIC Surface Mount 3 24 V 8 ±2 ±12V Rail to Rail Output 0.1mV -40 °C +85 °C 2GΩ 86dB - -
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Description:
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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 ...