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. 100-0741
Mfr. Part No.INA101HP
HK$144.991
Each (In a Tube of 25)
units
Dual PDIP Through Hole - 14 ±15V - 250µV 0 °C +70 °C 10GΩ - 300kHz -
RS Stock No. 660-4872
Mfr. Part No.INA337AIDGKT
HK$45.34
Each
units
Single MSOP Surface Mount 3 V, 5 V 8 - No 0.1mV -40 °C +125 °C 10GΩ 106dB - -
RS Stock No. 709-5765
Mfr. Part No.AD524BDZ
HK$431.70
Each
units
Dual SBCDIP Through Hole - 16 ±15V No 0.1mV -40 °C +85 °C 1GΩ 75dB 25MHz -
RS Stock No. 100-3847
Mfr. Part No.INA128UA
HK$60.211
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. 183-1717
Mfr. Part No.AD623ARMZ-REEL7
HK$24.019
Each (On a Reel of 1000)
units
Dual, Single MSOP Surface Mount 2.7 12 V 8 ±2.5 to ±6V Rail to Rail Output 500µV -40 °C +85 °C - 105dB 800kHz 550 μA
RS Stock No. 912-8135
Mfr. Part No.AD623ARZ
HK$27.754
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. 159-8116
Mfr. Part No.AD8226BRZ
HK$30.605
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. 913-0771
Mfr. Part No.AD524BDZ
HK$729.803
Each (In a Tube of 23)
units
Dual SBCDIP Through Hole - 16 ±15V No 0.1mV -40 °C +85 °C 1GΩ 75dB 25MHz -
RS Stock No. 759-0866
Mfr. Part No.AD622ARZ-R7
HK$57.03
Each
units
Dual SOIC Surface Mount - 8 ±2.6 ±15V No 0.125mV -40 °C +85 °C 10GΩ 66dB 1MHz 1.5 mA
RS Stock No. 660-6512
Mfr. Part No.INA121UA
HK$52.67
Each
units
Dual SOIC Surface Mount - 8 ±15V No - -40 °C +85 °C 1000GΩ 72dB - 0.525 mA
RS Stock No. 121-7250
Mfr. Part No.ISL28533FVZ-T7A
BrandIntersil
HK$55.18
Each
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
New
RS Stock No. 197-7158
Mfr. Part No.INA128P
HK$84.42
Each (In a Tube of 50)
units
Dual PDIP Through Hole ±15 V 8 - - 50µV - - - - - -
RS Stock No. 912-7167
Mfr. Part No.AD627ARZ
HK$44.276
Each (In a Tube of 98)
units
Dual, Single SOIC Surface Mount 7.5 V 8 ±15V Rail to Rail Output 0.25mV -40 °C +85 °C 20GΩ 77dB - 0.085 mA
RS Stock No. 159-7890
Mfr. Part No.AD8556ARZ
HK$50.735
Each (In a Tube of 98)
units
Single SOIC Surface Mount 5 V 8 - Rail to Rail Input/Output 0.012mV -40 °C +140 °C - 80dB 8MHz 2.78 mA
RS Stock No. 661-2381
Mfr. Part No.INA126E/250
HK$36.31
Each
units
Dual MSOP Surface Mount 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. 759-1281
Mfr. Part No.AD8227ARZ
HK$23.36
Each
units
Dual, Single SOIC Surface Mount 2.2 36 V 8 ±1.5 ±18V Rail to Rail Output 0.2mV -40 °C +125 °C 0.8GΩ 90dB 250kHz 0.425 mA
RS Stock No. 806-8017
Mfr. Part No.AD8494CRMZ
HK$83.36
Each (In a Pack of 2)
units
Dual, Single MSOP Surface Mount 2.7 36 V 8 ±2.7 ±18V - - -40 °C +125 °C 60kΩ - 30kHz 250 μA
RS Stock No. 778-5105
Mfr. Part No.AD8237ARMZ
HK$21.385
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. 121-9391
Mfr. Part No.INA333AIDRGT
HK$27.065
Each (On a Reel of 250)
units
Dual, Single SON Surface Mount 1.8 to 5.5 V 8 ±0.9 to ±2.75V Rail to Rail Output ±25µV -40 °C +125 °C - 80dB 150kHz -
RS Stock No. 759-0033
Mfr. Part No.AD8227ARMZ
HK$23.36
Each
units
Dual, Single MSOP Surface Mount 2.2 36 V 8 ±1.5 ±18V Rail to Rail Output 0.2mV -40 °C +125 °C 0.8GΩ 90dB 250kHz 0.425 mA
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