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. 106-6379
Mfr. Part No.AD595AQ
HK$156.408
Each (In a Tube of 25)
units
Dual, Single CDIP Through Hole 5 V 14 ±15V - - -55 °C +125 °C - - 15kHz -
RS Stock No. 923-2284
Mfr. Part No.INA114AU
HK$79.75
Each (In a Tube of 40)
units
Dual SOL Surface Mount - 16 ±12 V, ±15 V, ±3 V, ±5 V, ±9 V - 125µV -40 °C +85 °C 10GΩ 110dB 1MHz 3 mA
RS Stock No. 165-4166
Mfr. Part No.MCP6N16-100E/MS
BrandMicrochip
HK$13.09
Each (In a Tube of 100)
units
Single MSOP Surface Mount 1.8 5.5 V 8 - Rail to Rail Output 17µV -40 °C +125 °C 1kΩ 112dB 35MHz -
RS Stock No. 102-5658
Mfr. Part No.INA331IDGKT
HK$14.792
Each (On a Reel of 250)
units
Single MSOP Surface Mount 3 V, 5 V 8 - Rail to Rail Output 0.5mV -55 °C +125 °C 10000GΩ 90dB - -
RS Stock No. 145-6601
Mfr. Part No.LT1025CN8#PBF
HK$34.927
Each (In a Tube of 50)
units
Single CDIP Through Hole 4 36 V 8 - No - 0 °C +70 °C - - - 150 μA
RS Stock No. 522-9717
Mfr. Part No.AD620ANZ
HK$91.46
Each
units
Dual PDIP Through Hole - 8 ±12 V, ±15 V, ±3 V, ±5 V, ±9 V No 0.125mV -40 °C +85 °C 10GΩ 73dB 1MHz -
RS Stock No. 545-5770
Mfr. Part No.LTK001CN8#PBF
HK$123.22
Each
units
- PDIP Through Hole - 8 - - - 0 °C +70 °C - - - -
RS Stock No. 921-2892
Mfr. Part No.INA826AID
HK$20.321
Each (In a Tube of 75)
units
Dual, Single SOIC Surface Mount 2.7 36 V 8 ±1.35 ±18V Rail to Rail Output 150µV -40 °C +125 °C - 80dB 1MHz 200 μA
RS Stock No. 912-9999
Mfr. Part No.AD8421BRMZ
HK$77.734
Each (In a Tube of 50)
units
Dual, Single MSOP Surface Mount 5 36 V 8 ±2.5 ±18V Rail to Rail Input 25µV -40 °C +125 °C 4kΩ 100dB 10MHz 2.6 mA
RS Stock No. 806-7988
Mfr. Part No.AD8421ARMZ
HK$48.20
Each
units
Dual, Single MSOP Surface Mount 5 6 V 8 ±2.5 ±18V - 60µV -40 °C +85 °C 20kΩ 134dB 10MHz 2.3 mA
RS Stock No. 153-3424
Mfr. Part No.LTK001CN8#PBF
HK$78.696
Each (In a Tube of 50)
units
- PDIP Through Hole - 8 - - - 0 °C +70 °C - - - -
RS Stock No. 813-6558
Mfr. Part No.INA826AID
HK$25.998
Each (In a Pack of 5)
units
Dual, Single SOIC Surface Mount 2.7 36 V 8 ±1.35 ±18V Rail to Rail Output 150µV -40 °C +125 °C - 80dB 1MHz 200 μA
RS Stock No. 523-6248
Mfr. Part No.AD623ARMZ
HK$39.92
Each
units
Dual, Single MSOP Surface Mount 3 V, 5 V, 9 V 8 ±3 V, ±5 V Rail to Rail Output 0.5mV -40 °C +85 °C 2GΩ 70dB - -
RS Stock No. 311-530
Mfr. Part No.INA131AP
HK$84.54
Each
units
Dual, Single PDIP Through Hole 5 V, 9 V, 12 V, 15 V, 18 V, 24 V, 28 V 8 ±15V No 0.125mV -40 °C +85 °C 10GΩ 106dB - 3 mA
RS Stock No. 779-8969
Mfr. Part No.LT1025CN8#PBF
HK$50.96
Each (In a Pack of 2)
units
Single CDIP Through Hole 4 to 36 V 8 - No - 0 °C +70 °C - - - 150 μA
RS Stock No. 523-6412
Mfr. Part No.AD8221ARMZ
HK$53.23
Each
units
Dual, Single LFCSP Surface Mount 3 V, 5 V, 9 V 8 ±3 V, ±5 V Rail to Rail Output 2.7mV -40 °C +125 °C 0.8MΩ 62dB - -
RS Stock No. 796-8877
Mfr. Part No.AD8421BRZ
HK$101.89
Each
units
Dual, Single SOIC Surface Mount 5 36 V 8 ±2.5 ±18V No 25µV -40 °C +125 °C 4kΩ 100dB 10MHz 2.6 mA
RS Stock No. 111-1152
Mfr. Part No.AD623ARMZ
HK$30.324
Each (In a Tube of 50)
units
Dual, Single MSOP Surface Mount 3 V, 5 V, 9 V 8 ±3 V, ±5 V Rail to Rail Output 0.5mV -40 °C +85 °C 2GΩ 70dB - -
RS Stock No. 796-8874
Mfr. Part No.AD8421BRMZ
HK$93.25
Each
units
Dual, Single MSOP Surface Mount 5 36 V 8 ±2.5 ±18V Rail to Rail Input 25µV -40 °C +125 °C 4kΩ 100dB 10MHz 2.6 mA
RS Stock No. 851-6884
Mfr. Part No.LTC2053HMS8#PBF
HK$81.38
Each
units
Dual, Single MSOP Surface Mount 2.7 6 V 8 ±5.5V Rail to Rail Output ±10µV -40 °C +125 °C - 116dB 200kHz 1 mA
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