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. 100-3846
Mfr. Part No.INA118UB
HK$130.62
Each (In a Tube of 75)
units
Dual SOIC Surface Mount - 8 ±15V - 50µV -40 °C +125 °C 10GΩ 80dB 800kHz 0.385 mA
RS Stock No. 764-8747
Mfr. Part No.AD8429ARZ
HK$67.44
Each
units
Dual SOIC Surface Mount - 8 ±4 → ±18V No 150µV -40 °C +125 °C 1.5GΩ 134dB 15MHz 7 mA
RS Stock No. 461-6520
Mfr. Part No.INA118UB
HK$145.14
Each
units
Dual SOIC Surface Mount - 8 ±15V No 50µV -40 °C +125 °C 10GΩ 80dB 800kHz 0.385 mA
RS Stock No. 912-9917
Mfr. Part No.AD8429ARZ
HK$54.973
Each (In a Tube of 98)
units
Dual SOIC Surface Mount - 8 ±4 → ±18V No 150µV -40 °C +125 °C 1.5GΩ 134dB 15MHz 7 mA
RS Stock No. 923-5570
Mfr. Part No.MAX6675ISA+
BrandMaxim
HK$97.899
Each (In a Tube of 100)
units
Single SOIC Surface Mount 3 → 5.5 V 8 - No - -20 °C +85 °C - - - 1.5 mA
RS Stock No. 698-7118
Mfr. Part No.MAX6675ISA+
BrandMaxim
HK$110.71
Each
units
Single SOIC Surface Mount 3 → 5.5 V 8 - No - -20 °C +85 °C - - - 1.5 mA
RS Stock No. 111-2201
Mfr. Part No.AD627ANZ
HK$48.883
Each (In a Tube of 50)
units
Dual, Single PDIP Through Hole 7.5 V 8 ±15V Rail to Rail Output 0.25mV -40 °C +85 °C 20GΩ 77dB - 0.085 mA
RS Stock No. 518-069
Mfr. Part No.EL8170FSZ
BrandIntersil
HK$21.554
Each (In a Pack of 5)
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. 523-8581
Mfr. Part No.AD627ANZ
HK$64.82
Each
units
Dual, Single PDIP Through Hole 7.5 V 8 ±15V Rail to Rail Output 0.25mV -40 °C +85 °C 20GΩ 77dB - 0.085 mA
RS Stock No. 369-6705
Mfr. Part No.INA126PA
HK$19.851
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 No 0.5mV -40 °C +85 °C 1GΩ 74dB - 0.2 mA
RS Stock No. 177-7115
Mfr. Part No.EL8170FSZ
BrandIntersil
HK$25.585
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. 252-1616
Mfr. Part No.INA126PA
HK$25.73
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 0.5mV -40 °C +85 °C 1GΩ 74dB - 0.2 mA
RS Stock No. 923-2379
Mfr. Part No.INA131AP
HK$70.809
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
RS Stock No. 106-6379
Mfr. Part No.AD595AQ
HK$130.464
Each (In a Tube of 25)
units
Dual, Single CDIP Through Hole 5 V 14 ±15V - - -55 °C +125 °C - - 15kHz -
RS Stock No. 523-6248
Mfr. Part No.AD623ARMZ
HK$37.34
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. 288-929
Mfr. Part No.PGA205AU
HK$137.55
Each
units
Dual SOIC Surface Mount - 16 ±15V No - -40 °C +85 °C 10GΩ 75dB - 7.5 mA
RS Stock No. 522-9717
Mfr. Part No.AD620ANZ
HK$95.45
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. 912-9999
Mfr. Part No.AD8421BRMZ
HK$69.429
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. 913-0009
Mfr. Part No.AD8421BRZ
HK$67.242
Each (In a Tube of 98)
units
Dual, Single SOIC 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. 796-8877
Mfr. Part No.AD8421BRZ
HK$92.88
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
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