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. 523-8575
Mfr. Part No.AD623ANZ
SGD9.22
Each
units
Dual, Single PDIP Through Hole 3 V, 5 V, 9 V 8 ±3 V, ±5 V Rail to Rail Output 0.2mV -40 °C +85 °C 2GΩ 70dB - -
RS Stock No. 111-2200
Mfr. Part No.AD623ANZ
SGD6.93
Each (In a Tube of 50)
units
Dual, Single PDIP Through Hole 3 V, 5 V, 9 V 8 ±3 V, ±5 V Rail to Rail Output 0.2mV -40 °C +85 °C 2GΩ 70dB - -
RS Stock No. 301-779
Mfr. Part No.AD595AQ
SGD32.68
Each
units
Dual, Single CDIP Through Hole 5 V 14 ±15V No - -55 °C +125 °C - - 15kHz -
RS Stock No. 806-5522
Mfr. Part No.AD623ARZ
SGD6.50
Each (In a Pack of 2)
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. 106-6379
Mfr. Part No.AD595AQ
SGD28.789
Each (In a Tube of 25)
units
Dual, Single CDIP Through Hole 5 V 14 ±15V - - -55 °C +125 °C - - 15kHz -
RS Stock No. 923-2372
Mfr. Part No.PGA204AP
SGD23.31
Each (In a Tube of 25)
units
Dual PDIP Through Hole - 16 ±15V - 125µV -40 °C +85 °C 10GΩ 75dB 1MHz 7.5 mA
RS Stock No. 311-552
Mfr. Part No.PGA204AP
SGD26.75
Each
units
Dual PDIP Through Hole - 16 ±15V No 125µV -40 °C +85 °C 10GΩ 75dB 1MHz 7.5 mA
RS Stock No. 912-8135
Mfr. Part No.AD623ARZ
SGD4.99
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. 113-0792
Mfr. Part No.AD594AQ
SGD35.40
Each
units
Dual, Single CDIP Through Hole 5 V 14 ±15V No - -55 °C +125 °C - - 15kHz -
RS Stock No. 106-7012
Mfr. Part No.AD594AQ
SGD31.18
Each (In a Tube of 25)
units
Dual, Single CDIP Through Hole 5 V 14 ±15V - - -55 °C +125 °C - - 15kHz -
RS Stock No. 912-7167
Mfr. Part No.AD627ARZ
SGD9.047
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. 412-462
Mfr. Part No.AD627ARZ
SGD10.50
Each
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. 518-069
Mfr. Part No.EL8170FSZ
BrandIntersil
SGD4.31
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. 177-7115
Mfr. Part No.EL8170FSZ
BrandIntersil
SGD3.66
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. 523-6248
Mfr. Part No.AD623ARMZ
SGD6.50
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. 786-3142
Mfr. Part No.AD8422BRZ
SGD13.71
Each
units
Dual SOIC Surface Mount - 8 ±1.8 ±18V Rail to Rail Output 75µV -40 °C +85 °C - 150dB 2.2MHz 30 μA
RS Stock No. 923-3662
Mfr. Part No.PGA202KP
SGD24.55
Each (In a Tube of 25)
units
Dual PDIP Through Hole - 14 ±15V - 2mV 0 °C +70 °C 10GΩ 80dB 1MHz -
RS Stock No. 252-1593
Mfr. Part No.INA125PA
SGD9.50
Each
units
Dual, Single PDIP Through Hole 5 V 16 ±15V No 0.5mV -55 °C +125 °C 100GΩ 72dB - -
RS Stock No. 111-1152
Mfr. Part No.AD623ARMZ
SGD4.99
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. 660-5254
Mfr. Part No.INA126P
SGD6.00
Each
units
Dual PDIP Through Hole 12 V, 15 V, 18 V, 24 V, 28 V, 3 V, 5 V, 9 V 8 ±15V No 0.25mV -40 °C +85 °C 1GΩ 83dB - 0.2 mA
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