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.
Instrumentation Amplifiers
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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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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RS Stock No.
111-2200
Mfr. Part No.AD623ANZ
BrandAnalog Devices
|
SGD7.92
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.
523-8575
Mfr. Part No.AD623ANZ
BrandAnalog Devices
|
SGD9.34
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.
311-552
Mfr. Part No.PGA204AP
BrandTexas Instruments
|
SGD25.91
Each
units
|
Dual | PDIP | Through Hole | - | 16 | ±15V | No | 125µV | -40 °C | +85 °C | 10GΩ | 75dB | 1MHz | 7.5 mA |
|
RS Stock No.
106-6379
Mfr. Part No.AD595AQ
BrandAnalog Devices
|
SGD28.48
Each (In a Tube of 25)
units
|
Dual, Single | CDIP | Through Hole | 5 V | 14 | ±15V | - | - | -55 °C | +125 °C | - | - | 15kHz | - |
|
|
RS Stock No.
301-779
Mfr. Part No.AD595AQ
BrandAnalog Devices
|
SGD32.34
Each
units
|
Dual, Single | CDIP | Through Hole | 5 V | 14 | ±15V | No | - | -55 °C | +125 °C | - | - | 15kHz | - |
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|
RS Stock No.
923-2372
Mfr. Part No.PGA204AP
BrandTexas Instruments
|
SGD22.82
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.
806-5522
Mfr. Part No.AD623ARZ
BrandAnalog Devices
|
SGD5.84
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.
912-8135
Mfr. Part No.AD623ARZ
BrandAnalog Devices
|
SGD5.68
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.
412-462
Mfr. Part No.AD627ARZ
BrandAnalog Devices
|
SGD10.37
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.
177-7115
Mfr. Part No.EL8170FSZ
BrandIntersil
|
SGD3.60
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.
518-069
Mfr. Part No.EL8170FSZ
BrandIntersil
|
SGD4.23
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 |
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RS Stock No.
252-1593
Mfr. Part No.INA125PA
BrandTexas Instruments
|
SGD9.45
Each
units
|
Dual, Single | PDIP | Through Hole | 5 V | 16 | ±15V | No | 0.5mV | -55 °C | +125 °C | 100GΩ | 72dB | - | - |
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RS Stock No.
923-3546
Mfr. Part No.INA126P
BrandTexas Instruments
|
SGD4.93
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 | - | 0.25mV | -40 °C | +85 °C | 1GΩ | 83dB | - | 0.2 mA |
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RS Stock No.
660-6613
Mfr. Part No.PGA202KP
BrandTexas Instruments
|
SGD25.80
Each
units
|
Dual | PDIP | Through Hole | - | 14 | ±15V | No | 2mV | 0 °C | +70 °C | 10GΩ | 80dB | - | - |
|
|
RS Stock No.
923-3662
Mfr. Part No.PGA202KP
BrandTexas Instruments
|
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.
111-1152
Mfr. Part No.AD623ARMZ
BrandAnalog Devices
|
SGD5.52
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.
786-3142
Mfr. Part No.AD8422BRZ
BrandAnalog Devices
|
SGD14.22
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.
523-6248
Mfr. Part No.AD623ARMZ
BrandAnalog Devices
|
SGD5.84
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.
121-8507
Mfr. Part No.INA125PA
BrandTexas Instruments
|
SGD8.05
Each (In a Tube of 25)
units
|
- | - | - | - | - | - | - | - | - | - | - | - | - | - |
|
|
RS Stock No.
660-5254
Mfr. Part No.INA126P
BrandTexas Instruments
|
SGD5.24
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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