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. 369-6705
Mfr. Part No.INA126PA
$4.869
Each (In a Tube of 50)
units
Dual PDIP Through Hole 12 V, 15 V, 18 V, 24 V, 28 V, 3 V, 5 V, 9 V 8 ±15V No 0.5mV -40 °C +85 °C 1GΩ 74dB - 0.2 mA
RS Stock No. 252-1616
Mfr. Part No.INA126PA
$4.48
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 0.5mV -40 °C +85 °C 1GΩ 74dB - 0.2 mA
RS Stock No. 923-3546
Mfr. Part No.INA126P
$6.275
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
RS Stock No. 660-5254
Mfr. Part No.INA126P
$6.96
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
RS Stock No. 704-4032
Mfr. Part No.INA333AIDGKT
$7.62
Each
units
Dual, Single MSOP Surface Mount 1.8 5.5 V 8 ±0.9 ±2.75V Rail to Rail Output 0.025mV -40 °C +150 °C 100GΩ 80dB 150kHz 0.075 mA
RS Stock No. 923-6683
Mfr. Part No.INA333AIDGKT
$5.09
Each (On a Reel of 250)
units
Dual, Single MSOP Surface Mount 1.8 5.5 V 8 ±0.9 ±2.75V Rail to Rail Output 0.025mV -40 °C +150 °C 100GΩ 80dB 150kHz 0.075 mA
RS Stock No. 660-4251
Mfr. Part No.INA217AIP
$11.29
Each
units
Dual PDIP Through Hole - 8 ±15V No 250µV -40 °C +125 °C 0.06GΩ 70dB 3.4MHz -
RS Stock No. 102-5656
Mfr. Part No.INA217AIP
$9.137
Each (In a Tube of 50)
units
Dual PDIP Through Hole - 8 ±15V - 250µV -40 °C +125 °C 0.06GΩ 70dB 3.4MHz -
RS Stock No. 100-0771
Mfr. Part No.INA128U
$15.29
Each (In a Tube of 75)
units
Dual SOIC Surface Mount - 8 ±15V - 50µV -40 °C +85 °C 100GΩ 80dB 1.3MHz -
RS Stock No. 121-9391
Mfr. Part No.INA333AIDRGT
$4.86
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. 121-9394
Mfr. Part No.INA826AIDGK
$4.04
Each (In a Tube of 80)
units
Dual, Single VSSOP Surface Mount 2.7 to 36 V 8 ±1.35 to ±18V Rail to Rail Output 150µV -40 °C +125 °C - 80dB 1MHz 200 μA
RS Stock No. 121-8507
Mfr. Part No.INA125PA
$6.736
Each (In a Tube of 25)
units
- - - - - - - - - - - - - -
RS Stock No. 252-1593
Mfr. Part No.INA125PA
$9.83
Each
units
Dual, Single PDIP Through Hole 5 V 16 ±15V No 0.5mV -55 °C +125 °C 100GΩ 72dB - -
RS Stock No. 813-6567
Mfr. Part No.INA826AIDGK
$4.99
Each (In a Pack of 5)
units
Dual, Single VSSOP 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. 813-6554
Mfr. Part No.INA333AIDRGT
$5.63
Each
units
Dual, Single SON Surface Mount 1.8 5.5 V 8 ±0.9 ±2.75V Rail to Rail Output ±25µV -40 °C +125 °C - 80dB 150kHz -
RS Stock No. 923-3530
Mfr. Part No.INA122P
$10.155
Each (In a Tube of 50)
units
Dual, Single PDIP Through Hole 5 V 8 ±12 V, ±15 V, ±3 V, ±5 V, ±9 V Rail to Rail Output 0.25mV -40 °C +85 °C 10GΩ 83dB - 0.085 mA
RS Stock No. 100-0759
Mfr. Part No.INA128PA
$11.131
Each (In a Tube of 50)
units
Dual PDIP Through Hole - 8 ±15V - 125µV -40 °C +85 °C 100GΩ 73dB 1.3MHz -
RS Stock No. 285-8249
Mfr. Part No.INA122UA
$9.76
Each
units
Dual, Single SOIC Surface Mount 5 V 8 ±12 V, ±15 V, ±3 V, ±5 V, ±9 V Rail to Rail Output 0.5mV -40 °C +85 °C 10GΩ 76dB - 0.085 mA
RS Stock No. 100-3802
Mfr. Part No.INA122UA
$9.01
Each (In a Tube of 75)
units
Dual, Single SOIC Surface Mount 5 V 8 ±12 V, ±15 V, ±3 V, ±5 V, ±9 V Rail to Rail Output 0.5mV -40 °C +85 °C 10GΩ 76dB - 0.085 mA
RS Stock No. 660-5226
Mfr. Part No.INA122P
$12.88
Each
units
Dual, Single PDIP Through Hole 5 V 8 ±12 V, ±15 V, ±3 V, ±5 V, ±9 V Rail to Rail Output 0.25mV -40 °C +85 °C 10GΩ 83dB - 0.085 mA