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. 165-9491
Mfr. Part No.MAX31855KASA+
BrandMaxim
$9.643
Each (In a Tube of 100)
units
Single SOIC Surface Mount 3.3 V 8 - No - -200 °C +1350 °C - - - 1500 μA
RS Stock No. 786-1017
Mfr. Part No.MAX31855KASA+
BrandMaxim
$7.26
Each
units
Single SOIC Surface Mount 3.3 V 8 - No - -200 °C +1350 °C - - - 1500 μA
RS Stock No. 518-069
Mfr. Part No.EL8170FSZ
BrandIntersil
$3.606
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
$3.56
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. 912-7069
Mfr. Part No.AD597ARZ
$9.617
Each (In a Tube of 98)
units
Single SOIC Surface Mount 5 → 30 V 8 - No - -55 °C +125 °C - - 15kHz -
RS Stock No. 230-646
Mfr. Part No.AD597ARZ
$12.91
Each
units
Single SOIC Surface Mount 5 → 30 V 8 - No - -55 °C +125 °C - - 15kHz -
RS Stock No. 369-6705
Mfr. Part No.INA126PA
$3.817
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. 252-1616
Mfr. Part No.INA126PA
$4.94
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. 923-2360
Mfr. Part No.INA114AP
$13.163
Each (In a Tube of 50)
units
Dual PDIP Through Hole - 8 ±12 V, ±15 V, ±3 V, ±5 V, ±9 V - 125µV -40 °C +85 °C 10GΩ 110dB 1MHz 3 mA
RS Stock No. 111-2200
Mfr. Part No.AD623ANZ
$6.74
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. 153-3424
Mfr. Part No.LTK001CN8#PBF
$12.093
Each (In a Tube of 50)
units
- PDIP Through Hole - 8 - - - 0 °C +70 °C - - - -
RS Stock No. 311-524
Mfr. Part No.INA114AP
$18.74
Each
units
Dual PDIP Through Hole - 8 ±12 V, ±15 V, ±3 V, ±5 V, ±9 V No 125µV -40 °C +85 °C 10GΩ 110dB 1MHz 3 mA
RS Stock No. 523-8575
Mfr. Part No.AD623ANZ
$10.44
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. 545-5770
Mfr. Part No.LTK001CN8#PBF
$15.43
Each
units
- PDIP Through Hole - 8 - - - 0 °C +70 °C - - - -
RS Stock No. 285-8126
Mfr. Part No.INA122PA
$9.88
Each
units
Dual, Single PDIP Through Hole 5 V 8 ±12 V, ±15 V, ±3 V, ±5 V, ±9 V Rail to Rail Output 0.5mV -40 °C +85 °C 10GΩ 76dB - 0.085 mA
RS Stock No. 919-9566
Mfr. Part No.LTC6800HMS8#PBF
$3.723
Each (In a Tube of 50)
units
Single MSOP Surface Mount 5 V 8 - Rail to Rail Input/Output ±0.1mV -40 °C +125 °C - 116dB 200kHz 1.3 mA
RS Stock No. 761-9648
Mfr. Part No.LTC6800HMS8#PBF
$5.61
Each
units
Single MSOP Surface Mount 5 V 8 - Rail to Rail Input/Output ±0.1mV -40 °C +125 °C - 116dB 200kHz 1.3 mA
RS Stock No. 660-5254
Mfr. Part No.INA126P
$5.83
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 0.25mV -40 °C +85 °C 1GΩ 83dB - 0.2 mA
RS Stock No. 923-3546
Mfr. Part No.INA126P
$4.611
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. 917-3504
Mfr. Part No.LT1167ACS8#PBF
$86.866
Each (In a Tube of 100)
units
Dual SOIC Surface Mount - 8 ±12 V, ±15 V, ±3 V, ±5 V, ±9 V - 0.04mV 0 °C +70 °C 1000GΩ 90dB 1MHz 1.3 mA