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. 923-3533
Mfr. Part No.INA125P
SGD6.976
Each (In a Tube of 25)
units
Dual, Single PDIP Through Hole 5 V 16 ±15V - 0.25mV -55 °C +125 °C 100GΩ 78dB - -
RS Stock No. 923-3546
Mfr. Part No.INA126P
SGD4.252
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. 912-9949
Mfr. Part No.AD8422BRZ
SGD10.159
Each (In a Tube of 98)
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
SGD5.57
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. 923-3662
Mfr. Part No.PGA202KP
SGD21.582
Each (In a Tube of 25)
units
Dual PDIP Through Hole - 14 ±15V - 2mV 0 °C +70 °C 10GΩ 80dB 1MHz -
RS Stock No. 660-5254
Mfr. Part No.INA126P
SGD5.19
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. 660-5232
Mfr. Part No.INA125P
SGD12.63
Each
units
Dual, Single PDIP Through Hole 5 V 16 ±15V No 0.25mV -55 °C +125 °C 100GΩ 78dB - -
RS Stock No. 111-1152
Mfr. Part No.AD623ARMZ
SGD4.70
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. 796-8871
Mfr. Part No.AD8428ARZ
SGD20.18
Each
units
Dual SOIC Surface Mount - 8 ±4 → ±18V Rail to Rail Input 100µV -40 °C +85 °C 4kΩ 140dB 3.5MHz 6.8 mA
RS Stock No. 523-8200
Mfr. Part No.AD622ANZ
SGD11.44
Each
units
Dual PDIP Through Hole - 8 ±12 V, ±15 V, ±3 V, ±5 V, ±9 V No 0.125mV -40 °C +85 °C 0.00002GΩ 103dB 1MHz 1.3 mA
RS Stock No. 165-9491
Mfr. Part No.MAX31855KASA+
BrandMaxim
SGD12.123
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. 111-1132
Mfr. Part No.AD620ANZ
SGD10.071
Each (In a Tube of 50)
units
Dual PDIP Through Hole - 8 ±12 V, ±15 V, ±3 V, ±5 V, ±9 V - 0.125mV -40 °C +85 °C 10GΩ 73dB 1MHz -
RS Stock No. 912-9841
Mfr. Part No.AD8497ARMZ
SGD7.083
Each (In a Tube of 50)
units
Dual, Single MSOP Surface Mount 2.7 → 36 V 8 ±2.7 → ±18V Rail to Rail Output - -40 °C +125 °C - - 25kHz 0.25 mA
RS Stock No. 302-463
Mfr. Part No.AD524AD
SGD60.33
Each
units
Dual SBCDIP Through Hole - 16 ±15V No 0.25mV -40 °C +85 °C 1GΩ 70dB 25MHz -
RS Stock No. 799-2959
Mfr. Part No.MAX4460ESA+
BrandMaxim
SGD4.84
Each (In a Pack of 2)
units
Single SOIC Surface Mount 2.85 → 5.25 V 8 - Rail to Rail Output ±425µV -40 °C +85 °C 2GΩ 120dB 2.5MHz 1.1 mA
RS Stock No. 522-9717
Mfr. Part No.AD620ANZ
SGD17.51
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. 412-327
Mfr. Part No.AD620BNZ
SGD22.04
Each
units
Dual PDIP Through Hole - 8 ±12 V, ±15 V, ±3 V, ±5 V, ±9 V No 50µV -40 °C +85 °C 10GΩ 80dB 120kHz -
RS Stock No. 704-4032
Mfr. Part No.INA333AIDGKT
SGD8.04
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. 761-8936
Mfr. Part No.LTC1100CSW#PBF
SGD16.93
Each
units
Single SOIC W Surface Mount 5 V 16 - Rail to Rail Output ±0.01mV -40 °C +85 °C - 90dB 180kHz 4.5 mA
RS Stock No. 165-9528
Mfr. Part No.MAX4460ESA+
BrandMaxim
SGD5.097
Each (In a Tube of 100)
units
Single SOIC Surface Mount 2.85 → 5.25 V 8 - Rail to Rail Output ±425µV -40 °C +85 °C 2GΩ 120dB 2.5MHz 1.1 mA
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