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. 914-0469
Mfr. Part No.AD8226ARZ-R7
SGD2.557
Each (On a Reel of 1000)
units
Dual, Single SOIC Surface Mount 2.2 → 36 V 8 ±1.35 → ±18V Rail to Rail Output 100µV -40 °C +125 °C - 80 dB @ 5 kHz, 86 dB @ 60 kHz 1.5MHz 600 μA
RS Stock No. 828-684
Mfr. Part No.INA103KP
SGD19.29
Each
units
Dual PDIP Through Hole - 16 ±15V No 30µV -40 °C +85 °C 0.06GΩ 100dB 6MHz -
RS Stock No. 912-9917
Mfr. Part No.AD8429ARZ
SGD9.287
Each (In a Tube of 98)
units
Dual SOIC Surface Mount - 8 ±4 → ±18V No 150µV -40 °C +125 °C 1.5GΩ 134dB 15MHz 7 mA
RS Stock No. 538-8406
Mfr. Part No.AD524ARZ-16
SGD29.92
Each
units
Dual SOIC W Surface Mount - 16 ±15V No 0.25mV -40 °C +85 °C 1GΩ 70dB 25MHz -
RS Stock No. 145-6948
Mfr. Part No.INA129PA
SGD8.701
Each (In a Tube of 50)
units
Dual PDIP Through Hole - 8 ±15V No - -40 °C +85 °C 100GΩ 73dB - -
RS Stock No. 764-8747
Mfr. Part No.AD8429ARZ
SGD10.04
Each
units
Dual SOIC Surface Mount - 8 ±4 → ±18V No 150µV -40 °C +125 °C 1.5GΩ 134dB 15MHz 7 mA
RS Stock No. 829-0560
Mfr. Part No.MCP6N16-100E/MS
BrandMicrochip
SGD2.812
Each (In a Pack of 5)
units
Single MSOP Surface Mount 1.8 → 5.5 V 8 - Rail to Rail Output 17µV -40 °C +125 °C 1kΩ 112dB 35MHz -
RS Stock No. 759-1294
Mfr. Part No.AD8236ARMZ
SGD3.66
Each
units
Single MSOP Surface Mount 1.8 → 5.5 V 8 - Rail to Rail Output 3.5mV -40 °C +125 °C 440GΩ 86dB 23kHz 0.05 mA
RS Stock No. 545-4957
Mfr. Part No.LTC1100CN8#PBF
SGD16.80
Each
units
Dual, Single PDIP Through Hole 9 V, 12 V, 15 V 8 ±3 V, ±5 V No 0.01mV 0 °C +70 °C - 90dB - 3.3 mA
RS Stock No. 697-7265
Mfr. Part No.AD8295ACPZ-WP
SGD7.97
Each
units
Dual LFCSP Surface Mount - 16 ±12 V, ±15 V, ±3 V, ±5 V, ±9 V No 0.12mV -40 °C +85 °C 100GΩ 80dB - -
RS Stock No. 523-6412
Mfr. Part No.AD8221ARMZ
SGD6.30
Each
units
Dual, Single LFCSP Surface Mount 3 V, 5 V, 9 V 8 ±3 V, ±5 V Rail to Rail Output 2.7mV -40 °C +125 °C 0.8MΩ 62dB - -
RS Stock No. 100-0759
Mfr. Part No.INA128PA
SGD9.505
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. 912-6621
Mfr. Part No.AD8251ARMZ
SGD13.342
Each (In a Tube of 50)
units
Dual MSOP Surface Mount - 10 ±12 V, ±9 V No - -40 °C +85 °C - 80dB - -
RS Stock No. 660-4254
Mfr. Part No.INA2128U
SGD26.98
Each
units
Dual SOIC Surface Mount - 16 ±15V No - -40 °C +85 °C 100GΩ 80dB - 1.5 mA
RS Stock No. 829-0551
Mfr. Part No.MCP6N16-010E/MS
BrandMicrochip
SGD2.812
Each (In a Pack of 5)
units
Single MSOP Surface Mount 1.8 → 5.5 V 8 - Rail to Rail Output 22µV -40 °C +125 °C 1kΩ 103dB 5MHz -
RS Stock No. 913-0778
Mfr. Part No.AD524ADZ
SGD45.573
Each (In a Tube of 23)
units
Dual SBCDIP Through Hole - 16 ±15V No 0.25mV -40 °C +85 °C 1GΩ 70dB 25MHz -
RS Stock No. 759-0866
Mfr. Part No.AD622ARZ-R7
SGD8.83
Each
units
Dual SOIC Surface Mount - 8 ±2.6 → ±15V No 0.125mV -40 °C +85 °C 10GΩ 66dB 1MHz 1.5 mA
RS Stock No. 168-4168
Mfr. Part No.AD622ARZ-R7
SGD9.84
Each (On a Reel of 750)
units
Dual SOIC Surface Mount - 8 ±2.6 → ±15V No 0.125mV -40 °C +85 °C 10GΩ 66dB 1MHz 1.5 mA
RS Stock No. 709-5761
Mfr. Part No.AD524ADZ
SGD53.25
Each
units
Dual SBCDIP Through Hole - 16 ±15V No 0.25mV -40 °C +85 °C 1GΩ 70dB 25MHz -
RS Stock No. 522-9098
Mfr. Part No.AD625JNZ
SGD32.78
Each
units
Dual PDIP Through Hole - 16 ±12 V, ±15 V, ±9 V No 0.05mV 0 °C +70 °C 1GΩ 70dB 25MHz -
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