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. 912-6224
Mfr. Part No.AD8220ARMZ
PHP254.10
Each (In a Tube of 50)
units
Dual, Single MSOP Surface Mount 4.5 → 36 V 8 ±2.25 → ±18V Rail to Rail Output 0.3mV -40 °C +85 °C - 74dB 1.5MHz -
RS Stock No. 102-5672
Mfr. Part No.PGA204BP
PHP897.988
Each (In a Tube of 25)
units
Dual PDIP Through Hole - 16 ±15V - - -40 °C +85 °C 10GΩ 80dB - 7.5 mA
RS Stock No. 660-5279
Mfr. Part No.INA129P
PHP416.07
Each
units
Dual PDIP Through Hole - 8 ±15V No - -40 °C +85 °C 100GΩ 80dB - -
RS Stock No. 100-0741
Mfr. Part No.INA101HP
PHP848.734
Each (In a Tube of 25)
units
Dual PDIP Through Hole - 14 ±15V - 250µV 0 °C +70 °C 10GΩ - 300kHz -
RS Stock No. 545-5405
Mfr. Part No.LTC1043CSW#PBF
PHP312.23
Each
units
- SOIC W Surface Mount - 18 - - - -40 °C +85 °C - - - -
RS Stock No. 106-6380
Mfr. Part No.AD524AD
PHP1,917.597
Each (In a Tube of 23)
units
Dual SBCDIP Through Hole - 16 ±15V - 0.25mV -40 °C +85 °C 1GΩ 70dB 25MHz -
RS Stock No. 169-8737
Mfr. Part No.AD595CQ
PHP1,400.58
Each
units
Dual, Single CDIP Through Hole 5 V 14 ±15V No - -55 °C +125 °C - - 15kHz -
RS Stock No. 923-2372
Mfr. Part No.PGA204AP
PHP759.418
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. 111-1133
Mfr. Part No.AD621ANZ
PHP469.238
Each (In a Tube of 50)
units
Dual PDIP Through Hole - 8 ±12 V, ±15 V, ±3 V, ±5 V, ±9 V - 0.25mV -40 °C +85 °C 10GΩ 93dB - -
RS Stock No. 121-6694
Mfr. Part No.AD8495ARMZ
PHP242.55
Each (In a Tube of 50)
units
- - - - - - - - - - - - - -
RS Stock No. 113-0792
Mfr. Part No.AD594AQ
PHP939.42
Each
units
Dual, Single CDIP Through Hole 5 V 14 ±15V No - -55 °C +125 °C - - 15kHz -
RS Stock No. 759-0878
Mfr. Part No.AD625CDZ
PHP3,885.77
Each
units
Dual CDIP Through Hole - 16 ±6 → ±18V No 0.025mV -40 °C +85 °C 1GΩ 80dB 650kHz 5 mA
RS Stock No. 661-2476
Mfr. Part No.INA129PA
PHP390.98
Each
units
Dual PDIP Through Hole - 8 ±15V No - -40 °C +85 °C 100GΩ 73dB - -
RS Stock No. 697-7237
Mfr. Part No.AD8221ARZ
PHP313.43
Each
units
Dual SOIC Surface Mount - 8 ±12 V, ±15 V, ±3 V, ±5 V, ±9 V No 0.06mV -40 °C +125 °C 100GΩ 130dB 825kHz 1 mA
RS Stock No. 523-6248
Mfr. Part No.AD623ARMZ
PHP200.73
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. 158-0523
Mfr. Part No.AD8295ACPZ-WP
PHP315.099
Each (In a Tray of 64)
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. 660-5395
Mfr. Part No.INA2141UA
PHP681.98
Each
units
Dual SOIC Surface Mount - 16 ±15V No 0.25mV -40 °C +85 °C 10GΩ 93dB - 1.6 mA
RS Stock No. 923-3593
Mfr. Part No.PGA204BU
PHP855.554
Each (In a Tube of 40)
units
Dual SOIC Surface Mount - 16 ±15V - 50µV -40 °C +85 °C 10GΩ 80dB 1MHz 6.5 mA
RS Stock No. 636-227
Mfr. Part No.INA101HP
PHP989.03
Each
units
Dual PDIP Through Hole - 14 ±15V No 250µV 0 °C +70 °C 10GΩ - 300kHz -
RS Stock No. 806-7994
Mfr. Part No.AD8426ACPZ-WP
PHP256.21
Each
units
Dual, Single LFCSP Surface Mount 2.2 → 36 V 16 ±1.35 → ±18V Rail to Rail Output 200µV -40 °C +125 °C 100kΩ 105dB 1MHz 600 (Quiescent) μA
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