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. 523-8575
Mfr. Part No.AD623ANZ
PHP315.00
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. 111-2200
Mfr. Part No.AD623ANZ
PHP236.073
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. 912-7946
Mfr. Part No.AD8253ARMZ
PHP463.58
Each (In a Tube of 50)
units
Dual MSOP Surface Mount - 10 ±12 V, ±9 V No 150µV -40 °C +85 °C 0.00002GΩ 80dB 10MHz -
RS Stock No. 709-7086
Mfr. Part No.AD8253ARMZ
PHP555.27
Each
units
Dual MSOP Surface Mount - 10 ±12 V, ±9 V No 150µV -40 °C +85 °C 0.00002GΩ 80dB 10MHz -
RS Stock No. 759-0027
Mfr. Part No.AD8226ARZ
PHP151.20
Each
units
Dual, Single SOIC Surface Mount 2.2 → 36 V 8 ±1.35 → ±18V Rail to Rail Output 100µV -40 °C +125 °C 100kΩ 80dB 1.5MHz 350 μA
RS Stock No. 912-8135
Mfr. Part No.AD623ARZ
PHP145.655
Each (In a Tube of 98)
units
Dual, Single SOIC Surface Mount 3 → 12 V 8 ±2.5 → ±6V Rail to Rail Output 200µV -40 °C +85 °C - 90dB 800kHz 500 μA
RS Stock No. 806-5522
Mfr. Part No.AD623ARZ
PHP226.28
Each (In a Pack of 2)
units
Dual, Single SOIC Surface Mount 3 → 12 V 8 ±2.5 → ±6V Rail to Rail Output 200µV -40 °C +85 °C - 90dB 800kHz 500 μA
RS Stock No. 759-0099
Mfr. Part No.AD8495CRMZ
PHP512.98
Each
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. 914-0469
Mfr. Part No.AD8226ARZ-R7
PHP97.253
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. 522-9717
Mfr. Part No.AD620ANZ
PHP570.11
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. 111-1132
Mfr. Part No.AD620ANZ
PHP399.831
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. 523-7572
Mfr. Part No.AD620BRZ
PHP681.05
Each
units
Dual SOIC Surface Mount - 8 ±12 V, ±15 V, ±3 V, ±5 V, ±9 V No 0.05mV -40 °C +85 °C 10GΩ 80dB 120kHz -
RS Stock No. 111-1176
Mfr. Part No.AD620BRZ
PHP520.342
Each (In a Tube of 98)
units
Dual SOIC Surface Mount - 8 ±12 V, ±15 V, ±3 V, ±5 V, ±9 V - 0.05mV -40 °C +85 °C 10GΩ 80dB 120kHz -
RS Stock No. 301-779
Mfr. Part No.AD595AQ
PHP938.20
Each
units
Dual, Single CDIP Through Hole 5 V 14 ±15V No - -55 °C +125 °C - - 15kHz -
RS Stock No. 709-6067
Mfr. Part No.AD627BNZ
PHP497.17
Each
units
Dual, Single PDIP Through Hole 7.5 V 8 ±15V Rail to Rail Output 0.15mV -40 °C +85 °C 20GΩ 83dB - 0.085 mA
RS Stock No. 159-7767
Mfr. Part No.AD627BNZ
PHP437.467
Each (In a Tube of 50)
units
Dual, Single PDIP Through Hole 7.5 V 8 ±15V Rail to Rail Output 0.15mV -40 °C +85 °C 20GΩ 83dB - 0.085 mA
RS Stock No. 912-9917
Mfr. Part No.AD8429ARZ
PHP320.309
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. 697-7228
Mfr. Part No.AD8220ARMZ
PHP319.20
Each
units
Dual, Single MSOP Surface Mount 12 V, 15 V, 18 V, 24 V, 28 V, 5 V, 9 V 8 ±12 V, ±15 V, ±3 V, ±5 V, ±9 V Rail to Rail Output 0.3mV -40 °C +85 °C - 74dB 1.5MHz -
RS Stock No. 806-7988
Mfr. Part No.AD8421ARMZ
PHP304.67
Each
units
Dual, Single MSOP Surface Mount 5 → 6 V 8 ±2.5 → ±18V - 60µV -40 °C +85 °C 20kΩ 134dB 10MHz 2.3 mA
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 -