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. 829-0551
Mfr. Part No.MCP6N16-010E/MS
BrandMicrochip
HK$17.664
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. 660-4239
Mfr. Part No.INA118PB
HK$152.21
Each
units
Dual PDIP Through Hole - 8 ±15V No - -40 °C +125 °C 10GΩ 80dB - 0.385 mA
RS Stock No. 197-7157
Mfr. Part No.INA126UA
HK$29.012
Each (In a Pack of 5)
units
Dual SOIC Surface Mount ±15 V 8 - - 250µV - - - - - -
RS Stock No. 709-5083
Mfr. Part No.AD8251ARMZ
HK$68.65
Each
units
Dual MSOP Surface Mount - 10 ±12 V, ±9 V No - -40 °C +85 °C - 80dB - -
RS Stock No. 759-2537
Mfr. Part No.AD8220WARMZ
HK$64.34
Each
units
Dual, Single MSOP Surface Mount 4.5 36 V 8 ±2.25 ±18V Rail to Rail Output 0.3mV -40 °C +125 °C 10^4GΩ 72dB 1.5MHz 750 mA
RS Stock No. 697-7237
Mfr. Part No.AD8221ARZ
HK$55.53
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. 779-9035
Mfr. Part No.LT1101SW#PBF
HK$117.65
Each
units
Dual, Single SOIC Surface Mount 5 V 16 ±15V - 800µV 0 °C +70 °C 12GΩ 96dB 33kHz 105 μA
RS Stock No. 162-5017
Mfr. Part No.INA110KU
HK$144.438
Each (In a Tube of 40)
units
Dual SOIC Surface Mount - 16 ±15V No - -25 °C +85 °C 5000GΩ 106dB - 4.5 mA
RS Stock No. 779-9110
Mfr. Part No.LT1167CS8#PBF
HK$69.35
Each
units
Dual SOIC Surface Mount - 8 ±2.3 → ±18V - 60µV 0 °C +70 °C 1000GΩ 120dB 1MHz 1.3 mA
RS Stock No. 761-6028
Mfr. Part No.LM6144BIM/NOPB
HK$85.31
Each
units
Single SOIC Surface Mount 1.8 to 24 V 14 - - 1mV -40 °C +85 °C 126MΩ 107dB 18MHz -
RS Stock No. 709-5409
Mfr. Part No.AD524CDZ
HK$626.83
Each
units
Dual CDIP Through Hole - 16 ±15V No 0.05mV -40 °C +85 °C 1GΩ 80dB 25MHz -
RS Stock No. 923-3521
Mfr. Part No.INA111BP
HK$158.628
Each (In a Tube of 50)
units
Dual PDIP Through Hole - 8 ±15V - - -40 °C +85 °C 10000GΩ 80dB - 4.5 mA
RS Stock No. 522-9313
Mfr. Part No.AD624ADZ
HK$442.27
Each
units
Dual CDIP Through Hole - 16 ±15V No 0.2mV -25 °C +85 °C 1GΩ 75dB 25MHz -
RS Stock No. 660-5285
Mfr. Part No.INA131BP
HK$116.16
Each
units
Dual, Single PDIP Through Hole 5 V, 9 V, 12 V, 15 V, 18 V, 24 V, 28 V 8 ±15V No 0.05mV -40 °C +85 °C 10GΩ 110dB - 3 mA
RS Stock No. 755-9552
Mfr. Part No.MCP6N11-010E/SN
BrandMicrochip
HK$11.895
Each (In a Pack of 2)
units
Single SOIC Surface Mount 1.8 5.5 V 8 - Rail to Rail Input/Output 0.35V -40 °C +125 °C - 81dB 5MHz 0.8 mA
RS Stock No. 660-5604
Mfr. Part No.PGA204BU
HK$176.27
Each
units
Dual SOIC Surface Mount - 16 ±15V No 50µV -40 °C +85 °C 10GΩ 80dB - 6.5 mA
RS Stock No. 923-3546
Mfr. Part No.INA126P
HK$34.966
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. 709-5761
Mfr. Part No.AD524ADZ
HK$398.64
Each
units
Dual SBCDIP Through Hole - 16 ±15V No 0.25mV -40 °C +85 °C 1GΩ 70dB 25MHz -
RS Stock No. 661-2381
Mfr. Part No.INA126E/250
HK$38.25
Each
units
Dual MSOP Surface Mount 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. 660-5389
Mfr. Part No.INA2141U
HK$161.13
Each
units
Dual SOIC Surface Mount - 16 ±15V No 0.1mV -40 °C +85 °C 10GΩ 97dB - 1.6 mA
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