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. 923-5570
Mfr. Part No.MAX6675ISA+
£6.507
Each (In a Tube of 100)
Units
Single SOIC Surface Mount 3 5.5 V 8 - No - -20 °C +85 °C - - - 1.5 mA
RS Stock No. 698-7118
Mfr. Part No.MAX6675ISA+
£8.62
Each
Units
Single SOIC Surface Mount 3 5.5 V 8 - No - -20 °C +85 °C - - - 1.5 mA
RS Stock No. 783-3891
Mfr. Part No.MAX31855RASA+
£5.33
Each
Units
Single SOIC Surface Mount 3.3 V 8 - No - -50 °C +1770 °C - - - 1500 μA
RS Stock No. 165-9393
Mfr. Part No.MAX31855RASA+
£4.841
Each (In a Tube of 10)
Units
Single SOIC Surface Mount 3.3 V 8 - No - -50 °C +1770 °C - - - 1500 μA
RS Stock No. 783-3882
Mfr. Part No.MAX31855NASA+
£3.16
Each
Units
Single SOIC Surface Mount 3.3 V 8 - No - -200 °C +1300 °C - - - 1500 μA
RS Stock No. 146-1066
Mfr. Part No.MAX31855NASA+
£3.174
Each (In a Tube of 10)
Units
Single SOIC Surface Mount 3.3 V 8 - No - -200 °C +1300 °C - - - 1500 μA
RS Stock No. 146-1281
Mfr. Part No.MAX31855SASA+
£3.861
Each (In a Tube of 10)
Units
Single SOIC Surface Mount 3.3 V 8 - No - +50 °C +1600 °C - - - 1500 μA
RS Stock No. 783-3894
Mfr. Part No.MAX31855SASA+
£4.25
Each
Units
Single SOIC Surface Mount 3.3 V 8 - No - +50 °C +1600 °C - - - 1500 μA
RS Stock No. 732-8406
Mfr. Part No.MAX4208AUA+
£2.05
Each
Units
Dual, Single μMAX Surface Mount 2.85 5.5 V 8 ±1.425 ±2.75V Rail to Rail Output 0.02mV -40 °C +125 °C 2GΩ 106dB 750kHz 3 mA
RS Stock No. 146-1248
Mfr. Part No.MAX4208AUA+
£1.741
Each (In a Tube of 50)
Units
Dual, Single μMAX Surface Mount 2.85 5.5 V 8 ±1.425 ±2.75V Rail to Rail Output 0.02mV -40 °C +125 °C 2GΩ 106dB 750kHz 3 mA
RS Stock No. 732-8396
Mfr. Part No.MAX4194ESA+
£2.57
Each
Units
Dual, Single SOIC Surface Mount 2.7 7.5 V 8 ±1.35 ±3.75V Rail to Rail Output 0.69mV -40 °C +85 °C 1GΩ 60dB 250kHz 0.00002 mA
RS Stock No. 165-9306
Mfr. Part No.MAX4194ESA+
£2.145
Each (In a Tube of 100)
Units
Dual, Single SOIC Surface Mount 2.7 7.5 V 8 ±1.35 ±3.75V Rail to Rail Output 0.69mV -40 °C +85 °C 1GΩ 60dB 250kHz 0.00002 mA
RS Stock No. 799-2959
Mfr. Part No.MAX4460ESA+
£1.675
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. 165-9528
Mfr. Part No.MAX4460ESA+
£1.39
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
New
RS Stock No. 190-1258
Mfr. Part No.MAX31855JASA+
£5.15
Each (In a Pack of 2)
Units
Single SOIC Surface Mount 3.3 V 8 - No - -40 °C +750 °C - - - 1500 μA
New
RS Stock No. 190-1414
Mfr. Part No.MAX31855KASA+
£5.05
Each (In a Pack of 2)
Units
Single SOIC Surface Mount 3.3 V 8 - No - -200 °C +1350 °C - - - 1500 μA
New
RS Stock No. 189-7288
Mfr. Part No.MAX4208AUA+
£1.813
Each (In a Tube of 50)
Units
Dual, Single μMAX Surface Mount 2.85 5.5 V 8 ±1.425 to ±2.75V Rail to Rail Output 0.02mV -40 °C +125 °C 2GΩ 106dB 750kHz 3 mA
New
RS Stock No. 189-8832
Mfr. Part No.MAX4208AUA+
£2.068
Each (In a Pack of 5)
Units
Dual, Single μMAX Surface Mount 2.85 5.5 V 8 ±1.425 to ±2.75V Rail to Rail Output 0.02mV -40 °C +125 °C 2GΩ 106dB 750kHz 3 mA
New
RS Stock No. 189-7745
Mfr. Part No.MAX31855KASA+
£3.989
Each (In a Tube of 100)
Units
Single SOIC Surface Mount 3.3 V 8 - No - -200 °C +1350 °C - - - 1500 μA
New
RS Stock No. 189-7744
Mfr. Part No.MAX31855JASA+
£4.057
Each (In a Tube of 100)
Units
Single SOIC Surface Mount 3.3 V 8 - No - -40 °C +750 °C - - - 1500 μA