Instrumentation Amplifiers

Instrumentation amplifiers (sometimes shortened to In-Amps) are a type of precision gain block used in electronic and measurement test equipment. Instrumentation amplifiers act as a differential amplifier; a type of electronic amplifier that amplifies the voltage difference between two inputs but suppresses any voltage signals that are common to the two inputs. RS Components offer a range of instrumentation amplifiers from several trusted brands in the industry, including Analog Devices, Microchip, Texas Instruments, and more.

How do instrumentation amplifiers work?

Instrumentation amplifiers are almost always composed of 3 op-amps (operational amplifiers) and several resistors. They provide the most important function of CMR (common-mode rejection) by cancelling out any signals that have the same potential as received by both of the inputs. Any signals that have different potentials get amplified. They are used for low frequency signals (such as <1MHz), which they amplify whilst also cutting out any common-mode noise that may be present in the input signal.

What are the instrumentation amplifiers used for?

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. 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.

Typical applications

  • Test & Measurement Industrial Devices
  • Data Acquisition Devices
  • Medical Devices

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Omschrijving Prijs 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-stocknr. 165-9306
FabrikantnummerMAX4194ESA+
FabrikantMaxim Integrated
2,295 €
Each (In a Tube of 100)
Aantal stuks
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-stocknr. 783-3891
FabrikantnummerMAX31855RASA+
FabrikantMaxim Integrated
5,64 €
Each
Aantal stuks
Single SOIC Surface Mount 3.3 V 8 - No - -50 °C +1770 °C - - - 1500 μA
RS-stocknr. 190-1281
FabrikantnummerMAX6675ISA+
FabrikantMaxim Integrated
11,81 €
Each
Aantal stuks
Single SOIC Surface Mount 3 → 5.5 V 8 - No - -20 °C +85 °C - - - 1.5 mA
RS-stocknr. 192-3172
FabrikantnummerMAX31855RASA+
FabrikantMaxim Integrated
5,25 €
Each (In a Pack of 2)
Aantal stuks
Single SOIC Surface Mount 3.3 V 8 - - - -50 °C +1770 °C - - - 1500 μA
RS-stocknr. 189-7761
FabrikantnummerMAX6675ISA+
FabrikantMaxim Integrated
7,548 €
Each (In a Tube of 100)
Aantal stuks
Single SOIC Surface Mount 3 → 5.5 V 8 - No - -20 °C +85 °C - - - 1.5 mA
RS-stocknr. 189-7288
FabrikantnummerMAX4208AUA+
FabrikantMaxim Integrated
2,208 €
Each (In a Tube of 50)
Aantal stuks
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
RS-stocknr. 189-8812
FabrikantnummerMAX4194ESA+
FabrikantMaxim Integrated
3,338 €
Each (In a Pack of 5)
Aantal stuks
Dual, Single SOIC Surface Mount 2.7 → 7.5 V 8 ±1.35 to ±3.75V Rail to Rail Output 0.69mV -40 °C +85 °C 1GΩ 60dB 250kHz 0.00002 mA
RS-stocknr. 189-7286
FabrikantnummerMAX4194ESA+
FabrikantMaxim Integrated
2,448 €
Each (In a Tube of 100)
Aantal stuks
Dual, Single SOIC Surface Mount 2.7 → 7.5 V 8 ±1.35 to ±3.75V Rail to Rail Output 0.69mV -40 °C +85 °C 1GΩ 60dB 250kHz 0.00002 mA
RS-stocknr. 165-9393
FabrikantnummerMAX31855RASA+
FabrikantMaxim Integrated
4,827 €
Each (In a Tube of 10)
Aantal stuks
Single SOIC Surface Mount 3.3 V 8 - No - -50 °C +1770 °C - - - 1500 μA
RS-stocknr. 190-1414
FabrikantnummerMAX31855KASA+
FabrikantMaxim Integrated
6,205 €
Each (In a Pack of 2)
Aantal stuks
Single SOIC Surface Mount 3.3 V 8 - No - -200 °C +1350 °C - - - 1500 μA
RS-stocknr. 190-1258
FabrikantnummerMAX31855JASA+
FabrikantMaxim Integrated
6,205 €
Each (In a Pack of 2)
Aantal stuks
Single SOIC Surface Mount 3.3 V 8 - No - -40 °C +750 °C - - - 1500 μA
RS-stocknr. 783-3882
FabrikantnummerMAX31855NASA+
FabrikantMaxim Integrated
5,35 €
Each
Aantal stuks
Single SOIC Surface Mount 3.3 V 8 - No - -200 °C +1300 °C - - - 1500 μA
RS-stocknr. 189-7745
FabrikantnummerMAX31855KASA+
FabrikantMaxim Integrated
4,085 €
Each (In a Tube of 100)
Aantal stuks
Single SOIC Surface Mount 3.3 V 8 - No - -200 °C +1350 °C - - - 1500 μA
RS-stocknr. 146-1066
FabrikantnummerMAX31855NASA+
FabrikantMaxim Integrated
4,827 €
Each (In a Tube of 10)
Aantal stuks
Single SOIC Surface Mount 3.3 V 8 - No - -200 °C +1300 °C - - - 1500 μA
RS-stocknr. 189-7744
FabrikantnummerMAX31855JASA+
FabrikantMaxim Integrated
4,029 €
Each (In a Tube of 100)
Aantal stuks
Single SOIC Surface Mount 3.3 V 8 - No - -40 °C +750 °C - - - 1500 μA
RS-stocknr. 732-8406
FabrikantnummerMAX4208AUA+
FabrikantMaxim Integrated
2,18 €
Each
Aantal stuks
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-stocknr. 189-8832
FabrikantnummerMAX4208AUA+
FabrikantMaxim Integrated
2,194 €
Each (In a Pack of 5)
Aantal stuks
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