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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Description Prix 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
N° de stock RS 523-8575
Référence fabricantAD623ANZ
5,61 €
Each
Unité
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 - -
N° de stock RS 912-8135
Référence fabricantAD623ARZ
3,212 €
Each (In a Tube of 98)
Unité
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
N° de stock RS 111-2200
Référence fabricantAD623ANZ
4,619 €
Each (In a Tube of 50)
Unité
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 - -
N° de stock RS 806-5522
Référence fabricantAD623ARZ
3,84 €
Each (In a Pack of 2)
Unité
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
N° de stock RS 523-0212
Référence fabricantAD620ARZ
8,06 €
Each
Unité
Dual SOIC Surface Mount - 8 ±12 V, ±15 V, ±3 V, ±5 V, ±9 V No 0.125mV -40 °C +85 °C 10GΩ 73dB 120kHz -
N° de stock RS 761-8497
Référence fabricantLT1920IS8#PBF
6,77 €
Each
Unité
Dual SOIC Surface Mount - 8 ±20V Rail to Rail Output 0.185mV -40 °C +85 °C 200GΩ 75dB 1MHz 1.3 mA
N° de stock RS 923-6683
Référence fabricantINA333AIDGKT
3,229 €
Each (On a Reel of 250)
Unité
Dual, Single MSOP Surface Mount 1.8 5.5 V 8 ±0.9 ±2.75V Rail to Rail Output 0.025mV -40 °C +150 °C 100GΩ 80dB 150kHz 0.075 mA
N° de stock RS 121-9041
Référence fabricantINA131BP
11,523 €
Each (In a Tube of 50)
Unité
Dual, Single PDIP Through Hole 5 V, 9 V, 12 V, 15 V, 18 V, 24 V, 28 V 8 ±15V - 0.05mV -40 °C +85 °C 10GΩ 110dB - 3 mA
N° de stock RS 704-4032
Référence fabricantINA333AIDGKT
5,34 €
Each
Unité
Dual, Single MSOP Surface Mount 1.8 5.5 V 8 ±0.9 ±2.75V Rail to Rail Output 0.025mV -40 °C +150 °C 100GΩ 80dB 150kHz 0.075 mA
N° de stock RS 145-7730
Référence fabricantINA321EA/250
1,533 €
Each (On a Reel of 250)
Unité
Single MSOP Surface Mount 3 V, 5 V 8 - Rail to Rail Output 1mV -55 °C +125 °C 10000GΩ 80dB - -
N° de stock RS 660-5285
Référence fabricantINA131BP
13,07 €
Each
Unité
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
N° de stock RS 461-6592
Référence fabricantINA321EA/250
2,88 €
Each
Unité
Single MSOP Surface Mount 3 V, 5 V 8 - Rail to Rail Output 1mV -55 °C +125 °C 10000GΩ 80dB - -
N° de stock RS 518-069
Référence fabricantEL8170FSZ
MarqueIntersil
1,276 €
Each (In a Pack of 5)
Unité
Single SOIC Surface Mount 3 V, 5 V 8 - Rail to Rail Input/Output 0.2mV -40 °C +125 °C - 90dB - 0.095 mA
N° de stock RS 697-6962
Référence fabricantAD623BRZ
6,45 €
Each
Unité
Dual, Single SOIC Surface Mount 3 V, 5 V, 9 V 8 ±3 V, ±5 V Rail to Rail Output 0.1mV -40 °C +85 °C 2GΩ 77dB - -
N° de stock RS 177-7115
Référence fabricantEL8170FSZ
MarqueIntersil
1,258 €
Each (In a Tube of 97)
Unité
Single SOIC Surface Mount 3 V, 5 V 8 - Rail to Rail Input/Output 0.2mV -40 °C +125 °C - 90dB - 0.095 mA
N° de stock RS 522-9717
Référence fabricantAD620ANZ
10,00 €
Each
Unité
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 -
N° de stock RS 523-8581
Référence fabricantAD627ANZ
7,29 €
Each
Unité
Dual, Single PDIP Through Hole 7.5 V 8 ±15V Rail to Rail Output 0.25mV -40 °C +85 °C 20GΩ 77dB - 0.085 mA
N° de stock RS 709-5761
Référence fabricantAD524ADZ
39,04 €
Each
Unité
Dual SBCDIP Through Hole - 16 ±15V No 0.25mV -40 °C +85 °C 1GΩ 70dB 25MHz -
N° de stock RS 545-4957
Référence fabricantLTC1100CN8#PBF
12,43 €
Each
Unité
Dual, Single PDIP Through Hole 9 V, 12 V, 15 V 8 ±3 V, ±5 V No 0.01mV 0 °C +70 °C - 90dB - 3.3 mA
N° de stock RS 100-0741
Référence fabricantINA101HP
17,356 €
Each (In a Tube of 25)
Unité
Dual PDIP Through Hole - 14 ±15V - 250µV 0 °C +70 °C 10GΩ - 300kHz -