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 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庫存編號 704-4032
製造零件編號INA333AIDGKT
TWD188.00
單位
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
RS庫存編號 923-6683
製造零件編號INA333AIDGKT
TWD117.30
個 (在毎卷:250)
單位
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
RS庫存編號 231-5512
製造零件編號INA118U
TWD624.00
單位
Dual SOIC Surface Mount - 8 ±15V No 125µV -40 °C +125 °C 10GΩ 73dB 800kHz 0.385 mA
RS庫存編號 100-0773
製造零件編號INA118U
TWD386.90
毎管:75 個
單位
Dual SOIC Surface Mount - 8 ±15V - 125µV -40 °C +125 °C 10GΩ 73dB 800kHz 0.385 mA
RS庫存編號 522-9717
製造零件編號AD620ANZ
TWD401.00
單位
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庫存編號 412-327
製造零件編號AD620BNZ
TWD614.00
單位
Dual PDIP Through Hole - 8 ±12 V, ±15 V, ±3 V, ±5 V, ±9 V No 50µV -40 °C +85 °C 10GΩ 80dB 120kHz -
RS庫存編號 759-0080
製造零件編號AD8495ARMZ
TWD226.00
單位
Dual, Single MSOP Surface Mount 2.7 36 V 8 ±2.7 ±18V Rail to Rail Output - -40 °C +125 °C 60kΩ - 25kHz 0.25 mA
RS庫存編號 427-266
製造零件編號AD621ARZ
TWD429.00
單位
Dual SOIC Surface Mount - 8 ±12 V, ±15 V, ±3 V, ±5 V, ±9 V No 0.25mV -40 °C +85 °C 10GΩ 93dB - -
RS庫存編號 523-8581
製造零件編號AD627ANZ
TWD281.00
單位
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
RS庫存編號 806-7994
製造零件編號AD8426ACPZ-WP
TWD207.00
單位
Dual, Single LFCSP Surface Mount 2.2 36 V 16 ±1.35 ±18V Rail to Rail Output 200µV -40 °C +125 °C 100kΩ 105dB 1MHz 600 (Quiescent) μA
RS庫存編號 923-3555
製造零件編號INA2128UA
TWD417.20
毎管:40 個
單位
Dual SOIC Surface Mount - 16 ±15V - 125µV -40 °C +85 °C 100GΩ 73dB 1.3MHz 1.5 mA
RS庫存編號 506-0293
製造零件編號LT1167ACS8#PBF
TWD480.00
單位
Dual SOIC Surface Mount - 8 ±12 V, ±15 V, ±3 V, ±5 V, ±9 V No 0.04mV 0 °C +70 °C 1000GΩ 90dB 1MHz 1.3 mA
RS庫存編號 660-5351
製造零件編號INA2128UA
TWD473.00
單位
Dual SOIC Surface Mount - 16 ±15V No 125µV -40 °C +85 °C 100GΩ 73dB 1.3MHz 1.5 mA
RS庫存編號 177-7115
製造零件編號EL8170FSZ
BrandIntersil
TWD87.50
毎管:97 個
單位
Single SOIC Surface Mount 3 V, 5 V 8 - Rail to Rail Input/Output 0.2mV -40 °C +125 °C - 90dB - 0.095 mA
RS庫存編號 636-227
製造零件編號INA101HP
TWD719.00
單位
Dual PDIP Through Hole - 14 ±15V No 250µV 0 °C +70 °C 10GΩ - 300kHz -
RS庫存編號 518-069
製造零件編號EL8170FSZ
BrandIntersil
TWD102.80
/個 (每包:5個)
單位
Single SOIC Surface Mount 3 V, 5 V 8 - Rail to Rail Input/Output 0.2mV -40 °C +125 °C - 90dB - 0.095 mA
RS庫存編號 100-0741
製造零件編號INA101HP
TWD633.70
毎管:25 個
單位
Dual PDIP Through Hole - 14 ±15V - 250µV 0 °C +70 °C 10GΩ - 300kHz -
RS庫存編號 461-6536
製造零件編號INA128UA
TWD402.00
單位
Dual SOIC Surface Mount - 8 ±15V No 125µV -40 °C +85 °C 100GΩ 73dB 1.3MHz -
RS庫存編號 759-2578
製造零件編號AD8497ARMZ
TWD226.00
單位
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庫存編號 709-5761
製造零件編號AD524ADZ
TWD1,534.00
單位
Dual SBCDIP Through Hole - 16 ±15V No 0.25mV -40 °C +85 °C 1GΩ 70dB 25MHz -