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    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 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

    222 Products showing for Instrumentation Amplifiers

    Each
    MYR57.75
    Texas Instruments
    Dual
    SOL
    Surface Mount
    -
    16
    ±12 V, ±15 V, ±3 V, ±5 V, ±9 V
    No
    125µV
    -40 °C
    +85 °C
    10GΩ
    110dB
    1MHz
    3 mA
    Each (In a Pack of 5)
    MYR11.714
    Microchip
    Single
    MSOP
    Surface Mount
    1.8 → 5.5 V
    8
    -
    Rail to Rail Output
    85µV
    -40 °C
    +125 °C
    1kΩ
    89dB
    500kHz
    -
    Each (In a Tube of 50)
    MYR61.665
    Texas Instruments
    Dual, Single
    PDIP
    Through Hole
    5 V, 9 V, 12 V, 15 V, 18 V, 24 V, 28 V
    8
    ±15V
    -
    0.125mV
    -40 °C
    +85 °C
    10GΩ
    106dB
    -
    3 mA
    Each (Supplied in a Tube)
    MYR81.72
    Texas Instruments
    Dual
    PDIP
    Through Hole
    18 V
    8
    -
    -
    ±125µV
    -
    -
    -
    -
    -
    -
    Each (In a Pack of 2)
    MYR30.695
    Texas Instruments
    Dual
    PDIP
    Through Hole
    ±15 V
    8
    -
    -
    ±1000µV
    -
    -
    -
    -
    -
    -
    Each (In a Pack of 5)
    MYR11.162
    Microchip
    Single
    MSOP
    Surface Mount
    1.8 → 5.5 V
    8
    -
    Rail to Rail Output
    22µV
    -40 °C
    +125 °C
    1kΩ
    103dB
    5MHz
    -
    Each (In a Tube of 50)
    MYR102.113
    Texas Instruments
    Dual
    PDIP
    Through Hole
    -
    8
    ±15V
    -
    -
    -40 °C
    +85 °C
    10000GΩ
    80dB
    -
    4.5 mA
    Each
    MYR37.62
    Texas Instruments
    Dual, Single
    SOIC
    Surface Mount
    5 V
    16
    ±15V
    No
    0.25mV
    -55 °C
    +125 °C
    100GΩ
    78dB
    -
    -
    Each
    MYR20.72
    Texas Instruments
    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
    Each
    MYR76.20
    Texas Instruments
    Dual, Single
    PDIP
    Through Hole
    12 V, 15 V, 18 V, 24 V, 28 V, 5 V, 9 V
    8
    ±15V
    No
    0.125mV
    -40 °C
    +85 °C
    10GΩ
    106dB
    -
    3 mA
    Each (In a Pack of 5)
    MYR11.124
    Texas Instruments
    Single
    VSSOP
    Surface Mount
    7.5 V
    8
    -
    Rail to Rail Output
    250µV
    -
    -
    -
    -
    25MHz
    -
    Each (Supplied in a Tube)
    MYR62.27
    Texas Instruments
    Dual
    SOIC
    Surface Mount
    ±15 V
    8
    -
    -
    50µV
    -
    -
    -
    -
    -
    -
    Each
    MYR84.44
    Texas Instruments
    Dual
    SOIC
    Surface Mount
    -
    16
    ±15V
    No
    125µV
    -40 °C
    +85 °C
    10GΩ
    75dB
    1MHz
    7.5 mA
    Each (Supplied in a Tube)
    MYR40.46
    Texas Instruments
    Single
    SOIC
    Surface Mount
    1.8 to 24 V
    8
    -
    -
    1mV
    -40 °C
    +85 °C
    126MΩ
    107dB
    18MHz
    -
    • RS Stock No. 660-5204P
    • Mfr. Part No. INA111BP
    Each (Supplied in a Tube)
    MYR108.14
    Texas Instruments
    Dual
    PDIP
    Through Hole
    -
    8
    ±15V
    No
    -
    -40 °C
    +85 °C
    10000GΩ
    80dB
    -
    4.5 mA
    Each (In a Pack of 5)
    MYR12.72
    Texas Instruments
    Dual, Single
    VSSOP
    Surface Mount
    2.7 → 36 V
    8
    ±1.35 → ±18V
    Rail to Rail Output
    150µV
    -40 °C
    +125 °C
    -
    88dB
    600kHz
    200 μA
    Each (Supplied in a Tube)
    MYR35.595
    Texas Instruments
    Dual
    PDIP
    Through Hole
    ±15 V
    16
    -
    -
    ±250µV
    -
    -
    -
    -
    -
    -
    Each
    MYR49.33
    Texas Instruments
    Dual
    SOIC
    Surface Mount
    -
    8
    ±15V
    No
    125µV
    -40 °C
    +85 °C
    100GΩ
    73dB
    1.3MHz
    -
    Each
    MYR90.68
    Texas Instruments
    Dual
    SOIC
    Surface Mount
    -
    16
    ±15V
    No
    -
    -25 °C
    +85 °C
    5000GΩ
    106dB
    -
    4.5 mA
    Each (Supplied on a Reel)
    MYR20.72
    Texas Instruments
    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
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