Differential Amplifiers | Analog Devices | RS
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    Differential Amplifiers

    A differential amplifier is a type of electronic amplifier that increases the difference between two input voltages. Differential amplifiers also suppress voltage to be common to the two inputs. A digital amplifier is one of the most used and important components within integrated circuits (ICs).

    Differential Amplifier inputs

    • One inverting
    • One non-inverting

    Why use a Differential Amplifier?

    Differential amplifiers are used to amplify balanced differential signals which are used to communicate small signals in electrically noisy environments. The signal wires should be close or wired together and most of the induced noise will be "common mode", affecting both wires in the same way.

    Differential Amplifier Applications

    The main application of a differential amplifier is to get rid of any noise and voltages that are present in both of the voltage inputs. This noise is present in common mode fluctuating voltage. Differential amplifiers are used in circuits that utilise negative feedback, such as controlling motors and signal amplification.

    Various electronic devices use differential amplifiers

    • FM/Am Radio signal recovery
    • Audio pre-amplifiers
    • Microphone pre-amplifiers
    • TV Signal recovery
    • Digital to analogue converters

    A Differential amplifier can also be configured to operate as a single-ended amplifier by grounding one of the inputs.

    Modern differential amplifiers normally sit on a single microchip. Inside the microchip, positive and negative signals are added and become a single output.

    What do CMRR and PSRR stand for?

    • CMRR is the abbreviated version of Common Mode Rejection Ratio and refers to the power ratio of differential gains between the common-mode gain. This unit is measured in positive decibels.
    • PSRR is the abbreviated version of Power Supply Rejection Ratio and refers to an amplifiers ability to consistently maintain output voltage white the DC voltage supplied is varied.

    94 Products showing for Differential Amplifiers

    Texas Instruments
    Dual
    -
    ±15V
    0.5mV
    0.05MΩ
    0dB
    -
    72dB
    -
    1
    Through Hole
    PDIP
    8
    -
    -
    Texas Instruments
    Dual, Single
    12 V, 15 V, 18 V, 24 V, 28 V, 5 V, 9 V
    ±15V
    1.5mV
    0.05MΩ
    0dB
    -
    74dB
    -
    1
    Surface Mount
    SOIC
    8
    -
    -
    Texas Instruments
    Dual, Single
    5 V
    ±15V
    2mV
    34MΩ
    78dB
    225MHz
    80dB
    -
    1
    Surface Mount
    MSOP
    8
    -
    -
    Texas Instruments
    Dual, Single
    5 V
    ±15V
    2mV
    34MΩ
    78dB
    225MHz
    80dB
    -
    1
    Surface Mount
    SOIC
    8
    -
    -
    Texas Instruments
    Dual, Single
    12 V, 15 V, 18 V, 24 V, 28 V, 5 V, 9 V
    ±12 V, ±15 V, ±3 V, ±5 V, ±9 V
    1mV
    0.08MΩ
    60dB
    -
    76dB
    -
    1
    Surface Mount
    SOIC
    8
    -
    -
    Texas Instruments
    Dual, Single
    5 V, 9 V
    ±3 V, ±5 V
    16.5mV
    0.000015MΩ
    0dB
    -
    -
    -
    1
    Surface Mount
    SOIC
    8
    -
    25 mA
    Texas Instruments
    Dual
    -
    ±15V
    0.5mV
    0.05MΩ
    0dB
    -
    72dB
    -
    1
    Through Hole
    PDIP
    8
    -
    -
    Texas Instruments
    Dual, Single
    5 V
    ±15V
    2mV
    34MΩ
    78dB
    225MHz
    80dB
    -
    1
    Surface Mount
    SOIC
    8
    -
    -
    Texas Instruments
    Dual
    -
    ±15V
    0.5mV
    0.024MΩ
    6.02dB
    -
    86dB
    -
    1
    Surface Mount
    SOIC
    8
    -
    -
    Texas Instruments
    Dual, Single
    36 V
    ±18V
    ±75µV
    -
    -
    300kHz
    -
    -
    2
    -
    SOIC
    14
    No
    -
    Texas Instruments
    Single
    2.5 → 5.5 V
    -
    ±2000µV
    200kΩ
    114dB
    27MHz
    90dB
    -
    1
    Surface Mount
    SOIC
    8
    Rail to Rail Output
    390 μA
    Texas Instruments
    Dual, Single
    12 V, 15 V, 18 V, 24 V, 28 V, 5 V, 9 V
    ±15V
    1.5mV
    0.05MΩ
    0dB
    -
    74dB
    -
    1
    Surface Mount
    SOIC
    8
    -
    -
    Texas Instruments
    Dual
    -
    ±15V
    0.5mV
    0.024MΩ
    6.02dB
    -
    86dB
    -
    1
    Surface Mount
    SOIC
    8
    -
    -
    Analog Devices
    Dual, Single
    12 V, 15 V, 18 V, 24 V, 28 V, 5 V, 9 V
    ±12 V, ±15 V, ±3 V, ±5 V, ±9 V
    3mV
    0.22MΩ
    40dB
    -
    75dB
    -
    2
    Surface Mount
    MSOP
    8
    -
    -
    Texas Instruments
    Dual
    -
    ±15V
    0.5mV
    0.11MΩ
    20dB
    -
    86dB
    -
    1
    Surface Mount
    SOIC
    8
    -
    -
    Texas Instruments
    Dual
    15 V
    ±7.5V
    -9/+1mV
    -
    -
    300MHz
    -
    -
    1
    -
    HVSSOP
    8
    No
    -
    Texas Instruments
    Dual
    -
    ±2.5 → ±18V
    -
    -
    -
    50MHz
    -
    -
    1
    Surface Mount
    SOIC
    8
    -
    -
    Analog Devices
    Single
    5 V, 9 V
    -
    2mV
    -
    40dB
    -
    82dB
    -
    1
    Surface Mount
    SOIC
    8
    -
    -
    Texas Instruments
    Single
    3 V, 5 V
    -
    0.5mV
    0.24MΩ
    13.98dB
    -
    80dB
    -
    1
    Surface Mount
    MSOP
    8
    Rail to Rail Input
    -
    Microchip
    Single
    2.5 V
    -
    -
    -
    -
    -
    -
    -
    -
    SMD
    MSOP
    8
    -
    -
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