Difference Amplifiers

A difference amplifier is a special purpose amplifier designed to measure differential signals, otherwise known as a subtractor. A key feature of a difference amplifier is its ability to remove unwanted common mode signals, known as common mode rejection (CMR). Unlike most types of amplifiers, difference amplifiers are typically able to measure voltages beyond the supply rails, and are used in applications where large dc or ac common-mode voltages are present. They are ideal for current and voltage monitoring. We offer a range of difference amplifiers, optimized for low distortion, low power, or high voltage performance.

For higher speed and fully differential amplifiers, please see differential amplifiers. For amplifiers with higher input impedance, please see instrumentation amplifiers.

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AD629

Difference Amplifiers

Part# # ChannelsSlew RateBandwidth @ G=10Rail-Rail OutRail-Rail InSupply CurrentCMRRTHD+NInput Offset VoltageGain (min)NonlinearityVos TCMinimum Input Common ModeMaximum Input Common ModeGain ErrorGain TCInput Voltage NoiseIn Amp Architecture
AD8479--130KHzNo-650µA90dB-500µV1V/V5ppm3µV/degC-600V600V0.01%3ppm/C-Difference Amp
ADA4830-1Reference Circuit Available1220V/µs-NoYes6.8mA65dB------8.5V8.5V---Difference Amp
AD827921.4V/µs1MHzYesNo200µA80dB-50µV500mV/V-300nV/degC-45.3V40.5V0.2%1ppm/C47nV/rtHzDifference Amp
AD827721.1V/µs550KHzYesYes200µA86dB-200µV1V/V5ppm2µV/degC-30.2V27V0.02%1ppm/C65nV/rtHzDifference Amp
AD827811.4V/µs1MHzYesYes200µA80dB-100µV500mV/V7ppm1µV/degC-45.3V40.5V0.02%1ppm/C47nV/rtHzDifference Amp
AD8276Reference Circuit Available11.1V/µs550KHzYesYes200µA86dB-200µV1V/V5ppm2µV/degC-30.2V27V0.02%1ppm/C65nV/rtHzDifference Amp
AD8271Reference Circuit Available130V/µs20MHzYesYes2.6mA76dB110dB600µV500mV/V1ppm2µV/degC-15.4V15.4V0.02%2ppm/C38V/rtHzDifference Amp
AD8274Reference Circuit Available120V/µs20MHzNoYes2.6mA77dB112dB700µV500mV/V2ppm3µV/degC-40.5V40.5V0.03%2ppm/C26nV/rtHzDifference Amp
AD8275Reference Circuit Available125V/µs15MHzYesYes1.9mA86dB106dB500µV200mV/V3ppm7µV/degC-12.3V12V0.024%1ppm/C40nV/rtHzDifference Amp
AD8270230V/µs20MHzYesYes2.5mA76dB145dB1mV500mV/V-2µV/degC-15.4V15.4V0.08%10ppm/C38V/rtHzDifference Amp
AD8273Reference Circuit Available220V/µs20MHzNoYes2.5mA77dB112dB700µV500mV/V50ppm3µV/degC-40.5V40.5V0.05%10ppm/C26nV/rtHzDifference Amp
AD628Reference Circuit Available1300mV/µs600KHzNoYes1.6mA75dB-1.5mV100mV/V5ppm8µV/degC-120V120V0.1%5ppm/C300V/rtHzDifference Amp
AD629Reference Circuit Available12.1V/µs500KHzNoYes1mA90dB-500µV1V/V10ppm10µV/degC-270V270V0.03%10ppm/C550V/rtHzDifference Amp
AD626-220mV/µs100KHzNoNo2mA66dB-500µV10V/V140ppm6µV/degC-24V24V1%150ppm/C-Current Sense, Difference Amp
AMP0319.5V/µs3MHzNoYes2.5mA100dB-400V1V/V---20V20V0.008%-90V/rtHzDifference Amp
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