Instrumentation Amplifiers

Instrumentation amplifiers (in-amps) are precision gain blocks that have a differential input and an output that may be differential, or single-ended with respect to a reference terminal. These devices amplify the difference between two input signal voltages while rejecting any signals that are common to both inputs. The in-amps are widely used in many industrial, measurement, data acquisition, and medical applications where dc precision and gain accuracy must be maintained within a noisy environment, and where large common-mode signals (usually at the ac power line frequency) are present. Analog Devices offers a complete line of precision, low-noise, low-power in-amps with excellent CMRR (common mode rejection ratio) for every application and market.

A Programmable Gain Instrumentation Amplifier (PGiA) is a special form of in-amp that has fixed gain levels. The appropriate gain level is selected by digital means, either by dedicated program pins, or by software interfaces (SPI or I2C). The PGiAs are perfect for those applications where gain accuracy must be maximized, or where a single PGiA can take the place of several in-amps of different gain settings.

Select parts from the selection table below to download datasheets and order samples.

Universal Evaluation Boards Boards are available for the AD62x and AD822x series. For all others, please click on the part# below and use the evaluation board found on the product page.

Have questions about ADI’s Amplifier products? Visit the Amplifiers Support Community on EngineerZone.

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Instrumentation Amplifiers

Part#Amp ArchitectureNumber of ChannelsVsupply Span (min)Vsupply Span (max)Iq/Amp (max)-3dB Bandwidth at min gain (typ)Slew Rate (typ)Gain (min)Gain (max)Gain Setting MethodInput Vos (max)CMRR @ min Gain (min)CMRR @ max Gain (min)Single/Dual Supply Operation
AD8422 In-Amp - 3.6 36 300 µA 2.2 MHz - 1 1000 - 8 nV 94 150 Single/Dual
AD8232 In-Amp - 2 3.5 170 µA 2 kHz - 100 100 - 3 mV 80 80 -
AD8237Reference Circuit Available In-Amp - 1.8 5.5 115 µA 200 kHz 0.05 1 10000 Resistor 30 µV 106 114 Single
AD8421 In-Amp 1 5 36 2.3 mA 10 MHz 35 1 1000 Resistor 25 µV 94 140 Dual
AD8420Reference Circuit Available In-Amp 1 2.7 36 80 µA 250 kHz 1 1 1000 Resistor 125 µV 100 100 Single/Dual
AD8428 In-Amp 1 8 36 6.5 mA 3.5 MHz 40 2000 2000 fixed 100 µV 130 130 Dual
AD8426 In-Amp 2 2.2 36 350 µA 1.5 MHz 0.6 1 1000 Resistor - 90 110 Single/Dual
AD8429 In-Amp 1 8 36 6.7 mA 15 MHz 22 1 1000 Resistor 50 µV 90 140 Dual
AD8235 In-Amp 1 1.8 5.5 40 µA 23 kHz 0.009 5 200 Resistor 25 µV 94 110 Single
AD8236 In-Amp - 1.8 5.5 40 µA 23 kHz - 5 200 Resistor 3500 µV 94 110 Single
AD8227Reference Circuit Available In-Amp 1 2.2 36 400 µA 250 kHz 0.6 5 1000 Resistor 200 µV 90 105 Single/Dual
AD8226Reference Circuit Available In-Amp - 2.2 36 400 µA 1.5 MHz 0.6 1 1000 Resistor 200 µV 80 105 Single/Dual
AD8295Reference Circuit Available In-Amp - 4.6 36 2.3 mA 1.2 MHz 2 1 1000 Resistor 120 µV 80 130 Dual
AD8223 In-Amp - 3 24 0.5 mA 125 kHz 0.2 5 1000 Resistor 25 µV 80 90 Single/Dual
AD8293G80 Current Sense - 1.8 5.5 1.3 mA 500 kHz - 80 80 fixed 50 µV 94 94 Single
AD8293G160 Current Sense - 1.8 5.5 1.3 mA 500 kHz - 160 160 fixed 50 µV 94 94 Single
AD8253Reference Circuit Available In-Amp - 10 34 5.3 mA 10 MHz 20 1 1000 Digital 150 µV 80 100 Dual
AD8228 In-Amp - 4.6 36 1 mA 650 kHz 2.5 10 100 Pin 90 µV 100 120 Dual
AD8557 In-Amp - 2.7 5.5 1.8 mA 600 kHz 1.2 28 1300 Digital 10 µV 75 96 Single
AD8290 Difference Amp 1 2.6 5.5 1.8 mA 250 Hz - 50 50 fixed 700 µV 110 110 Single
AD8251 In-Amp - 10 34 4.5 mA 10 MHz 30 1 8 Digital 200 µV 80 98 Dual
AD8231 In-Amp - 3 6 5 mA 2.7 MHz 1.1 1 128 Digital 15 µV 80 110 Single
AD8250 In-Amp - 10 34 4.5 mA 10 MHz 30 1 10 Digital 200 µV 80 98 Dual
AD8224 In-Amp - 4.6 36 0.75 mA 1.5 MHz 2 1 1000 Resistor 300 µV 78 94 Single/Dual
AD8222 In-Amp - 3 24 1.1 mA 1.2 MHz 2.5 1 1000 Resistor 120 µV 80 130 Dual
AD8220Reference Circuit Available In-Amp - 4.6 36 750 µA 1.5 MHz 2 1 1000 Resistor 125 µV 78 94 Single/Dual
AD8553 In-Amp - 1.8 5.5 1.3 mA 1 kHz - 1 1000 Resistor 20 µV 80 120 Single
AD8556 In-Amp - 4.5 5.5 2.7 mA 280 kHz 1.2 70 1280 Digital 10 µV 80 94 Single
AD8230 In-Amp - 8 16 3.5 mA 2 kHz 2 2 1000 Resistor 10 µV 110 110 Single/Dual
AD8221Reference Circuit Available In-Amp - 4.6 36 1 mA 825 kHz 2.5 1 1000 Resistor 60 µV 80 130 Dual
AD8225 In-Amp - 3.4 36 1.2 mA 900 kHz 5 5 5 fixed 50 µV 86 86 Dual
AD627 In-Amp - 2.2 36 0.085 mA 80 kHz 0.05 5 1000 Resistor 50 µV 77 77 Single/Dual
AD623 In-Amp - 2.7 12 0.55 mA 800 kHz 0.3 1 1000 Resistor 25 µV 70 105 Single/Dual
AD622 In-Amp - 5.2 36 1.3 mA 1 MHz 1.2 1 1000 Resistor 60 µV 66 103 Dual
AMP04 In-Amp - 5 36 0.9 mA 700 kHz - 1 1000 Resistor 300 µV 50 75 Single/Dual
AD621 In-Amp - 4.6 36 1.3 mA 800 kHz 1.2 10 100 Pin 35 µV 93 110 Dual
AD620Reference Circuit Available In-Amp - 4.6 36 1.3 mA 1 MHz 1.2 1 10000 Resistor 30 mV 73 110 Dual
AMP02 In-Amp - 9 36 6 mA 1.2 MHz 6 1 10000 Resistor 200 µV 75 110 Dual
AD526 In-Amp - 9 33 14 mA 350 kHz 24 1 16 Digital 700 µV - - Dual
AD625 In-Amp - 12 36 5 mA 650 kHz 5 1 10000 Resistor 200 µV 70 110 Dual
AMP01 In-Amp - - - 4.8 mA 570 kHz - 0.1 10000 Resistor 100 V - - Dual
AD624 In-Amp - 12 36 5 mA 1 MHz 5 1 1000 Pin 200 µV 70 110 Dual
AD524 In-Amp - 12 36 5 mA 1 MHz 5 1 1000 Pin 250 µV 70 110 Dual
AD522 In-Amp - 10 36 8 mA 30 kHz 0.1 - - Resistor 100 µV 75 100 Dual
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4-20 mA Drivers

Part#ChannelsInput Voltage RangeVoltage Output RangesSettling Time (µs)Drift (ppm/°C)Current Output RangesCurrent Drift (ppm/°C)Input FormatVoltage Supply (min)Voltage Supply (max)Operating Temp RangeVREFFeaturesCurrent Output TUE (%FS)Output Voltage (TUE) (%)US Price 1000 to 4999
AD5749 1 0 to 4.096 V - - - 0 to 24 mA 5 SPI 12 55 -40 to +105 4.096 Fault Detection, PEC, ASYN CLR 0.15 - $1.80
AD5748 1 0 to 4.096 V +/- 10 V 7 µs 3 0 to 20 mA 5 SPI 12 48 -40 to +105 4.096 - 0.15 0.05 $2.15
AD5751Reference Circuit Available 1 0 to 4.096 V 0 to 10 V 7 µs 3 0 to 20 mA 5 SPI 10.8 55 -40 to +105 4.096 Output Fault Detection, PEC, ASYN CLR, 0 V or Tristate 0.08 0.05 $3.01
AD5750-1Reference Circuit Available 1 0 to 2.5 V +/- 10 V 7 µs 3 +/- 20 mA 5 SPI 12 24 -40 to +105 1.25 Output Fault Detection, PEC, Asyn CLR, 0 V or Tristate 0.03 0.02 $2.45
AD5750Reference Circuit Available 1 0 to 4.096 V +/- 10 V 7 µs 3 +/- 20 mA 5 SPI 12 24 -40 to +105 4.096 Output Fault Detection, PEC, ASYNC CLR, 0 V or Tristate 0.03 0.02 $2.45
AD5420Reference Circuit Available - - - - 38 - 7 Digital 10 60 -40 to +85 - - 0.6 - $4.95
AD5410Reference Circuit Available - - - - 26 - 7 SPI 10.8 60 -40 to +85 - - 0.1 - $3.75
AD421 - - - - 50 - - Digital 2.95 5.05 -40 to +85 - - - - $6.83
AD420 - - - 2500 µs 20 - - Digital 12 32 -40 to +85 - - - - $11.58
AD693 - - - - - - - Analog - - -40 to +85 - - - - $9.28
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Programmable Gain Instrumentation Amplifiers

Part#Single/Dual SupplyVsupply span (min)Vsupply span (max)Bandwidth at min gain (tyMin CMRR @60Hz Max GainMin CMRR @ 60 Hz Min GainInput Headroom from V-Gain Setting MethodIsupply (typ)Gain (min)Gain_(max)
AD8253Reference Circuit Available Dual 10 34 10 MHz 100 80 1 Digital 5.3 mA 1 1000
AD8557 Single 2.7 5.5 600 kHz 96 75 0.6 Digital 1.8 mA 28 1300
AD8251 Dual 10 34 10 MHz 98 80 1.5 Digital 4.5 mA 1 8
AD8231 Single 3 6 2.7 MHz 110 80 - Digital 5 mA 1 128
AD8250 Dual 10 34 10 MHz 98 80 1.5 Digital 4.5 mA 1 10
AD8556 Single 4.5 5.5 280 kHz 94 80 2.1 Digital 2.7 mA 70 1280
AD526 Dual 9 33 350 kHz - - 5 Digital 14 mA 1 16
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