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#Single/Dual SupplyVsupply Span (min)Vsupply Span (max)Bandwidth at min gain (typGain V/V (min)Gain V/V (max)Gain Setting MethodVoltage Noise RTIInput Headroom from V-Isupply (typ)Bias CurrentMin CMRR @60Hz Max GainMin CMRR @ 60 Hz Min GainInput Voltage NoiseUS Price 1000-4999In Amp Architecture
AD8232 - 2 3.5 2 kHz 100 100 - 14 µV p-p - 170 µA 50 pA 80 80 100 nV/rtHz $1.36 In-Amp
AD8237Reference Circuit Available Single 1.8 5.5 200 kHz 1 10000 Resistor 1.5 µV p-p 0.3 V 115 µA 250 pA 114 106 68 nV/rtHz $0.93 In-Amp
AD8421 Dual 5 36 10 MHz 1 1000 Resistor 2 µV p-p 2.3 2.3 mA 100 pA 140 94 3 nV/rtHz $2.35 In-Amp
AD8420Reference Circuit Available Single/Dual 2.7 36 250 kHz 1 1000 Resistor 1.5 µV p-p - 80 µA 20 nA 100 100 55 nV/rtHz $0.89 In-Amp
AD8428 Dual 8 36 3.5 MHz 2000 2000 fixed 40 nV p-p - 6.5 mA 200 nA 130 130 1.5 nV/rtHz $6.60 In-Amp
AD8426 Single/Dual 2.2 36 1.5 MHz 1 1000 Resistor 0.5 µV p-p 0.1 350 µA 20 nA 110 90 24 µV/rtHz $2.20 In-Amp
AD8429 Dual 8 36 15 MHz 1 1000 Resistor 2 µV p-p - 6.7 mA 150 nA 140 90 1 nV/rtHz $3.50 In-Amp
AD8235 Single 1.8 5.5 23 kHz 5 200 Resistor 4 µV p-p - 40 µA 1 pA 110 94 76 nV/rtHz $0.99 In-Amp
AD8236 Single 1.8 5.5 23 kHz 5 200 Resistor 4 µV p-p - 40 µA 1 nA 110 94 70 nV/rtHz $0.99 In-Amp
AD8227Reference Circuit Available Single/Dual 2.2 36 250 kHz 5 1000 Resistor 1.5 µV p-p -0.1 400 µA 20 nA 105 90 24 nV/rtHz $1.04 In-Amp
AD8226Reference Circuit Available Single/Dual 2.2 36 1.5 MHz 1 1000 Resistor 2 µV p-p -0.1 400 µA 20 nA 105 80 22 nV/rtHz $1.05 In-Amp
AD8295Reference Circuit Available Dual 4.6 36 1.2 MHz 1 1000 Resistor 2 µV p-p 1.9 2.3 mA 0.2 nA 130 80 8 nV/rtHz $2.03 In-Amp
AD8223 Single/Dual 3 24 125 kHz 5 1000 Resistor 1 µV p-p 0.15 0.5 mA 12 nA 90 80 30 nV/rtHz $1.05 In-Amp
AD8293G80 Single 1.8 5.5 500 kHz 80 80 fixed 0.7 µV p-p - 1.3 mA 0.4 nA 94 94 35 nV/rtHz $0.50 Current Sense
AD8293G160 Single 1.8 5.5 500 kHz 160 160 fixed 0.7 µV p-p - 1.3 mA 0.4 nA 94 94 35 nV/rtHz $0.50 Current Sense
AD8253Reference Circuit Available Dual 10 34 10 MHz 1 1000 Digital 2.5 µV p-p 1 5.3 mA 5 nA 100 80 10 nV/rtHz $4.95 In-Amp
AD8228 Dual 4.6 36 650 kHz 10 100 Pin 0.5 µV p-p 1.9 1 mA 0.4 nA 120 100 8 nV/rtHz $3.03 In-Amp
AD8557 Single 2.7 5.5 600 kHz 28 1300 Digital 0.5 µV p-p 0.6 1.8 mA 18 nA 96 75 32 nV/rtHz $2.13 In-Amp
AD8290 Single 2.6 5.5 250 Hz 50 50 fixed 0.75 µV p-p 0.2 1.8 mA 100 pA 110 110 35 nV/rtHz $1.52 Difference Amp
AD8251 Dual 10 34 10 MHz 1 8 Digital 2.5 µV p-p 1.5 4.5 mA 5 nA 98 80 18 nV/rtHz $5.01 In-Amp
AD8231 Single 3 6 2.7 MHz 1 128 Digital 1.1 µV p-p - 5 mA 250 pA 110 80 32 nV/rtHz $1.71 In-Amp
AD8250 Dual 10 34 10 MHz 1 10 Digital 2.5 µV p-p 1.5 4.5 mA 5 nA 98 80 18 nV/rtHz $5.01 In-Amp
AD8224 Single/Dual 4.6 36 1.5 MHz 1 1000 Resistor 5 µV p-p -0.1 0.75 mA 10 pA 94 78 14 nV/rtHz $4.17 In-Amp
AD8222 Dual 3 24 1.2 MHz 1 1000 Resistor 2 µV p-p 1.9 1.1 mA 0.2 nA 130 80 8 nV/rtHz $3.63 In-Amp
AD8220Reference Circuit Available Single/Dual 4.6 36 1.5 MHz 1 1000 Resistor 5 µV p-p -0.1 750 µA 10 pA 94 78 14 nV/rtHz $2.32 In-Amp
AD8553 Single 1.8 5.5 1 kHz 1 1000 Resistor 0.7 µV p-p - 1.3 mA 0.4 nA 120 80 27 nV/rtHz $1.32 In-Amp
AD8556 Single 4.5 5.5 280 kHz 70 1280 Digital 0.5 µV p-p 2.1 2.7 mA 49 nA 94 80 32 nV/rtHz $2.88 In-Amp
AD8230 Single/Dual 8 16 2 kHz 2 1000 Resistor 3 µV p-p 0 3.5 mA 33 pA 110 110 240 nV/rtHz $2.99 In-Amp
AD8221Reference Circuit Available Dual 4.6 36 825 kHz 1 1000 Resistor 2 µV p-p 1.9 1 mA 0.2 nA 130 80 8 nV/rtHz $2.01 In-Amp
AD8225 Dual 3.4 36 900 kHz 5 5 fixed 1.5 µV p-p 1.6 1.2 mA 0.5 nA 86 86 45 nV/rtHz $3.36 In-Amp
AD627 Single/Dual 2.2 36 80 kHz 5 1000 Resistor - -0.1 0.085 mA 3 nA 77 77 38 nV/rtHz $2.61 In-Amp
AD623 Single/Dual 2.7 12 800 kHz 1 1000 Resistor 2 µV p-p -0.15 0.55 mA 17 nA 105 70 35 nV/rtHz $1.43 In-Amp
AD622 Dual 5.2 36 1 MHz 1 1000 Resistor 4 µV p-p 1.9 1.3 mA 2 nA 103 66 12 nV/rtHz $2.56 In-Amp
AD22057 Single 3 26 30 kHz 20 20 - - - 0.5 mA - - - - $4.71 Current Sense
AMP04 Single/Dual 5 36 700 kHz 1 1000 Resistor 7 µV p-p 0 0.9 mA 22 nA 75 50 25 nV/rtHz $5.60 In-Amp
AD621 Dual 4.6 36 800 kHz 10 100 Pin 0.55 µV p-p 1.9 1.3 mA 0.5 nA 110 93 9 nV/rtHz $4.34 In-Amp
AD620Reference Circuit Available Dual 4.6 36 1 MHz 1 10000 Resistor 3 µV p-p 1.9 1.3 mA 0.5 nA 110 73 9 nV/rtHz $3.38 In-Amp
AMP02 Dual 9 36 1.2 MHz 1 10000 Resistor 1.2 µV p-p 4 6 mA 2 nA 110 75 9 nV/rtHz $6.16 In-Amp
AD526 Dual 9 33 350 kHz 1 16 Digital 3 µV p-p 5 14 mA 50 pA - - 30 nV/rtHz $6.85 In-Amp
AD625 Dual 12 36 650 kHz 1 10000 Resistor 10 µV p-p 3 5 mA 50 nA 110 70 4 nV/rtHz $9.41 In-Amp
AMP01 Dual - - 570 kHz 0.1 10000 Resistor 13 µV p-p - 4.8 mA 1 nA - - - $10.44 In-Amp
AD624 Dual 12 36 1 MHz 1 1000 Pin 10 µV p-p 3 5 mA 15 nA 110 70 4 nV/rtHz $22.10 In-Amp
AD524 Dual 12 36 1 MHz 1 1000 Pin 15 µV p-p 3 5 mA 25 nA 110 70 7 nV/rtHz $9.52 In-Amp
AD522 Dual 10 36 30 kHz - - Resistor - 5 8 mA 25 nA 100 75 - - In-Amp
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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 - - - - $8.31
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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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