LOW INPUT BIAS CURRENT AMPLIFIERS (<100 pA)

Low input bias current op amps are required whenever the difference of currents or voltage is small and it needs to be measured accurately. These op amps are used so that the signal is not loaded down by the input of the op amps. Low input bias current op amps are critical for interfacing sensors in applications from photodiodes, pH meters, or other electrometer-like functions to downstream electronics. Analog Devices has many precision op amps that fit the definition and range of these applications. Select parts from the parametric search table below to download parts datasheets and order samples.

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Precision Low Input Bias Amps

Part#Amps per Package-3dB Bandwidth at min gain (typ)GBP (typ)Slew Rate (typ)Vsupply Span (min)Vsupply Span (max)Vos (typ)Iq/Amp (typ)Ib (typ)PSRR (typ)CMRR (typ)Rail-Rail InRail-Rail OutIos (typ)
ADA4666-2 2 2.1 MHz 4 MHz 2 V/µs 3 18 500 µV 630 µA 500 fA 145 80 Yes Yes 11 pA
ADA4661-2 2 2.1 MHz 4 MHz 2 V/µs 3 18 30 µV 630 µA 0.5 pA 145 90 Yes Yes 11 pA
ADA4500-2Reference Circuit Available 2 10 MHz 10 MHz 8.7 V/µs 2.7 5.5 120 µV 1.55 mA 700 fA - 95 Yes Yes -
ADA4691-4 4 3.6 MHz 3.6 MHz 1.3 V/µs 2.7 5 500 µV 180 µA 500 fA 90 75 No Yes 1 pA
ADA4691-2 2 3.6 MHz 3.6 MHz 1.3 V/µs 2.7 5 500 µV 180 µA 500 fA 90 75 No Yes 1 pA
ADA4627-1Reference Circuit Available 1 19 MHz 19 MHz 40 V/µs 10 30 70 µV 7 mA 1 pA - 106 No No 0.5 pA
ADA4505-1 1 50 kHz 50 kHz 6 mV/µs 1.8 5 500 µV 9 µA 500 fA 110 90 Yes Yes 0.05 pA
ADA4665-2 2 1.2 MHz 1.2 MHz 1 V/µs 5 16 4 mV 290 µA 1 pA 95 55 Yes Yes 0.1 pA
ADA4505-4 4 50 kHz 50 kHz 6 mV/µs 1.8 5 500 µV 7 µA 500 fA 110 90 Yes Yes 50 fA
ADA4505-2Reference Circuit Available 2 50 kHz 50 kHz 6 mV/µs 1.8 5 500 µV 7 µA 500 fA 110 90 Yes Yes 50 fA
AD8639Reference Circuit Available 2 1.5 MHz 1.35 MHz 2 V/µs 5 16 3 µV 1.5 mA 1 pA 143 127 No Yes 20 pA
AD8669 4 520 kHz 540 kHz 0.26 V/µs 5 16 40 µV 285 µA 300 fA 105 87 No Yes 200 fA
AD8647 2 24 MHz 24 MHz 11 V/µs 2.7 5.5 600 µV 2 mA 300 fA 80 67 Yes Yes 0.1 pA
AD8638Reference Circuit Available 1 1.5 MHz 1.35 MHz 2 V/µs 5 16 3 µV 1.5 mA 1 pA - 127 No Yes 20 pA
AD8663Reference Circuit Available 1 540 kHz 540 kHz 0.3 V/µs 5 16 40 µV 285 µA 300 fA 105 87 No Yes 200 fA
AD8646Reference Circuit Available 2 24 MHz 24 MHz 11 V/µs 2.7 5.5 600 µV 2 mA 300 fA 80 67 Yes Yes 0.1 pA
AD8667 2 520 kHz 540 kHz 0.26 V/µs 5 16 40 µV 285 µA 300 fA 105 87 No Yes 200 fA
AD8504 4 7 kHz 7 kHz 0.004 V/µs 1.8 5.5 500 µV 1 µA 1 pA 105 67 Yes Yes 0.5 pA
AD8502 2 7 kHz 7 kHz 0.004 V/µs 1.8 5.5 500 µV 1 µA 1 pA 105 67 Yes Yes 0.5 pA
AD8665 1 4 MHz 4 MHz 3.5 V/µs 5 16 50 µV 1.55 mA 300 fA 115 90 No Yes 0.1 pA
AD8666 2 4 MHz 4 MHz 3.5 V/µs 5 16 600 µV 1.55 mA 200 fA 115 90 No Yes 0.1 pA
AD8664 4 4 MHz 4 MHz 3.5 V/µs 5 16 50 µV 1.55 mA 300 fA 110 90 No Yes 0.2 pA
AD8668 4 4 MHz 4 MHz 3.5 V/µs 5 16 600 µV 1.55 mA 200 fA 115 90 No Yes 0.1 pA
AD8662Reference Circuit Available 2 4 MHz 4 MHz 3.5 V/µs 5 16 30 µV 1.55 mA 300 fA 110 90 No Yes 200 fA
AD8500Reference Circuit Available 1 7 kHz 7 kHz 0.004 V/µs 1.8 5.5 235 µV 0.75 µA 1 pA 110 75 Yes Yes 0.5 pA
AD8648 4 22 MHz 24 MHz 12 V/µs 2.7 5.5 600 µV 2 mA 300 fA 80 67 Yes Yes 0.1 pA
AD8613 1 400 kHz 400 kHz 0.1 V/µs 1.8 5 400 µV 38 µA 200 fA 94 95 Yes Yes 0.1 pA
AD8661 1 4 MHz 4 MHz 3.5 V/µs 5 16 30 µV 1.4 mA 300 fA 110 90 No Yes 0.2 pA
AD8619 4 400 kHz 400 kHz 0.1 V/µs 1.8 5 400 µV 38 µA 200 fA 94 68 Yes Yes 0.1 pA
AD8617Reference Circuit Available 2 400 kHz 400 kHz 0.1 V/µs 1.8 5 400 µV 38 µA 200 fA 94 68 Yes Yes 0.1 pA
AD8694Reference Circuit Available 4 10 MHz 10 MHz 5 V/µs 2.7 6 400 µV 0.95 mA 200 fA 95 70 No Yes 0.1 pA
AD8643 4 3.5 MHz 3.5 MHz 3 V/µs 5 26 50 µV 290 µA 250 fA 107 90 No Yes 0.5 pA
AD8642 2 3.5 MHz 3.5 MHz 3 V/µs 5 26 50 µV 290 µA 250 fA 107 90 No Yes 0.5 pA
AD8691 1 10 MHz 10 MHz 5 V/µs 2.7 6 400 µV 1.05 mA 200 fA 95 70 No Yes 0.1 pA
AD8615Reference Circuit Available 1 23 MHz 24 MHz 12 V/µs 2.7 6 80 µV 1.7 mA 200 fA 90 80 Yes Yes 0.1 pA
AD8692Reference Circuit Available 2 10 MHz 10 MHz 5 V/µs 2.7 6 400 µV 1.05 mA 200 fA 95 70 No Yes 0.1 pA
AD8652 2 50 MHz 50 MHz 41 V/µs 2.7 5.5 100 µV 9 mA 1 pA 94 84 Yes Yes 1 pA
AD8641Reference Circuit Available 1 3.5 MHz 3.5 MHz 3 V/µs 5 26 50 µV 290 µA 250 fA 107 90 No Yes 0.5 pA
AD8618Reference Circuit Available 4 24 MHz 24 MHz 12 V/µs 2.7 6 23 µV 2 mA 200 fA 90 80 Yes Yes 0.1 pA
AD8616 2 24 MHz 24 MHz 12 V/µs 2.7 6 80 µV 2 mA 200 fA 90 80 Yes Yes 0.1 pA
AD8651 1 50 MHz 50 MHz 41 V/µs 2.7 5.5 100 µV 9 mA 1 pA 94 80 Yes Yes 1 pA
AD8626 2 5 MHz 5 MHz 5 V/µs 5 26 50 µV 850 µA 250 fA 104 76 No Yes 0.5 pA
AD8625 4 5 MHz 5 MHz 5 V/µs 5 26 50 µV 850 µA 250 fA 104 76 No Yes 0.5 pA
AD8609Reference Circuit Available 4 400 kHz 400 kHz 0.1 V/µs 1.8 5 12 µV 50 µA 200 fA 100 85 Yes Yes 0.1 pA
AD8607 2 400 kHz 400 kHz 0.1 V/µs 1.8 5 12 µV 50 µA 200 fA 100 85 Yes Yes 0.1 pA
AD8603Reference Circuit Available 1 400 kHz 400 kHz 0.1 V/µs 1.8 6 12 µV 50 µA 200 fA 100 85 Yes Yes 0.1 pA
AD8627Reference Circuit Available 1 5 MHz 5 MHz 5 V/µs 5 26 50 µV 850 µA 250 fA 104 76 No Yes 0.5 pA
AD8608Reference Circuit Available 4 10 MHz 10 MHz 5 V/µs 2.7 6 20 µV 1.2 mA 200 fA 95 85 Yes Yes 100 fA
AD8605Reference Circuit Available 1 10 MHz 10 MHz 5 V/µs 2.7 6 20 µV 1.2 mA 200 fA 95 85 Yes Yes 100 fA
AD8606Reference Circuit Available 2 10 MHz 10 MHz 5 V/µs 2.7 6 20 µV 1.2 mA 200 fA 95 85 Yes Yes 100 fA
AD8604 4 8.4 MHz 8.4 MHz 6 V/µs 2.7 6 500 µV 1.2 mA 200 fA 75 74 Yes Yes 100 fA
AD8601Reference Circuit Available 1 8.4 MHz 8.4 MHz 6 V/µs 2.7 6 500 µV 1.2 mA 200 fA 75 74 Yes Yes 100 fA
AD8602 2 8.4 MHz 8.4 MHz 6 V/µs 2.7 6 500 µV 1.2 mA 200 fA 75 74 Yes Yes 100 fA
AD795 1 1.6 MHz 1.6 MHz 1 V/µs 8 36 100 µV 1.5 mA 1 pA 110 90 No No 100 fA
AD549 1 1 MHz 1 MHz 3 V/µs 10 36 500 µV 700 µA 40 fA 90 90 No No 50 fA
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