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)US Price 1000 to 4999
ADA4666-2 2 2.1 MHz 4 MHz 2 V/µs 3 18 500 µV 630 µA 500 fA 145 80 $0.85
ADA4661-2 2 2.1 MHz 4 MHz 2 V/µs 3 18 30 µV 630 µA 0.5 pA 145 90 $1.13
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 $0.98
ADA4691-4 4 3.6 MHz 3.6 MHz 1.3 V/µs 2.7 5 500 µV 180 µA 500 fA 90 75 $0.90
ADA4691-2 2 3.6 MHz 3.6 MHz 1.3 V/µs 2.7 5 500 µV 180 µA 500 fA 90 75 $0.57
ADA4627-1Reference Circuit Available 1 19 MHz 19 MHz 40 V/µs 10 30 70 µV 7 mA 1 pA - 106 $3.47
ADA4505-1 1 50 kHz 50 kHz 6 mV/µs 1.8 5 500 µV 9 µA 500 fA 110 90 $0.41
ADA4665-2 2 1.2 MHz 1.2 MHz 1 V/µs 5 16 4 mV 290 µA 1 pA 95 55 $0.70
ADA4505-4 4 50 kHz 50 kHz 6 mV/µs 1.8 5 500 µV 7 µA 500 fA 110 90 $1.01
ADA4505-2Reference Circuit Available 2 50 kHz 50 kHz 6 mV/µs 1.8 5 500 µV 7 µA 500 fA 110 90 $0.57
AD8639Reference Circuit Available 2 1.5 MHz 1.35 MHz 2 V/µs 5 16 3 µV 1.5 mA 1 pA 143 127 $1.86
AD8669 4 520 kHz 540 kHz 0.26 V/µs 5 16 40 µV 285 µA 300 fA 105 87 $2.70
AD8647 2 24 MHz 24 MHz 11 V/µs 2.7 5.5 600 µV 2 mA 300 fA 80 67 $0.71
AD8638Reference Circuit Available 1 1.5 MHz 1.35 MHz 2 V/µs 5 16 3 µV 1.5 mA 1 pA - 127 $1.08
AD8663Reference Circuit Available 1 540 kHz 540 kHz 0.3 V/µs 5 16 40 µV 285 µA 300 fA 105 87 $1.17
AD8646Reference Circuit Available 2 24 MHz 24 MHz 11 V/µs 2.7 5.5 600 µV 2 mA 300 fA 80 67 $0.61
AD8667 2 520 kHz 540 kHz 0.26 V/µs 5 16 40 µV 285 µA 300 fA 105 87 $1.58
AD8504 4 7 kHz 7 kHz 0.004 V/µs 1.8 5.5 500 µV 1 µA 1 pA 105 67 $1.00
AD8502 2 7 kHz 7 kHz 0.004 V/µs 1.8 5.5 500 µV 1 µA 1 pA 105 67 $0.70
AD8665 1 4 MHz 4 MHz 3.5 V/µs 5 16 50 µV 1.55 mA 300 fA 115 90 $0.83
AD8666 2 4 MHz 4 MHz 3.5 V/µs 5 16 600 µV 1.55 mA 200 fA 115 90 $0.93
AD8664 4 4 MHz 4 MHz 3.5 V/µs 5 16 50 µV 1.55 mA 300 fA 110 90 $2.23
AD8668 4 4 MHz 4 MHz 3.5 V/µs 5 16 600 µV 1.55 mA 200 fA 115 90 $1.75
AD8662Reference Circuit Available 2 4 MHz 4 MHz 3.5 V/µs 5 16 30 µV 1.55 mA 300 fA 110 90 $1.37
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 $0.71
AD8648 4 22 MHz 24 MHz 12 V/µs 2.7 5.5 600 µV 2 mA 300 fA 80 67 $0.88
AD8613 1 400 kHz 400 kHz 0.1 V/µs 1.8 5 400 µV 38 µA 200 fA 94 95 $0.46
AD8661 1 4 MHz 4 MHz 3.5 V/µs 5 16 30 µV 1.4 mA 300 fA 110 90 $1.08
AD8619 4 400 kHz 400 kHz 0.1 V/µs 1.8 5 400 µV 38 µA 200 fA 94 68 $1.11
AD8617Reference Circuit Available 2 400 kHz 400 kHz 0.1 V/µs 1.8 5 400 µV 38 µA 200 fA 94 68 $0.71
AD8694Reference Circuit Available 4 10 MHz 10 MHz 5 V/µs 2.7 6 400 µV 0.95 mA 200 fA 95 70 $0.80
AD8643 4 3.5 MHz 3.5 MHz 3 V/µs 5 26 50 µV 290 µA 250 fA 107 90 $3.85
AD8642 2 3.5 MHz 3.5 MHz 3 V/µs 5 26 50 µV 290 µA 250 fA 107 90 $2.35
AD8691 1 10 MHz 10 MHz 5 V/µs 2.7 6 400 µV 1.05 mA 200 fA 95 70 $0.44
AD8615Reference Circuit Available 1 23 MHz 24 MHz 12 V/µs 2.7 6 80 µV 1.7 mA 200 fA 90 80 $0.76
AD8692Reference Circuit Available 2 10 MHz 10 MHz 5 V/µs 2.7 6 400 µV 1.05 mA 200 fA 95 70 $0.60
AD8652 2 50 MHz 50 MHz 41 V/µs 2.7 5.5 100 µV 9 mA 1 pA 94 84 $1.99
AD8641Reference Circuit Available 1 3.5 MHz 3.5 MHz 3 V/µs 5 26 50 µV 290 µA 250 fA 107 90 $1.47
AD8618Reference Circuit Available 4 24 MHz 24 MHz 12 V/µs 2.7 6 23 µV 2 mA 200 fA 90 80 $2.29
AD8616 2 24 MHz 24 MHz 12 V/µs 2.7 6 80 µV 2 mA 200 fA 90 80 $1.29
AD8651 1 50 MHz 50 MHz 41 V/µs 2.7 5.5 100 µV 9 mA 1 pA 94 80 $1.13
AD8626 2 5 MHz 5 MHz 5 V/µs 5 26 50 µV 850 µA 250 fA 104 76 $2.63
AD8625 4 5 MHz 5 MHz 5 V/µs 5 26 50 µV 850 µA 250 fA 104 76 $4.09
AD8609Reference Circuit Available 4 400 kHz 400 kHz 0.1 V/µs 1.8 5 12 µV 50 µA 200 fA 100 85 $1.85
AD8607 2 400 kHz 400 kHz 0.1 V/µs 1.8 5 12 µV 50 µA 200 fA 100 85 $1.02
AD8603Reference Circuit Available 1 400 kHz 400 kHz 0.1 V/µs 1.8 6 12 µV 50 µA 200 fA 100 85 $0.68
AD8627Reference Circuit Available 1 5 MHz 5 MHz 5 V/µs 5 26 50 µV 850 µA 250 fA 104 76 $1.60
AD8608Reference Circuit Available 4 10 MHz 10 MHz 5 V/µs 2.7 6 20 µV 1.2 mA 200 fA 95 85 $1.58
AD8605Reference Circuit Available 1 10 MHz 10 MHz 5 V/µs 2.7 6 20 µV 1.2 mA 200 fA 95 85 $0.68
AD8606Reference Circuit Available 2 10 MHz 10 MHz 5 V/µs 2.7 6 20 µV 1.2 mA 200 fA 95 85 $1.19
AD8604 4 8.4 MHz 8.4 MHz 6 V/µs 2.7 6 500 µV 1.2 mA 200 fA 75 74 $0.90
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 $0.36
AD8602 2 8.4 MHz 8.4 MHz 6 V/µs 2.7 6 500 µV 1.2 mA 200 fA 75 74 $0.44
AD795 1 1.6 MHz 1.6 MHz 1 V/µs 8 36 100 µV 1.5 mA 1 pA 110 90 $3.38
AD549 1 1 MHz 1 MHz 3 V/µs 10 36 500 µV 700 µA 40 fA 90 90 $22.26
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