FEATURES Ultralow input bias current

60 fA maximum (AD549L)

100 fA maximum (AD549K)

250 fA maximum (AD549J)

Input bias current guaranteed over the common-mode

voltage range Low offset voltage

0.50 mV maximum (AD549K)

1.00 mV maximum (AD549J)

Low offset drift 15 μV/°C maximum (AD549K)

20 μV/°C maximum (AD549J)

Low power

700 μA maximum supply current

Low input voltage noise

4 μV (typ) p-p over 0.1 Hz to 10 Hz MIL-STD-883B parts available APPLICATIONS

Electrometer amplifier

Photodiode preamp

pH electrode buffer