AD549 Datasheet | Analog Devices

Data Sheet Features Ultralow input bias current 60 f A maximum (AD549L) 100 f A maximum (AD549K) 250 f A maximum (AD549J) Input bias current guaranteed over the mon-mode voltage range Low offset voltage 0.50 m V maximum (AD549K) 1.00 m V 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 p H electrode buffer GENERAL DESCRIPTION The AD549 is a monolithic electrometer operational amplifier with very low input bias current. Input offset voltage and input offset voltage drift are laser trimmed for precision performance. The ultralow input current of the part is achieved with Topgate™ JFET technology, a process development exclusive to Analog Devices, Inc. This technology allows fabrication of extremely low input current JFETs patible with a standard junction...