AD8244 Datasheet (Analog Devices) - Precision FET Input Quad Buffer

AD8244, Precision FET Input Quad Buffer

The AD8244 is a precision, low power, FET input, quad unity-gain buffer that is designed to isolate very large source impedances from the rest of the signal chain.

The 2 pA maximum bias current, near zero current noise, and 10 TΩ input impedance introduce almost no error, even with source impedance

AD8244 Features

* Low power 250 µA maximum supply current per amplifier FET input 2 pA maximum input bias current at 25°C Extremely high input impedance Low noise 13 nV/√Hz voltage noise at 1 kHz 0.4 µV p-p voltage noise (0.1 Hz to 10 Hz) 0.8 fA/√Hz current noise at 1 kHz High dc precision 3 µV/°C maximum offset drif