AD8244A Datasheet PDF - ADI

●GENERAL DESCRIPTION

●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 well into the megaohms.

●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 drift (B grade)

●3 MHz bandwidth

●Unique pinout

●  No leakage from inputs to supply pins

●  Provides guarding capability

●Rail-to-rail output

●Single-supply operation

●  Input range extends to ground

●Wide supply range

●  Single-supply: 3 V to 36 V

●  Dual-supply: ±1.5 V to ±18 V

●Available in a compact 10-lead MSOP

●APPLICATIONS

●Biopotential electrodes

●Medical instrumentation

●High impedance sensor conditioning

●Filters

●Photodiode amplifiers