GENERAL DESCRIPTION
The AD680 is a band gap voltage reference that provides a fixed 2.5 V output from inputs between 4.5 V and 36 V. The architecture of the AD680 enables the reference to be operated at a very low quiescent current while still realizing excellent dc characteristics and noise performance. Trimming of the high stability thin-film resistors is performed for initial accuracy and temperature coefficient, resulting in low errors over temperature.

FEATURES
    Low quiescent current at 250 μA max
    Laser trimmed to high accuracy 2.5 V ± 5 mV max (AN, AR grades)
    Trimmed temperature coefficient 20 ppm/°C max (AN, AR grades)
    Low noise at 8 μV p-p from 0.1 Hz to 10 Hz
    250 nV/√Hz wideband
    Temperature output pin (N, R packages)
    Available in three package styles 8-lead PDIP, 8-lead SOIC, and 3-pin TO-92