AD1582 Not Vout seen from the Reference - Family works only with C between Vout and GND

Document created by analog-archivist Employee on Feb 23, 2016
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The AD1582 does only show some mV (24mV - 60mV)at the Output.

 

A C (Capacitor) between Vout and GND is mandatory required for the Reference to
work.
A minimum C is not specified in the datasheet - I tested it with 100nF - it
worked for me but I cannot gurantee that this 100nF is enough for all AD1582 to
work.

It all has to do with the difference between emitter
followers and common emitter configurations,
higher Ft NPNs vs. slow PNPs and phase shift. 

http://www.national.com/assets/en/appnotes/techedge_jul2002.pdf#page=1

http://www.national.com/assets/en/appnotes/f10.pdf#page=1

http://www.ti.com/lit/an/snva020a/snva020a.pdf#page=2

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