10_V_WITH_TC_TRIMMlNG

Published:2009/7/15 22:09:00 Author:Jessie | From:SeekIC

Provides temperature-compensation trimming to give lowest possible reference-voltage drift for A/D converter. Reference zener is LM199A having 0.5 PPM/℃ drift that is independent of operating current. Low-drift combination of LM121 and LMl08A has drift predictably proportional to offset voltage, permitting use of potentiometers for trimming to better than 1 PPM/℃. Article gives details of trimming procedure to be used during temperature runs．- R. C. Dobkin, Don’t Forget Reference Stabillity When Desiging A-to-D Converters, EDN Magazine, June 20, 1977, p l05-108.



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