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The duty of AD652's output wave always change

Question asked by 626288415@qq.com on Feb 29, 2016
Latest reply on May 10, 2016 by Dirk

     I'm working on a Voltage to Frequecy Converter project, and I design AD652 in dual power supply and positive input mode. But the output wave of AD652 have some problem——The duty of the output wave always change. The wave picture is below:

WP_20160123_10_35_05_Pro.jpg

WP_20160123_10_38_02_Pro.jpg

WP_20160123_09_49_58_Pro.jpg

     What I am sure is that the output frequency increases when the input voltage increases. And the clock picture is below:

WP_20160123_09_53_35_Pro.jpg

     I am not sure whether it matters.

     Besides, I want to know the reason of the output problem? and how to deal with it?

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