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AD8302 voltage dips

Question asked by frankd on Jan 13, 2015
Latest reply on Jan 9, 2016 by bohdan200
Branched to a new discussion


I am using the AD8302 and am baffed.  I am expecting a stable voltage for the phase change, in a system that is supposedly stable from changes we are seeing a weird waveform when the output is digitized. I've attached an image of what we are seeing, there is a weird dip.With this particular test the system is stable with no expected phase change at all, however, if I'm interpreting the waveform correctly, the phase changes drastically approximately 12 times a second.  Any insight as to why this is happening would be very much appreciated.  Both input frequencies are 100kHz.

Thank you,