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AD2S1210 looking at COS and SIN in x-y mode on a scope

Question asked by Philip314159 on Nov 29, 2017
Latest reply on Mar 13, 2018 by jcolao

I have a AD2S1210 converter and it is working but when I put a scope probe on SIN and another probe on COS and put the scope in X-Y mode I expect to get a circle when I rotate the resolver and instead I get an ellipse.  I have the AD2S1210 in differential mode.  when I run an older AD2S80 in single ended mode I see the circle I expect.