Search FAQs on the left to see if your question has been answered. Click on the dropdown to view all of the documents associated with the product. If you can't find your question, click on Ask a Question

Why AD2S1200 pin20 toggling with /RDVEL low and Resolver stationary?

The signal bit (DB0) at pin 20 is toggling, when the /RDVEL is high (at the
same time sample by the signal /RD), while the resolver is rotating, and stays
at the last position when the resolver is stopped rotating.

But the same pin 20 (DB0) is toggling randomly when /RDVEL is low (at the same
time being sampled by the signal /RD), even when the resolver is stationary.



The AD2S1200's dynamic ripple specification is 1LSB typical and the overall
velocity accuracy specification that includes the dynamic ripple is 2 LSB max.
This means that a change in the LSB of the velocity output is highly possible
in your application.