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.
R/D-converter's output is not linear (0-2degrees of non-linearity): There is a small phase shift of 2-3 degrees phase difference between sine and cosine input. R/D-converter's output is not linear. If I rotate the resolver one full round, the output of the converter has 0-2 degrees of non-linearity. The resolver is checked, and it is OK (only 5 arcmin error). What could be the problem?
A phase difference of 2-3 degrees between the sine and cosine inputs is quite a large phase difference and is the most likely cause of the errors. This phase difference may be due to the resolver you are using or due to a mismatch in the sine and cosine cables (different cable lengths or different loads could cause this differential phase shift). For further information, refer to page 13 of the datasheet, the section on differential phase shift. This section also provides some suggestions for minimising the errors caused by differential phase shift on the input signals.