Q
Why are there no X-filt and Y-filt pins on ADIS16203 unlike ADIS16001?
A
The X-filt and Y-filt pins were not included as a result of a trade-off with
the pinout. The on-board digital filtering provides a method for reducing the
bandwidth, which does not require external components.
Check out page 18 on the datasheet of ADIS16203 (RevB)