ADIS16488A (Rev E, page 23, left column, second paragraph)
http://www.analog.com/media/en/technical-documentation/data-sheets/ADIS16488A.pdf#Page=23
PROBLEM DESCRIPTION
One of the codes in the example configuration sequence is not correct. Please see the following graphic for the precise location of the incorrect code.
SOLUTION
When using this reference, replace the 0x9657 code (see following graphic for specific location) with 0x962F
Revision F of this datasheet will address this problem.
OPEN