I would like to confirm the value of the AD7175-8 ID Register value. In the AD7175-8 datasheet, the 16 bit ID is listed as "0x3CDx". There is no mention to what the lowest four bits should be represented by "x". I suspect these may change based on the silicon revision, but can you please confirm if this is the case as it is not clear in the datasheet?
Furthermore, when checking the ID register, would it be best to mask out the lowest four bits and just confirm the most significant 12 bits as 0x3CD?