I am not sure about the CONFIGURATION WITHOUT THE SPI in page 23 of the
datasheet. Does the CSB need to be connected to ground?
The AD9626 CSB pin stands for “Chip Select Bar”, which means it is active LOW.
So to disable the SPI, they should connect it to AVDD. One caution, the
register default for address 0x14 is incorrect. The device will power up with
device in interleaved mode. The data sheet is being revised to the
following(see attachment).You must follow a write of 0x00 to register 14 with a
write of 0x01 to register FF (the device update register) to enable