A few ADF4xxx USB adapter boards may have the incorrect Product ID (PID) programmed into their EEPROM. This will result in the host computer not recognizing the USB device, and/or the evaluation software not connecting with the evaluation board.
There are 2 files attached.
'Fixing USB adapter board EEPROM.pdf' is a guide to diagnosing and fixing the problem.
'ADI_EEPROM_Fix.zip' contains the necessary files to complete re-programming.
RE: PLL USB adapter board not connecting/programming by rbrennan:
You might need to install this for step 16: ftp://ftp.analog.com/pub/evalcd/USB_Adapter_Board_Installer/USB_Adapter_Board_Installer.zip