Hi Darren,
I would like to do some diagnostics to the board. Please use 5.5V as your external supply and 3.3V as your external logic supply. Do not connect the SDP board.
Please use this link options. LK1 to LK6 respectively: B,B,NC(no connection),B,B,B .
Tell me what you observed specifically the values of the following:
- TP2
- All Vout of both DACs
- Pin1 of U7
- Pin1 of U5
Regards,
Mark