Unfortunately，Because of this error，I bought the wrong board or controller board.My boss is very angry,I can't continue my research.I hope you can correct them sincerely.
So I'd like to return the boards,And what should I do to return the boards?
Then I also need to find the D/A converter the update rate of is above 2.5Msps and the resolution of which is above 16 bits. Could you give me some advice?
Is the 2.5 MSPS requirement per channel (10 MSPS for 4 channels) or for all channels (4) already?
We have some DACs that which can have this update rate but that would be for all channels already, so a 2.5 MSPS DAC for 4 channels will result to a ~625kSPS per channel. The workaround would be to use four different single channel DACs but this would also mean four SPIs.
Second alternative is to use parallel interface, however we do not have a 16-bit, 4 channel DAC as of this moment.