We've designed DAC8775 chip based DAC board for PLC analog output application.
I've doubts about working steps of DAC8775 w.r.to Internal Buckboost converter.
Hardware design has two option as of now
1. DC-DC External supply to Positive (Vpos) and negative voltage (Vneg) to DAC8775.
2. DC Supply to power up DAC8775 positive voltage (VPOS) and Internal buck boost converter to supply Negative voltage(Vneg)
In above two cases Config BB register's PNSEL bits will be 00 and 01.
In either of the case the working steps of the DAC8775 is the same or else do I need to change something in the sequence?
Reset DAC (Reg Id - 0x01)
Select BB (Reg Id - 0x06)
Config BB (Reg Id - 0x07)
Select DAC (Reg Id - 0x03)
Config DAC (Reg Id - 0x04)
DAC Data write (Reg Id - 0x05)
Regards,
Naveen