Q: Customer is using MAX5214, the schematic looks correct, but there is on output. What is the reason?
Below is the schematic
Below is the waveform:
A: According to schematic, it looks there is no big problem. The only concern is the output capacitance is too high. But it is not the root cause for no output. Verified all connection are correct and Vref is 2.5V.
Check the waveform, according to P12 of MAX5214 datasheet, it requires D15: D14 set to 0:1 when write through. But from waveform above, D15:D14 are set to 0:0 which is No Operation for the chip.
After changing it to 0:1, the output becomes normal.