I'm using the AD5781 for the first time, programming is done by ATE (something like FPGA, but more flexible).
I'm not getting any vout, it's set to 0 constantly.
Below is my schematics, and the signals driven to the chip.
signals from top to bottom :
In addition - RESET is toggled from 0 to 1, and remains high, after which the sync goes low.
There are 24 clock when SYNC is low, first 3 bits are '001' for write operation to DAC register,
then 18 bits of data that were calculated to produce 3.3v output, and 2 bits '0' LSB.