Currently I'm running the AD5755 with nLDAC constantly tied to ground that leads to a single DAC channel update on rising edge of nSYNC with a minimum delay of 5 microseconds between two SPI transfers for DAC channel update (data sheet page 9, t19, digital slew rate control disabled).
Is it possible to use closer/faster SPI transfers (delay smaller than 5 microseconds) when using/toggling nLDAC for synchronous DAC channel update?