Hi,
I have reported from a customer using AD8139 that DAC latency which is defined from digital input to analog output is observed normally fixed time, by using 4 FIFO depth through SPI, however sometime it increase 80ns(equivalent to x8 data clock) more, without any other problem symptom. FIFO Level Readback Register always indicates 4 when read.
Amount of the delay is always 80ns, never be intermediate values.
Can you figure out reason of the delay, or any comments what should we check for ?
Best Regards,