Honored Contributor
Honored ContributorI'm also working with ADS5263 just now. What kind of board do you use? I mean is it your custom board or evaluation? I had some problems with LVDS termination. I used 100 Ohms external resistors for LVDS differetial termination and noticed that AC amplitude between positive and negative lines on bit clock line is differente: 270 mV and 600 mV respectively. Furthermore when board's temperature went high, amplitudes went low and PLL unlocked on 40-50 C degrees. The sitaution becomes better after I soldered resitors out of the board and enabled on-chip differential terminator. And one more quastion about synchronization. Do you use PLL dynamic phase shift? If so what clock are you shift 800 MHz, 100 MHz (enable) or 100 MHz (data_latch)?
