we are using four DAC DAC5682Z in a our product. The DACs are all used without interpolation, only one channel on at 1 GSPS. DACCLK：250MHz, DATACLK:500MHz(hardware sync),After the initialization, sometimes the DACs start generating a signal with several spikes except the second one. When the spike occurs, a re-sync can recover the output. We tried a lot of ways to adjust it but it did not work.Can you give us some advice? Thank you!