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LMK04828: SYNC/SYSREF_REQ

ikon
Genius 5355 points
Part Number: LMK04828
Other Parts Discussed in Thread: DAC38J84

Hi Support,

For the pin 6, SYNC/SYSREF_REQ, where do I route to? Is it to FPGA for control?

Is this SYNC has to be tied together with the SYNC going to DAC38J84?

Need 2 LMK on boards as have more than 15 DACs to control. Can I tied the SYNC of these 2 LMK together?

Thanks.

  • 0
    TI__Expert 8865 points
    Hi Ikon,

    SYNC/SYSREF_REQ Pin is used for synchronizing the output dividers requesting the SYSREF outputs. Please refer to the datasheet page 36 "9.3 Feature Description 9.3.1 -> SYNC/SYSREF" for for the details on how to configure and use the pin.
    You can tie the syncs of the low LMKs togather if the driver stage driving the SYNC can drive.

    Best regards
    Puneet