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LMK04828 configuration

KGY
Intellectual 310 points

Other Parts Discussed in Thread: LMK04828, ADC12J4000EVM, ADC12J4000

I have some questions regarding the using of LMK04828 for ADC4J4000.

  1. LMK04828 registers need to program upon power up in numeric order from 0x000. Does the programming to setup the SYSREF comes after the power up programming?

  2. I understand that the SYSREF output to ADC is disabled. If deterministic latency is required for my design, what changes do I need to make to the configuration? Is the still SYNC_mode = X and SYSref_mux = 3? When do I disable SYSREF to avoid coupling into the ADC signal?

  3. How do I use SYNC pin? Do I asserted and hold SYNC until the SYSREF is done, then I release SYNC?

    Thank you.

  • 0
    Intellectual 310 points

    Hi,

    there is a mistake in the ADC part number. The ADC should be ADC12J4000 running at 4GSPS. What changes do I have to make to LMK04828 configuration file (LMK04828_DB1_Fs_3500Msps.cfg) for the ADC12J4000EVM board to achieve deterministic latency?

    Thanks.