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LMX2594: how to get rid of spurious

Anand P
Prodigy 160 points

Part Number: LMX2594

Tool/software:

Hello,

I'm facing an issue i.e. getting more spurious at each frequency to which ever frequency I configure. for your reference I'm providing schematic also. please, give me a solution for this.

synthesizer_schematic.pdf

  • 0
    TI__Mastermind 23280 points

    Hello,

    The team is out for the holidays. Please expect a response by Jan 2 at the earliest.

    Thanks,

    Kadeem

  • 0
    TI__Mastermind 28031 points

    Anand,

    Spurs are a harsh reality of any PLL, but what you are showing looks higher than what I would typically expect.  One thing from the schematic is it seems that you are using a crystal.  Be aware that if the input frequency is low, then the slew rate tend to be low, and this can lead to increased spurs.  You might want to see if the input reference has anything to do with these spurs.

    Regards,

    Dean