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LMK05028: How much the frequency stability can be achieved by 2-Loop REF-DPLL Mode?

Hideki Hayashi1
Expert 7940 points
Part Number: LMK05028

Hi team,

When using 2-Loop REF-DPLL Mode without TCXO, how much frequency stability can be achieved? Customer hopes +/-15 ppm.

What other parameters does affect frequency stability in LMK05028?

Best regards,

Hideki

  • +1
    TI__Mastermind 20900 points

    Hideki-san,

    if the DPLL is locked to the reference, the accuracy is determined by the input.

    If the DPLL is in hold over or free running, the XO will be the limiting factor. In order to achieve +/- 15ppm the XO need to be equal or better then this.

    Regards,

    Julian