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LMK04821: Power supply ripple

William Wyatt-Millington
Prodigy 30 points
Part Number: LMK04821

Tool/software:

Is there a ripple specification for the power supplies?

  • 0
    TI__Intellectual 3000 points

    Hi William,

    I am working towards answering your question, but the lab work required will take me a bit of time. I will have an answer for you by the end of the week.

    Thanks,

    Michael

  • 0
    TI__Intellectual 3000 points

    Hi William,

    There is no ripple specification that has been measured for this device. The LMK0482x line features internal capacitance which, if paired with decoupling capacitors and the other power supply recommendations featured in the data sheet, can provide sufficient voltage stabilization. 

    If there is still concern regarding ripple, I would invite you to take a look at the user guide for the LMK04828EVM (LMK04826/28 User’s Guide (Rev. B) (ti.com)), which features schematics for the power supply. The EVM comes with a built-in LDO, which - when paired with decoupling capacitors - will completely reduce the effects of any introduced ripple. Hope this helps. 

    Thanks,

    Michael