• State Resolved
  • Locked Locked
  • Replies 2 replies
  • Subscribers 20 subscribers
  • Views 319 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

LMX2571: Suggestions for Reducing Phase Noise

Kevin LaRosa
Genius 17380 points
Part Number: LMX2571

Hello,

I received the following question from a customer:  Are there any suggestions on how to reduce the phase noise in LMX2571?

  • 0
    TI__Mastermind 24205 points
    Hi Kevin,

    Can the customer provide device configuration details and/or end application details? Depending on what they are trying to do, there could be other devices with improved fractional PLL performance.

    Regards
    Arvind Sridhar
  • 0 in reply to Arvind Sridhar
    TI__Mastermind 27581 points
    Kevin,

    A few things to keep in mind:

    1. You can model the phase noise with the PLLatinum Sim tool
    2. If you use the programmable input multipler, it does degrade the PLL phaes noise
    3. The input reference needs to be clean, otherwise it's noise can dominate
    4. It is preferred to have a fast slew rate for the input reference.


    Regards,
    Dean