• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 21 subscribers
  • Views 272 views
  • Users 0 members are here
Support feedback
Options
Options
Related

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.

LMX2594: multi-device SYNC

new2day
Expert 1950 points
Part Number: LMX2594
Other Parts Discussed in Thread: LMK04832, LMX2572

Tool/software:

There are 2 or 3 LMX2594 on the board. Their OSCin (100MHz) and SYNC (2.5MHz) are all from LMK04832, which are well aligned (LKM04832 are synchronized).  

I like to get all LMX2594 outputs at either at 312.5MHz or 5GHz with VCO = 10GHz by using SYNC pin to get phase aligned (SYNCed) of all outputs.  

I tried to enable the VCO_PHASE_SYNC = '1' as stated in the datasheet for 312.5MHZ outputs. However the PreR has to be 2 so that Fpd = 50MHz. See below left.  

However I like to have higher Fpd, such as 100MHz or 200MHz (by enabling doubler), the TISC shows error on the N divider. 

Any suggestions? Thank you.

 

  • 0
    TI__Guru** 108130 points

    Hi There,

    TICS Pro is correct. Because of the min. N divider restriction, we have to reduce fpd to make N-divide larger. 

    If your application only need 312.5MHz or 5GHz output, you can consider LMX2572, which can be drop-in replace LMX2594.