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CC1352P: Would this part be clockable by MEMS devices

marbol
Prodigy 10 points
Part Number: CC1352P


I'd like to know if this part is compatible with the crystals being replaced with a 2 output MEMS device? What drive strengths should be used if so? And what gotchas would there be?

  • 0
    TI__Guru**** 317180 points
    Could you give some more details about the spec in the MEMS device?
  • 0 in reply to TER
    Prodigy 60 points

    Either a DSC612, 2 output mems clock generator or DSC60XXB parts.
    I'm wondering about drive strength. The 612 part has spread spectrum and supposedly programmable drive strength, but consumes more power.

  • 0 in reply to markb
    TI__Guru**** 317180 points
    At the moment we have only tested CC1352P with a xtal. We will soon start looking into support for TCXOs. We have no plans to look at other clock sources. If the MEMS device have the same or better jitter etc as a TCXO you should be able to use MEMS.

    Out of curiosity, why do you want to use a MEMS based device? As far as I can see DSC612 gives 20 ppm frequency stability with is not any better than a xtal and give a higher current consumption.
  • 0 in reply to TER
    Prodigy 60 points
    I think the power consumption is getting to be about on par. But the mems part that provides 2 clock signals would allow me to replace both crystals with one part.

    But the MTBF lifetime of a mems part seems to be much longer than a crystal. And EMI sensitivity is less. I'm not sure what all the advantages that some of the other manufacturers state are marketing fluff and what are true, but I want to find out. It seems mems are getting better all the time and crystals are just crystals.

    The power consumption of the DSC60XX parts seem to be much less than the dsc612, but then again, if I can use the 612 to replace 2 crystals I'd like that. It might cut down on the number of caps too. In my design the board space is going to be important. I'll probably try it out and see what happens.