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LMK5B33216: Environmental spec for LMK5B33216

Youngho Suh
Intellectual 540 points
Part Number: LMK5B33216


Hi,

I will use LMK5B33216 for airborne applications which require shock, vibration temperature, and low-g robustness. My input is 1pps and will use an external 100MHz VCXO that meets the environmental specs it needed. I want to know if LMK5B33216 can also support shock, vibration temperature, and low-g robustness applications. Since it contains a built-in BAW oscillator, I want to check its robustness of it especially for low-g sensitivity. Can you please advise on it? If you have data or documents for them, please share this with me.

Thanks!

  • 0
    TI__Mastermind 18800 points

    Hi Youngho,

    We have paged a device expert to comment. BAW oscillators are supposed to be tolerant of shock and vibration compared to crystals but I am not sure how a BAW VCO would compare to a LC circuit VCO.

    Best,

    Evan Su

  • 0 in reply to Evan Su
    TI__Mastermind 18800 points

    Hi Youngho,

    I don't think we have specific test data for BAW VCOs vs LC VCOs, but in general our BAW products should be quite robust to environmental conditions. A pure LC circuit has some advantages in that its resonance isn't really dependent on the shape of a physical structure, so it would be running mostly fine unless a really strong shock or vibration event somehow knocked the inductors out of order, and at that point I would expect catastrophic damage to the rest of the system anyway. A BAW resonator will flex somewhat in response to vibration, but only on the order of angstroms, and it is much less sensitive than quartz crystals or MEMS resonators. So if your system can support quartz or MEMS systems anywhere, the BAW in the LMK5B33216 would be unlikely to have noticeable problems.

    I have paged our DPLL marketing expert in case he has anything else to add.

    Best,

    Evan Su

  • +1 in reply to Evan Su
    Intellectual 540 points

    Thanks for the information. I understood BAW VCOs will be robust over temperature and possibly shock & vib. Do you think it also supports low-g applications? Do you have relevant data for it?

  • 0 in reply to Youngho Suh
    TI__Mastermind 18800 points

    Hi Youngho,

    We don't have low-g data but it should be OK. Similar to the vibration situation, the resting state of the BAW resonator structure will deform a small amount in low-g compared to normal, but less than quartz and it is not likely to cause meaningful differences in performance.

    Best,

    Evan Su