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MSP430FR5969-SP: DCO Characteristics

Nathan Graves
Prodigy 60 points
Part Number: MSP430FR5969-SP


Hello,

I've been looking at the datasheet performance of the FR5969-SP DCO to determine if it will be suitable as a source for MCLK/SMCLK in my application or if I will need an external crystal.

I have been unable to locate any radiation testing information related to the frequency stability or jitter of the DCO. Is this something that was tested during the TID testing of the device?

Also, I see that the -SP version has ±3.8% frequency range specified for the DCO, while the the non-SP version has ±3.5% specified. Is a slightly greater range specified to account for environmental effects or is there something different about the DCO on the -SP version? Is temperature drift an additional effect or included in the specified frequency range?

Regards,

Nathan

  • 0
    TI__Mastermind 29105 points

    Hey Nathan,

    I'm not familiar with the radiation testing specific to DCO frequency, although I assume that it is usually running during most of the tests.  I'll ask and see if there is any more info I can get on radiation being a cause of concern on DCO stability.  

    As for the DCO max frequency deviation, this is stated above table 4-6 as being over voltage and temperature.  Because the MSP430FR5969-SP supports a larger temperature range, this is going to also slightly increase this max specification.  

    Thanks,

    JD

  • 0 in reply to JD Crutchfield
    Prodigy 60 points

    JD,

    It's good to know that it is running during the tests.

    I must have gone blind for a second while looking at Table 4-6 yesterday! Totally missed that statement. Thanks for pointing it out that clears things up.

    Regards,

    Nathan

  • 0 in reply to Nathan Graves
    TI__Mastermind 29105 points

    Hey Nathan,

    Glad that cleared up your main question.  I've sent a note asking for any additional information about DCO usage and will update this thread if I get any additional feedback.  

    Thanks,

    JD

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