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MSP430FR5849: DCO Error

DDdoor
Expert 2435 points

Part Number: MSP430FR5849

Hello,

When I check the electrical characteristics of the DCO in the data sheet,
I see that the DCO error is ±3.5% @ 1MHz.
Is this fixed for each individual device?
For example, ±1% for device A, ±2% for device B, and so on.

Or is there a DCO error per clock?

Or is this DCO error determined at each power supply startup?

Best regards,
DDdoor

  • 0
    TI__Mastermind 23745 points

    Hi DDdoor

    DCO error is ±3.5% @ 1MHz is fixed (at steady-state) for each individual device at the full temperature range (-40~85C)

    This DCO frequency has been trimmed at factory per device.

    Thanks!

  • 0 in reply to Xiaodong LI
    Expert 2435 points

    Hello Xiaodong LI,

    Thanks for the reply.
    One more thing related to errors, please tell me about temperature drift.

    Is the DCO temperature drift "0.01%/°C" applied to the frequency including error?
    (e.g., if the DCO error at 1 MHz is +1% and there is a DCO temperature drift of 10°C, then 1.01*99.9%~1.01*100.1%MHz)

    Best regards,
    DDdoor

  • 0 in reply to DDdoor
    TI__Mastermind 23745 points

    Hi DDdoor

    On DS, DCO temperature drift is 0.01%/ºC.

    Your understand is correct. the DCO temperature drift "0.01%/°C" is applied to the frequency including error

    DCO error is ±3.5% @ 1MHz at the full temperature range (-40~85C) is specificed.

    Thanks!

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