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AM2431: accuracy of the MCU_RC_OSC_12M

futoshi kawarazaki
Prodigy 155 points
Part Number: AM2431

Tool/software:

Please provide the accuracy of the MCU_RC_OSC_12M frequency.

This information is needed when using a Dual Clock Comparator.

  • 0
    TI__Guru 62855 points

    The internal RC oscillator is expected to oscillate in the frequency range of 11.25MHz to 13.81MHz.

    Regards,
    Paul

  • 0 in reply to peaves
    Prodigy 155 points

    Hi Paul

    I found in another forum that the "AM2431: Internal oscillator accuracy" is listed as ±10%.

    However, the response I received this time says -10% and +10.5%.

    Which one is correct?

    Regards,

    Futoshi

  • 0 in reply to futoshi kawarazaki
    TI__Guru 62855 points

    II suspect the document that says the limit is ±10% was simply rounded to the nearest whole number.

    The nominal frequency is 12.55MHz. The upper limit provided in my previous reply represents a variation of [(13.81MHz/12.55Mz) - 1] x 100 = 10.04%. The lower limit provided in my previous reply represents a variation of [(11.25MHz/12.55Mz) - 1] x 100 = -10.36%. The limits I provided are very close to ±10%.

    Regards,
    Paul