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TMS320F28386S: Internal temperature sensor accuracy

Jordan Zhou
Genius 9340 points
Part Number: TMS320F28386S

Hi, 

The internal temperature sensor accuracy is +/-15C. Is there any way to improve, to +/-8C?

Thanks a lot.

Br, Jordan

  • 0
    TI__Guru 60865 points

    Hi Jordan,

    The sensor + ADC is linear to about +/-1 deg. C, so doing a 2-point temperature trim over the range of interest in the customer's manufacturing flow could result in a tighter accuracy (conceptually this is very straightforward, but executing this in an accurate and economical fashion is very challenging).

    From a practical perspective, if the customer's actual operating temperature range doesn't include very cold temperatures, the typical accuracy will be better than +/-15 C (worst case accuracy is at -40 deg. C).      

  • 0 in reply to Devin Cottier
    TI__Genius 9340 points

    Hi Cottier, 

    Do we have the data for "the typical accuracy will be better than +/-15 C"?

    If yes, customer can decide if trim is required.

    Thanks a lot.

    Br, Jordan

  • 0 in reply to Jordan Zhou
    TI__Guru 60865 points

    Hi Jordan,

    Unfortunately we don't have data of sufficient quality to publish to the customer on this topic