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MSP430FR5847: Accuracy of TLV Data

Takashi Hosokawa
Expert 1455 points
Part Number: MSP430FR5847

Hi All,

Please tell me about TLV Data of MSP430FR5847.

It is stated in Table 5-30 (2) on page 48 of the data sheet(slase34d) as 30℃ ± 3℃ and 85℃ ± 3℃.

Customer converts the built-in temperature sensor using 1.2 V built-in reference, then reads TLV Data and calculates it.

(It is calculated from Address 0x1A1A (30℃) and 0x1A1C (85℃))

When 200 prototypes were trial-produced, it was almost good, but two items with a large error (5 - 6 ° C) were found.

When comparing the TLV of the two and the other MCU, it is that it is greatly different.

Then please tell me the following contents.

1. Is this accuracy of ± 3℃ guaranteed?

2. Please tell me the extent to which the calibration value of the temperature sensor fluctuates.

3. Is there a possibility that the calibration data varies greatly?

Best Regards,

Takashi

  • 0
    TI__Expert 4695 points

    Hi Takashi,

    1. The production test equipment has the accuracy better then +-3C.

    2. This should be within the range of +-3C

    3. It depends on the actual temperature of the test equipment.

    What do you mean with "almost good"? Was the temperature difference 0C?

    Best regards

    Lukas

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