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TMAG5170-Q1: Temperature threshold setting with LSB corrosponds 4.26°C

Elmar Werkmeister
Prodigy 10 points
Part Number: TMAG5170-Q1

Hello together,  

I try to understand how the Temperature Threshold of 4.267°C per LSB  is calculated  in Chapter 7.6.1.8. 

Is this value correct given in Datasheet Table 7-13.

****

T_HI_THRESHOLD  67h Temperature maximum threshold.

User input as 2's complement 8- bit binary number.

Each LSB in this field corresponds to 4.267°C.

Default value of 67h represents 172°C.

T_LO_THRESHOLD R/W 32h Temperature minimum threshold.

User input as 2's complement 8- bit binary number.

Each LSB in this field corresponds to 4.267°C. Default value of 32h represents -53°C.

  • 0
    TI__Genius 15220 points

    Elmar,

    Thank you for reaching out with this question.  I have forwarded your concern on to the datasheet author.

    To calculate the 8 bit digital code for you threshold settings, please use the following formula to set your values:

    Digital Code = ((Threshold temp - 25 C) * 256/65 +1094)/16

    Based on this method, 172 C should result in a hex code of 0x69, and -53C should result with 0x31

    Thanks,

    Scott