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TMAG5170: TMAG5170A1

Haibo Xu
Prodigy 130 points
Part Number: TMAG5170

Tool/software:

Dear Expert

 Linear magnetic range of Tmag5170A1 can be configured with 3 values.

What is the minimum detectable value when configured as ±100mT?


How to convert 326LSB/mT？

Thank you.

  • +1
    TI__Mastermind 21120 points

    Haibo,

    326 LSB/mT can be inverted to determine the individual LSB size. (3.067 uT / LSB).  This is calculated by taking the full scale output range and dividing by the number of bits.

    However, when taking these measurements it is important to understand that the single conversion from the ADC will be 12-bit, but that with oversampling the result is extended to a 16-bit code.  The oversampling will increase the SNR of your result, but even at the maximum averaging of 32x, the achievable ENOB (effective number of bits) is 14.5.  

    This is seen in the input referred noise specification:

    You will want to be sure that your input signal can be measured over the input referred noise for your averaging setting.

    Thanks,

    Scott