• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 29 subscribers
  • Views 680 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

TMAG5273: Magnet Strength needed in Gauss for an accurate reading

Karen Barnard
Prodigy 10 points
Part Number: TMAG5273

Hello!  I am trying to figure out what magnet strength is needed to use the A1 sensor in its ±40 mT range (most sensitive range) in Gauss.  This would help me pick a magnet for our application.  

 

In the data sheet it says +/-40mT range, 820 LSB/mT.   So it can go down to 820mT?

So is the smallest magnetic field it can accurately pick up 820mT?

Thanks for the help!

  • 0
    TI__Mastermind 21060 points

    Karen,

    Welcome to E2E!  Thanks for reaching out with your question.

    • The conversion ration for Gauss to Tesla is : 1T = 10kG.  Or rather 1mT = 10G.
    • The LSB size of 820LSB/mT then means 1 LSB = 1.220uT.  In Gauss, 1 LSB = 12.195 uG.
    • The sensor is able to measure fields that range in strength from -400G to +400G.

    While the LSB size is 12.195 uG, there is noise in the measurement which will influence your minimum measurable field.

    The effective measurement noise will depend on some of the device settings, but you will need to consider this input noise as well.  

    Thanks,

    Scott