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.

TMAG6180-Q1: What are merit/demerit for TMAG6181-Q1 and DRV5053-Q1?

Part Number: TMAG6180-Q1
Other Parts Discussed in Thread: DRV5053-Q1, TMAG6181-Q1, TMAG6180, DRV5053

Tool/software:

Hello experts,

Now I study posistion sensing portfolio which can be used for motor control.

I found TMAG6181-Q1 and DRV5053-Q1 are both magnetic devices, and TMAG6181-Q1 is AMR based whereas DRV5053-Q1 is hall based.

I believe we can use both devices for the replacement of resolver. Is it correct?

Then, what are merit/demerit for TMAG6181-Q1 and DRV5053-Q1?

Thanks,

Kento

  • Kento-san,

    AMR senses the angle of the magnetic field in the XY plane of the sensor.  Because of this, it is best situated on-axis with a rotating diametric magnet.  That is, the center of the sensor place on the axis of rotation for the spinning magnet.  AMR naturally produces two full output cycles per revolution, which normally would limit the accuracy to 180 degrees.  TMAG6180 integrates a 2D Hall-effect Latch to provide quadrant data and remove this uncertainty.  While AMR provides the lowest noise measurements and highest angle accuracy, it is not well suited for placement where the X and Y components of the magnetic field vector are not equal in amplitude. Unequal amplitudes represent an input non-linearity and this will produce an output non-linearity.

    More details can be found here: https://www.ti.com/lit/an/slya085/slya085.pdf

    DRV5053 is a 1D Hall-effect sensor.  For each revolution of the magnet, you should see one period of a sine wave.  You will need to place two of these exactly 90 degrees apart to produce both sine and cosine.  Sensitivity mismatch and mechanical errors can lead to amplitude mismatch which would need to be corrected before calculating angle.  This solution can have higher noise than TMAG6180, so the angle accuracy will likely not be quite as good.

    You can find an explanation how to use this device in this document: https://www.ti.com/lit/an/slya036b/slya036b.pdf

    Thanks,

    Scott