TMAG5115: Polarization of hall sensor

Hello,

Thanks for considering to use Texas Instruments.  Are you looking for a device with two outputs? Essentially are you looking for a device that has one output high while the other is low?  If so, I think the DRV5032DU or DRV5032FD devices can do what you are looking for.

Hello Patrick,

  Thank you for suggestion, before looking for device we want to know what is exact difference between sensor having single polarization and having both polarization. while exploring we came across below below parameters which is creating confusion. 

1.North South polarization 

2.south polarizatio

3.North polarization 

please explain difference between above polarization.

Regards,

Sayali

Hello Sayali,

Can you cite the document and provide the sentence which you read north south polarization from? Polarity or polarization for our devices corresponds to how the magnet is oriented relative to the device sensing element.  Alternatively it would correspond to how the magnetic field is oriented relative to the sensing device. If the south pole magnet is facing our device like in the figure below, we would say the this is a south polarization.  For this we would expect the field component to be perpendicular to the device sensing element and the pcb the device sits on.  Depending on the device, the device may output low or high depending on the magnet pole facing the device.

Without further details, I presume north south polarization might look something like the following.

Hello Patrick,

     when we search any part on digikey there is parameter called polarization, e.g. Below is snapshot of TMAG5115B1CQDBZR_TI and SS561AT_Honeywell of digikey site , where for TI polarization mentioned is North South Pole and for Honeywell South Pole.

Regards,

Sayali

Hello Sayali,

The polarization on digikey appears to define whether the device responds to positive and negative fields (south or north).  If you look at the description section of the honeywell datasheet you will see that some variants only respond to a south field.  As the the SS561 variant is a latching device and not a unipolar device, I am not sure why they chose to categorize that as "south-pole".  Our device, TMAG5115, is also latch and in general our latches' outputs are one state for a sufficiently strong positive field, and another state for a sufficiently strong negative field.

Hello Patrick,

   Yes do agree, but its create confusion while selecting hall sensor. If we consider another variant of Texas Instrument i.e DRV5013ADEDBZJQ1, on digi key it shows south pole polarization. but in datasheet its for south output is low and north output is high

Regards,

Sayali                          mn h

Hello Sayali,

That is confusing, I am not sure why digikey did that, our latches respond to both north and south.  Will inform our marketing to see if we have any influence on how digikey categorizes the devices.  Do you need any further clarification for any information presented in our documentation or website?