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DRV5032: Why need two DRV5032 on TIDA-01066 TI design?

daniel
Genius 5095 points
Part Number: DRV5032

Hi Team,

According to the user guide, this TI Design uses one DRV5032FB digital Hall effect sensor to detect the primary magnet and a second DRV5032FB sensor to detect a tampering magnet.

What means primary magnet and tampering magnet?

We want to use DRV5032 for detecting window open/close. In this simple application, should we use two DRV5032? Or one is enough?

Thanks

  • 0
    TI__Genius 17990 points
    Hello Daniel,

    Thank you for using the TI forum.

    The primary magnet would be the magnet intentionally put into the system that lets you know if the window/door is open or closed.

    The tampering magnet is a magnet that someone introduces to the system to try to trick the sensor/system into saying the window/door is closed when it is actually open. The User's Guide says: "Because these sensors are used primarily in security applications, a feature is needed to detect so-called tampering magnets, which can be used to trick the sensor into thinking the door or window is closed. Configurations using multiple sensors can be used to detect tampering magnets."

    Because of this, I would recommend using two sensors so to that the system is more secure.