3D magnetic sensor from Infineon

Infineon will have engineering samples of a 3D magnetic sensor in July.

Called TLV493D-A1B6 performs magnetic field detection in x, y, and z direction allowing the sensor to measure 3D linear and rotation movements. The digital I²C interface enables bidirectional communication between sensor and microcontroller.3D magnetic sensor from InfineonThe sensor is for consumer and industrial applications that require 3D measurements or angular measurements or low power consumption, such as joysticks; control elements used for white goods and multi-function knobs; and electric meters where the 3D magnetic sensor helps to protect against tampering.

“Our TLV493D-A1B6 enables magnetic sensing to applications which have not been considered so far by making them smaller, more accurate and robust,” says Infineon’s Ralf Bornefeld, “our TLV493D-A1B6 marks the starting point for a new 3D magnetic sensor family. Later this year, we will offer a 3D sensor for automotive applications such as gear sticks and steering column controls.”

Today, up to three magnetic sensors – one for each dimension of external magnetic field – are needed to measure tampering attempts with large magnets. In future, the 3D magnetic sensor TLV493D-A1B6 replaces all three dimension sensors thus making e-meters smaller and more energy efficient.

The 3D sensor TLV493D-A1B6 detects all three dimensions of a magnetic field. Using lateral hall plates for the z direction and vertical Hall plates for the x and y direction of the magnetic field, the sensor can be used in a large magnetic field range of +/- 150mT (milli Tesla) for all three dimensions. This allows measuring and covering a long magnet movement. The large operation scale also makes the magnet circuit design easy, robust and flexible.

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The TLV493D-A1B6 provides 12-bit data resolution for each measurement direction. This allows a high data resolution of 0.098mT per bit (LSB) so that even the smallest magnet movements can be measured.


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