MLX90333 Triaxis™ 3D-Joystick Position Sensor
The MLX90333 is a monolithic sensor IC featuring the Triaxis™ Hall technology. Conventional planar Hall technology is only sensitive to the flux density applied orthogonally to the IC surface. The Triaxis™ Hall sensor is also sensitive to the flux density applied parallel to the IC surface. This is obtained through an Integrated Magneto-Concentrator (IMC) which is deposited on the CMOS die (as an additional back-end step).
The MLX90333 is sensitive to the 3 components of the flux density applied to the IC (BX, BY and BZ). This allows the MLX90333 to sense any magnet moving in its surrounding and it enables the design of a novel generation of non-contacting joystick position sensors which are often required for both automotive and industrial applications (e.g. man-machine interface).
Furthermore, the capability of measuring BX, BY and BZ allows the MLX90333 to be considered as universal non-contacting position sensor i.e. not limited to joystick applications. For instance, a linear travel can be sensed with the MLX90333 once included in a specific magnetic design.
In combination with the appropriate signal processing, the magnetic flux density of a small magnet (axial magnetization) moving above the IC can be measured in a non-contacting way. The two (2) angular information are computed from the three (3) vector components of the flux density (i.e. BX, BY and BZ). The MLX90333 reports two (2) linear output signals. The output formats are selectable between Analog, PWM and Serial Protocol.