mlx90333 Melexis Company, mlx90333 Datasheet - Page 22

• Manufacturer Part Number: mlx90333
• Description: Triaxis? 3d-joystick Position Sensor
• Manufacturer: Melexis Company

MLX90333
Tria ⊗ is ™ 3D-Joystick Position Sensor
14.3.2. Alpha/Beta Discontinuity Point (or Zero Degree Point)
The Discontinuity Point defines the zero point of the circle (Alpha or Beta). The discontinuity point places
the origin at any location of the trigonometric circle (see Figure 13).
For a Joystick Application, Melexis recommends to set the DP to zero.
14.3.3. LNR Parameters
The LNR parameters, together with the clamping values, fully define the relation (the transfer function)
between the digital angles (Alpha and Beta) and the output signals.
The shape of the MLX90333 transfer function from the digital angle values to the output voltages is
described by the drawing below (See Figure 11). Four segments can be programmed but the clamping
levels are necessarily flat (3-Points = 0).
C
100%
Clamping High
CLAMPHIGH
ALPHA_S1
B
ALPHA_Y
ALPHA_S0
A
Clamping Low
CLAMPLOW
0%
0°
Alpha
360°
ALPHA_X
Figure 11 - Digital Angle (Alpha) Transfer Characteristic (Idem ditto for Beta)
In the case of one single angle output (3-Points = 1), the shape of the MLX90333 transfer function from
the digital angle values to the output voltage is described by the drawing below (See Figure 12). Six
segments can be programmed but the clamping levels are necessarily flat.
3901090333
Page 22 of 43
Data Sheet
Rev. 001
Jan 08