MLX90333KGO MELEXIS [Melexis Microelectronic Systems], MLX90333KGO Datasheet - Page 8
MLX90333KGO
Manufacturer Part Number
MLX90333KGO
Description
Triaxis 3D-Joystick Position Sensor
Manufacturer
MELEXIS [Melexis Microelectronic Systems]
Datasheet
1.MLX90333KGO.pdf
(38 pages)
- Current page: 8 of 38
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In summary, along X-axis, the left Hall plate measures “B
- B
“-B
Through an appropriate signal processing, the Tria⊗is™ sensor front-end reports the three (3)
components of the applied magnetic flux density B i.e. B
Indeed, by subtracting the signals from the two (2) Hall plates in each pair, the components B
are measured while B
each pair, the component B
In a joystick based on a “gimbal” mechanism as shown on Figure 3 (left), the magnet (axial magnetization)
moves on a hemisphere centered at the IC. The flux density is described through the following
relationships:
Those components are plotted on the Figure 5, Figure 6 and Figure 7.
3901090333
Rev. Preliminary
Z
Y⊥
”. Similarly, along the Y-axis, the left Hall plate measures “B
- B
Z
”.
Z
is cancelled. To the contrary, by adding the signals from the two (2) Hall plates in
Z
is measured while B
Figure 5 – Magnetic Flux Density – B
B
B
B
Y
Z
X
=
=
=
COS
COS
SIN
X⊥
Page 8 of 38
(
(
(
α
and B
Triaxis 3D-Joystick Position Sensor
α
α
)
)
)
⋅
⋅
⋅
X
COS
SIN
COS
, B
X⊥
Y⊥
Y
- B
are cancelled
(
(
and B
β
(
β
β
Z
Y⊥
)
” while the right Hall plate measures “-B
)
)
- B
X
Z
, B
.
Z
” while the right Hall plate measures
Y
, B
Z
MLX90333
Data Sheet
X⊥
and B
May 07
X⊥
Y⊥
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