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MLX90333
Triaxis 3D-Joystick Position Sensor
3901090333
Page 9 of 38
Data Sheet
Rev. Preliminary
May 07
-400
-300
-200
-100
0
100
200
300
400
-90
-45
0
45
90
Alpha
α (Deg)
BX
BY
BZ
Figure 6 – Magnetic Flux Density –
β = 0 Deg – B
X ∝ sin(α), BY = 0 & BZ ∝ cos(α)
-400
-300
-200
-100
0
100
200
300
400
-90
-45
0
45
90
Beta
β (Deg)
BX
BY
BZ
Figure 7 – Magnetic Flux Density –
α = 0 Deg – B
X = 0, BY ∝ sin(β) & BZ ∝ cos(β)
Three (3) differential voltages corresponding to the three (3) components of the applied flux density are
provided to the ADC (Analog-to-Digital Converter – Figure 8 and Figure 9). The Hall signals are
processed through a fully differential analog chain featuring the classic offset cancellation technique (Hall
plate quadrature spinning and chopper-stabilized amplifier).
The amplitude of VZ is smaller than the other two (2) components VX and VY due to fact that the magnetic
gain of the IMC only affects the components parallel to the IC surface.
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