MLX90316KDC-BDG Datasheet, PDF (9/45 Pages) Melexis Microelectronic Systems – Rotary Position Sensor IC

MLX90316
Rotary Position Sensor IC
Both components of the applied flux density B_// are measured individually i.e. B_X// and B_Y//. Two orthogonal
components (respectively B_X⊥ and B_Y⊥) proportional to the parallel components (respectively B_X// and B_Y//)
are induced through the IMC and can be measured by both respective pairs of conventional planar Hall
plates as those are sensitive to the flux density applied orthogonally to them and the IC surface.
While a magnet (diametrically magnetized) rotates above the IC as described on Figure 4, the sensing
stage provides two differential signals in quadrature (sine and cosine − Figure 6 and Figure 7)
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0
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-200
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90
180 270 360 450 540 630 720
Alpha (Degree)
BX
BY
Figure 6 – Magnetic Flux Density – B_X ∝ cos(α) & B_Y ∝ sin(α)
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0
-500
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180 270 360 450 540 630 720
Alpha (Degree)
VX
VY
Figure 7 – Tria⊗is® sensor front-end − Output signals − V_X ∝ B_X ∝ cos(α) & V_Y ∝ B_Y ∝ sin(α)
3901090316
Rev10
Page 9 of 45
Jul/13