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AS5013

Datasheet - Detailed Descr i p ti on

7.2 XY Coordinates Interpretation

The movement of the magnet over the Hall elements causes response which is geometrically distributed like a bell-shaped curve.

The maximum magnet travel is a circle of 2mm radius around the center of the AS5013. The hall elements C1..C4 are placed on a circle

centered on the middle of the package. The hall element C5, placed exactly in the middle is used for better linearity response with magnet

displacement larger than ±1.0mm.

Figure 5. Hall Element Placement and Magnetic Field when the Magnet is Centered over each Hall Element

7.3 Transfer Function

AS5013 has the possibility to adjust the transfer function for the used magnet and a specific range to optimize the linearity and resolution. The

value will be provided from ams AG and has to be written in the algorithm related registers M_ctrl [0x2B], J_ctrl [0x2C], T_ctrl [0x2D] during the

initialization phase.

Please contact ams for parameter settings.

Below is the optimal setup for a range of ±0.6 mm to obtain the best dynamic range from XY registers -128~+127 with one given magnet airgap,

with d2x0.8mm axial magnet.

Figure 6. Example of Transfer Function Y_displacement vs. Y_register, Optimized for 0.6mm Travel Radius

dy @ movement in y direction at constant x

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dy @ movement in x direction at constant y

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mechanical y [um]

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