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Revision 1.09

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AS5130

Data Sheet - A p p l i c a t i o n I n f o r m a t i o n

Figure 26. Vertical Magnetic Fields of a Rotating Magnet

Magnet Placement

Ideally, the center of the magnet, the diagonal center of the IC and the rotation axis of the magnet should be in one

vertical line. The lateral displacement of the magnet should be within +/-0.25mm from the IC package center or +/-

0.5mm from the IC center, including the placement of the chip within the IC package. The vertical distance should be

chosen such that the magnetic field on the die surface is within the specified limits. The typical distance “z” between

the magnet and the package surface is 0.5mm to 1.8mm with the recommended magnet (6mm x 2.5mm). Larger gaps

are possible, as long as the required magnetic field strength stays within the defined limits. A magnetic field outside the

specified range may still produce acceptable results, but with reduced accuracy. The out-of-range condition will be

N

S

Magnet axis

Vertical field

component

(20…80mT)

0

360

360

Bz

Vertical field

component

R1 concentric circle;

radius 1.0 mm

R1

Magnet axis

typ. 6mm diameter

S

N