AS5245 AMSCO [austriamicrosystems AG], AS5245 Datasheet - Page 24

• Manufacturer Part Number: AS5245
• Manufacturer: AMSCO [austriamicrosystems AG]

AS5245
Data Sheet - A p p l i c a t i o n I n f o r m a t i o n
9.4 Choosing the Proper Magnet
Typically, the magnet should be 6mm in diameter and ≥ 2.5mm in height. Magnetic materials such as rare earth AlNiCo/SmCo5 or NdFeB are
recommended. The magnetic field strength perpendicular to the die surface has to be in the range of ±45mT…±75mT (peak).
The magnet’s field strength should be verified using a gauss-meter. The magnetic field B
radius of 1.1mm (R1), should be in the range of ±45mT…±75mT
Figure 16. Typical Magnet (6x3mm) and Magnetic Field Distribution
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Vertical field
component
Vertical field
component
Bv
0
360
N
(45…75mT)
(see Figure
Revision 1.3
R1
typ. 6mm diameter
16).
R1 concentric circle;
radius 1.1mm
S
Magnet axis
Magnet axis
v
at a given distance, along a concentric circle with a
360
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