AS5045

Data Sheet

www.austriamicrosystems.com

Revision 1.7

23 – 33

14 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).

a concentric circle with a radius of 1.1mm (R1), should be in the range of ±45mT…±75mT (see Figure 17).

Figure 17. Typical Magnet (6x3mm) and Magnetic Field Distribution

N

S

Magnet axis

Vertical field

component

R1 concentric circle;

radius 1.1mm

R1

Magnet axis

typ. 6mm diameter

S

N

Vertical field

component

(45…75mT)

0

360

Bv