AS5030 datasheet(36/44 Pages) AMSCO

36 / 44 page

www.ams.com/AS5030

Revision 2.4

36 - 44

AS5030

Datasheet - Application In formatio n

Sensitivity Trimming. As the curves for the 4 samples in Figure 30 show, the AGC value will not show exactly the same value at a given

airgap on each part. For example, at 1mm vertical distance, the AGC may read a value between ~11 ~ 24. This is because for normal operation

an exact trimming is not required since the AGC is part of a closed loop system.

However, the AS5030 offers an optional user trimming in the OTP to allow an even tighter AGC tolerance for applications where the information

about magnetic field strength is also utilized, e.g. for rotate-and-push types of knobs, etc.

8.9

Choosing the Proper Magnet

Figure 31. Vertical Magnetic Fields of a Rotating Magnet

Note:

There is no strict requirement on the type or shape of the magnet to be used with the AS5030. It can be cylindrical as well as square in

shape. The key parameter is that the vertical magnetic field Bz, measured at a radius of 1mm from the rotation axis is sinusoidal with a

peak amplitude of 20 ~ 80mT.

Magnet axis

Vertical field

component

(20…80mT)

360

Vertical field

component

R1 concentric circle;

radius 1.0 mm

Magnet axis

typ. 6mm diameter

AS5030 Arkusz danych(PDF) 36 Page - ams AG