AS5045-ASST datasheet(29/47 Pages) AMSCO

Part #	AS5045-ASST

Description	12-Bit Programmable Magnetic Rotary Position Sensor

PDF	47 Pages

Scroll/Zoom	100%

Manufacturer	AMSCO [ams AG]

Direct Link	http://www.ams.com

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29 / 47 page

ams Datasheet

Page 29

[v2-01] 2017-Jul-13

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AS5045 − Detailed Description

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

to ±75mT (peak).

The magnet’s field strength should be verified using a

gauss-meter. The magnetic field Bv at a given distance, along a

concentric circle with a radius of 1.1mm (R1), should be in the

range of ±45mT to ±75mT (see Figure 30).

Figure 30:

Typical Magnet (6x3mm) and Magnetic Field Distribution

Magnet axis

Vertical field

component

R1 concentric circle;

radius 1.1mm

Magnet axis

typ. 6mm diameter

Vertical field

component

(45…75mT)

360

AS5045-ASST Datasheet(PDF) 29 Page - ams AG