AS5304 Magnet Specification

2013-Sep [1-00]

page 4/7

3

Locating the Hall Sensor Array

The measurement radius should coincide with the Hall sensor array on the chip. The location of the

Hall sensors can be seen in Figure 3. The Hall sensor array is located 1.02mm above the horizontal

centerline of the TSSOP-20 package, or

3.20mm + 1.02mm = 4.22mm above the edge of pins #1….10 (top view, pin#1 at bottom left).

Figure 3

Location of Hall sensors in the TSSOP-20 package

0.2299±0.100

0.2341±0.100

Package

Outline

3.0475±0.235

Die C/L

0.7701±0.150

4

Dimensional Specification

Magnet Order # AS5000-MR20-44 on ams web shop www.ams.com/ICdirect

Parameter

Sym

bol

Min

Typ

Max

Unit

Note

Magnet material

Plastic bonded Strontium Ferrite

SrFe. Supplier-internal material

grade = BMNP-1612.

Remanence

Br

280

300

mT

Pole length

2.0

mm

Suited for AS5304

Number of poles

44

Inner ring radius

11.975

12

12.025

mm

Resolution

Res

3520

step

s/rev

With AS5304 @ 160x

interpolation

11.78

bit

880

ppr

Measurement

radius

14.00

mm

Pole length* number of poles / 2π

Outer ring radius

15.975

16

16.025

mm