Revision 1.0 www.austriamicrosystems.com Page 1 of 2
General
This specification defines the dimensional and magnetic properties of a multi pole magnetic strip for use with the AS5304
magnetic linear motion and off-axis rotary angle encoder.
Material: rubber bonded Strontium Ferrite SrFe.
1 Dimensional Sp ecification
Magnet Order # MS20- 50 on austriamicrosystems web shop, refer to Figure 1
Parameter Symbol Min Typ Max Unit Note
Strip Wi dth W 100,84 101,6 102,36 mm 4.00” +/- 0.030”
Strip Cut Length S 4,62 5,0 5,38 mm 0.197” +/- 0.015”
Strip Thickness T 0, 762 0,762 0,813 mm 0.030” +0.0 0” / – 0.002”
Thermal expansion 49 x10-6/K Mechanical length expansion
Density 3,4 g/cm3 estim ated
Delivery 4,00” x 0.030” x 200’ Outdoor adhesive, cut thru .197”.
Minimu m 1 rolls (~ 12.000 strips).
2 Magnetic Input Specification
Magnet Order # MS20- 50 on austriamicrosystems web shop, refer to Figure 1
Parameter Symbol Min Typ Max Unit Note
Pole length Lp 2,00 mm
results in pole pair length of 4mm
(50 poles @ 2,0mm, 2 border poles
~1,0mm)
Resolution Res 25 µm With AS5304 @ maximum interpolation
Pole length deviation +/- 50 µm Measured at Bz=0, all poles (Lp) within
active r egion
Number of poles 50 poles Excluding poles with L<LP at the
ends
of the s trip
Magnetic field amplitude @
0.5mm distance Bpk 15 mT
Vertical component of the magnetic field
strength in the center of the strip at
25°C
Amplitude variation +/-1,5 mT All poles within active region
Active Region to strip edge A 0,5 mm estimated
First Bz=0 position to strip
edge D1 TBD 1,0 TBD mm Tolerance estimated +/-0,25µm
Last Bz=0 position to strip
edge D2 TBD 1,0 TBD mm Toleranc e estimated +/-0,25µm
Temperature range Tamb -18 25 80 °C
Temperat ure drift TkBr +0,2 %/K Magnetic field temp. drift
MAGNET SPECIFICATION
AS5304
Magnetic Multipole St rip, MS20-50
Pole Length 2.0 mm, 50 poles
AS53xx linear mu ltipole magnetic strip
Revision 1.0 www.austriamicrosystems.com Page 2 of 2
S
N
S
W
Lp
S NN SS NS
T
A
Bpk Bpk
N
D1 D2
A
S
1234 47484950
Figure 1
Contact
Headquarters
austriamicrosystems AG
A 8141 Schloss Premstätten, Austria
Phone: +43 3136 500 0 Fax: +43 3136 525 01
www.austriamicrosystems.com
Magnet Supplier Information
ARNOLD Magnetic Technologies
107 Indus try Road
Marietta, OH 45750
http://www.arnoldmagnetics.com/index.htm
Copyright
Devices sold by austriamicrosystems are covered by the warranty and patent indemnification provisions appearing in its Term of
Sale. austriamicrosystems makes no warranty, express, statutory, implied, or by description regarding the information set forth
herein or regarding the freedom of the described devices from patent infringement. austriamicrosystems reserves the right to
change specifications and prices at any time and without notice. Therefore, prior to designing this product into a system, it is
necessary to check with austriamicrosystems for current information. This product is intended for use in normal commercial
applications.
Copyright © 2008 austriamicrosystems. Trademarks registered ®. All rights reserved. The material herein may not be
reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. To the best of
its knowledge, austriamicrosystems asserts that the information contained in this publication is accurate and correct. However,
austriamicrosystems shall not be liable to recipient or any third party for any damages, including but not limited to personal
injury, property damage, loss of profits, loss of use, interruption of business or indirect, special, incidental or consequential
damages, of any kind, in connection with or arising out of the furnishing, performance or use of the technical data herein. No
obligation or liability to recipient or any third party shall arise or flow out of austriamicrosystems rendering of technical or other
services.
