Magnet Specification AS5000-MA075H-1 1. General Description The AS5000-MA075H-1 is an axial magnet used with the AS5510 linear magnetic position sensor, in order to measure small linear displacements. The magnet is mounted on the top of the AS5510. The typical arrangement is shown in Figure 1. Material: NdFeB sintered magnet, Ni-coated 2. Dimensional Specification (mm) d=0.75 Dimensions in millimeters Surface finish: 1.6µm 1.50 3. Magnetic Specification Type Min. Material NdFeB - Property Grade N45SH - Remanence Br 13.2 13.8 KG Coercive Force bHc 12.6 - KOe Intrinsic Coercive Force iHc 20 - KOe Max Energy Product (BH) max. 43 46 MGOe Working Temperature - 150 °C www.ams.com Revision 1.1 / 02/04/13 Max. Unit page 1/4 4. Magnetic Field Representation Below in Figure 1:Figure 1, an illustration of the magnet and the AS5510 is shown. The curve plot below the sensor chip shows the ideal linear range of the magnet seen by the AS5510. Figure 1: Linear Position Sensor AS5510 + Magnet S N AS5510 0.295mm 0.295mm Magnetic field (mT) measured on AS5510 surface with 0.285mm airgap 10-bit result, output register AS5510 12.5mT 1023 Lin -Xmax ea rr 511 0 an ge +Xmax X (Magnet position) -12.5mT 0 Example: The airgap for the example shown below is 0.285mm typ. The sensitivity setting of the AS5510 for this example is +/- 12.5mT with a Non Linearity Error of < 2 % (for +/- 150µm stroke). The 10-bit output register D[9..0] OUTPUT = Field(mT) * (511/12.5) + 511 Max. Travel Distance TDmax = ±0.295mm (Xmax = 0.295mm) Bmax = 12.5mT X = -0.295mm (= -Xmax) Field(mT) = -12.5mT OUTPUT = 0 X = 0mm Field(mT) = 0mT OUTPUT = 511 X = +0.295mm (= +Xmax) Field(mT) = +12.5mT OUTPUT = 1023 Dynamic range of OUTPUT over ±0.295mm: DELTA = 1023 – 0 = 1023 LSB Resolution = TDmax / DELTA = 0.59mm / 1024 = 0.58µm/LSB www.ams.com Revision 1.1 / 02/04/13 page 2/4 In order to keep the best resolution of the system, it is recommended to adapt the sensitivity as close as the Bmax of the magnet, with Bmax < Sensitivity to avoid the saturation of the output value. If a magnet holder is used, this one ferromagnetic in order to keep the maximum magnetic field strength and maximum linearity. Materials as brass, copper, aluminium, stainless steel are the best choices to make this part. 5. Magnet Supplier Information The magnet supplier for this magnet is New Favor Industry Co., LTD. Taiwan. Additional information is available online and the contact information is listed in the following. New Favor Industry Co., LTD. Taiwan TEL: +886-2-2577-5038 Overseas customer: [email protected] Customer located in Taiwan: [email protected] http://www.newfavor.com www.ams.com Revision 1.1 / 02/04/13 page 3/4 Copyrights Copyright © 2013, ams AG, Schloss Premstaetten, 8141 Unterpremstaetten, Austria-Europe. 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. All products and companies mentioned are trademarks or registered trademarks of their respective companies. Disclaimer Devices sold by ams AG are covered by the warranty and patent indemnification provisions appearing in its Term of Sale. ams AG 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. ams AG 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 ams AG for current information. This product is intended for use in normal commercial applications. Applications requiring extended temperature range, unusual environmental requirements, or high reliability applications, such as military, medical life-support or life-sustaining equipment are specifically not recommended without additional processing by ams AG for each application. The information furnished here by ams AG is believed to be correct and accurate. However, ams AG 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 ams AG rendering of technical or other services. Contact Information Headquarters ams AG A-8141 Schloss Premstaetten, Austria Tel: +43 3136 500 32110 Email: [email protected] For Sales Offices, Distributors and Representatives, please visit: http://www.ams.com/contact www.ams.com Revision 1.1 / 02/04/13 page 4/4