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A3423EK-T Datasheet(PDF) 8 Page - Allegro MicroSystems |
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A3423EK-T Datasheet(HTML) 8 Page - Allegro MicroSystems |
8 / 10 page Dual Channel Hall Effect Direction Detection Sensor IC A3423 7 Allegro MicroSystems, LLC 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com Application Information Operation with Fine-Pitch Ring Magnets . For targets with a cir- cular pitch of less than 4 mm, a performance improvement can be observed by rotating the front face of the device (see below). This rotation decreases the effective Hall element-to-element spacing, provided that the Hall elements are not rotated beyond the width of the target. Applications . It is strongly recommended that an external 0.01 μF bypass capacitor be connected (in close proximity to the device) between the supply and ground of the device to reduce both external noise and noise generated by the internal logic. The simplest form of magnet that will operate these devices is a ring magnet. Other methods of operation, such as linear magnets, are possible. Extensive applications information on magnets and Hall-effect sensor ICs is also available in the “Hall-Effect IC Applications Guide” which can be found in the latest issue of Application Note 27701, at www.allegromicro.com/techpub2/an/ an27701.pdf. E1 E2 E1 D E2 D cos Target Face Width, F F < D sin Target Circular Pitch, P Normal Coplanar Alignment Rotated Alignment Target Profile of Rotation NS S |
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