A3422EKA-T Datasheet PDF - Allegro MicroSystems

The A3422xKA Hall-effect, direction-detection sensor is a new generation of special-function integrated sensors that is capable of sensing the direction of rotation of a ring magnet. This transducer provides separate digital outputs that provide in for ma tion on magnet rotation speed, direction, and magnet pole count. This device eliminates the major manufacturing hurdles encountered in fine-pitch direction-detection ap pli ca tions, namely maintaining accurate mechanical location between the two active Hall elements. Here, the two Hall elements are photo-lithographically aligned to better than 1 μm, as contrasted with 100 μm or worse mechanical location tol er ance when manufactured discretely. This highly sensitive, tem per a ture-stable, magnetic transducer is ideal for use in digital-encoder systems in the harsh environments of automotive or industrial applications. The A3422xKA is a high-sensitivity device op ti mized for use with high-density magnets.
   
FEATURES
• Internal Direction-Decoding Circuitry
• Two Matched Hall Bipolar Switches on a Single Substrate
• Superior Temperature Stability
• 4.5 V to 18 V Operation
    Electrically Defined Power-On State
    Undervoltage Lockout