A1232

A1232 Ultra-Sensitive, Hall-Effect Speed and Direction Sensor with TPOS FEATURES AND BENEFITS AEC Q100 automotive qualified Senses speed and direction of ring magnets □□Two matched bipolar Hall-effect switches on a single substrate □□True Power-On State (TPOS): Recognizes hysteresis region at power-on Superior temperature stability Internal regulator for 3.3 to 24 V operation Symmetrical, high-sensitivity switchpoints Automotive grade □□Solid-state reliability □□Integrated ESD diodes □□Robust structures for EMC protection □□Short-circuit protected outputs □□Reverse battery protection □□–40°C to +150°C operating range Package: 8-pin TSSOP (suffix LE) Not to scale DESCRIPTION The A1232 is a highly sensitive, temperature-stable magnetic sensing device ideal for use in ring-magnet-based speed and direction systems in harsh automotive and industrial environments. It contains two bipolar, Hall-effect switches precisely arranged 1.63 mm apart. The switch outputs are thus in quadrature when interfaced with the proper ring magnet design. Internal logic processes the resulting digital signals to derive speed and direction information that is presented at the device’s outputs, OUTPUT A and OUTPUT B. The A1232 is designed for demanding, high-performance motor commutation applications. The Hall elements are photolithographically aligned to better than 1 μm. Accurately locating the two Hall elements eliminates a major manufacturing hurdle encountered in fine-pitch appli...