Sensors / Detectors / Transducers
Direction Detection Sensor features diagnostic output.
Press Release Summary:
Targeted at automotive market, Hall-Effect Sensor IC and magnet combination provides solution for digital gear-tooth sensing and true zero-speed direction detection in 2-wire applications. It consists of single-shot molded plastic package with samarium cobalt magnet, pole piece, and single-chip Hall-Effect IC. Integrating 3 Hall elements and signal processing circuitry, sensor switches in response to magnetic signals created by ferrous gear teeth.Original Press Release:
Allegro Microsystems, Inc. Launches a New Two-Wire, Direction Detection Gear-Tooth Sensor with Diagnostic Output
Accurate and Repeatable Switching Over Temperature with Wide Operating Air Gap
Worcester, MA - June 8, 2004 - MicroSystems, Inc. announces a new optimized Hall-effect sensor integrated circuit and magnet combination that provides a user-friendly solution for digital gear-tooth sensing and true zero-speed direction-detection in two-wire applications. The sensor consists of a single-shot molded plastic package that includes a samarium cobalt magnet, a pole piece, and a Hall-effect IC that has been optimized to the magnetic circuit. This small package can be easily assembled and used in conjunction with a wide variety of gear shapes and sizes. The sensor is ideal for obtaining speed, direction and diagnostic information using gear-tooth-based targets found in ABS and transmission applications.
The Hall-effect sensor is a single chip solution that integrates three highly sensitive Hall elements and precise signal processing circuitry and switches in response to magnetic signals created by ferrous gear teeth. The circuitry contains a sophisticated digital circuit to minimize the effects of magnet and system offsets and to achieve optimal, true zero-speed operation. Signal optimization occurs each time the sensor is re-powered. Internal circuitry maintains signal optimization and encodes diagnostic information in the output signal of the sensor.
The regulated current output is configured for two-wire operation with direction and diagnostic capabilities incorporated into the speed signal. Targeted at the automotive market, Allegro's newest sensor is priced at $5.19 in quantities up to 1,000.
Allegro MicroSystems, Inc. is a supplier of advanced mixed-signal power semiconductors and Hall-effect sensors targeted toward the automotive, communications, computer/office automation, consumer and industrial markets. It maintains a leadership position in the integrated magnetic sensor and integrated motor driver product segments. With over 2,000 employees, Allegro is headquartered in Worcester, MA. Further information about Allegro, as well as free samples on our products, can be found at www.allegromicro.com.
