Motion Sensors / Detectors / Transducers
Speed Sensor incorporates self-calibrating feature.
Press Release Summary:
Supplied in SE package, ATS673/4LSE Gear-Tooth Sensor is designed to operate with True Power-On State (TPOS) recognition. It incorporates single-element Hall-effect sensor as well as signal-processing circuitry that switches in response to changing magnetic signals created by rotating ferrous targets. Digital tracking of analog signal is used to set switching threshold of device. Sensor is targeted for industrial and automotive markets.
Original Press Release:
Allegro Microsystems, Inc. Introduces Self-Calibrating TPOS Gear-Tooth Sensor
ATS673 Optimized for Automotive Cam Sensing Applications
Worcester, MA, March 8, 2005 - Allegro MicroSystems, Inc. announces an innovative addition to its cutting-edge speed-sensing solutions, the ATS673/4LSE. These sensors are designed to operate with a True Power-On State (TPOS) recognition and include a self-calibrating feature in running mode that improves accuracy performance over a wide temperature and air-gap range. The unique packaging concept integrates the magnet and a monolithic silicon IC, which are carefully designed to provide optimal performance. Allegro's advanced quick calibration routine and signal processing make speed sensing easier and more reliable than ever before.
Allegro's ATS673/4LSE sensors incorporate a single-element Hall-effect sensor and signal-processing circuitry that switches in response to changing magnetic signals created by rotating ferrous targets. The TPOS feature of the sensor provides an accurate reading of the sensor's position in relation to the target upon power-up of the sensor. Digital tracking of the analog signal is used to set the switching threshold of the device. The resulting switchpoints are air-gap independent, greatly improving output accuracy and duty cycle. The device also uses an updated algorithm to fine-tune switchpoints in running mode, maintaining the device specifications even through large changes in air gap. Robust input and output EMC structures provide excellent immunity to transients and BSD pulses seen in typical automotive applications.
Allegro's newest sensor is targeted to meet the needs of industrial and automotive markets with end applications that include camshaft speed sensing, zero-speed gear-tooth sensing, and proximity sensing. Supplied in an "SE" package, the ATS673 will have a 28-week lead time to market, and is priced at $2.19/unit for quantities of 100,000.
The SE package uses a single-step overmold process and consists of a samarium cobalt magnet and the Hall-effect IC. This package provides an optimized magnetic solution for digital gear-tooth sensing applications and eliminates the presence of air voids that can be problematic during other multi-step package configurations. The close proximity of the magnet to the IC provides excellent heat sinking, permitting higher operating temperatures in a smaller user-friendly package.
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 more than 2,000 employees, Allegro is headquartered in Worcester, MA. Further information about Allegro, including free samples of our products, can be found at www.allegromicro.com.
