TPOS Cam Sensor is factory-programmed and flexible.
Press Release Summary:
Offered as true zero-speed and True Power On State (TPOS) gear-tooth sensor, ATS675 incorporates single-element Hall IC with optimized custom magnetic circuit that switches in response to magnetic signals created by ferrous target. Digital IC eliminates detrimental effects of magnet and system offsets, and peak-detecting DACs set switching thresholds of device. Solution dynamically adapts to typical operating conditions found in automotive camshaft speed sensing applications.
Original Press Release:
Allegro MicroSystems, Inc. Introduces New Factory-Programmed TPOS Cam Sensor Flexible Device Suitable for a Wide Range of Demanding Camshaft Applications
Worcester, MA - July 11, 2008 - Allegro® introduces a new true zero-speed and True Power On State (TPOS) gear-tooth sensor, the ATS675. This new sensor incorporates a single-element Hall IC with an optimized custom magnetic circuit that switches in response to magnetic signals created by a ferrous target. Allegro's new device contains a sophisticated digital circuit designed to eliminate the detrimental effects of magnet and system offsets. Signal processing is used to provide device performance at zero target speed, independent of air gap, and also dynamically adapt to the typical operating conditions found in automotive camshaft speed sensing applications.
High-resolution peak-detecting DACs are used to set the switching thresholds of the device, ensuring high accuracy, even with target eccentricity and small target valleys. An internal hysteresis in the thresholds reduces the negative effects of anomalies in the magnetic signal (such as magnetic overshoot) associated with the targets used in many automotive applications, while still providing equivalent switch-points on both rising and falling electrical edges. Programmable options provide flexibility in the placement of both the running-mode and TPOS thresholds. The resulting output of the device is a digital representation of the ferrous target profile.
Targeted at the automotive market, Allegro's ATS675 device is offered in a four-lead SE package containing an integrated back-biasing magnet designed for TPOS operation.
About Allegro
Allegro MicroSystems, Inc. is a leader in developing, manufacturing and marketing high-performance power integrated circuits and integrated Hall-effect magnetic sensors. Allegro's innovative solutions serve high-growth applications within the automotive, communications, computer/office automation, consumer and industrial markets. Allegro is headquartered in Worcester, Massachusetts (USA) with design and applications centers located in North and South America, Asia, and Europe. Further information about Allegro can be found at www.allegromicro.com.
Copyright © 2008 Allegro MicroSystems, Inc. o 115 Northeast Cutoff, Worcester, MA 01606 USA o Phone: 1.508.853.5000 o Fax: 1.508.853.7895
