Motion Sensors / Detectors / Transducers
Dual-Channel Sensor detects speed and direction.
Press Release Summary:
Suited for applications incorporating encoder ring magnet targets, Model A3423 features 2 Hall elements that are spaced 1.63 mm apart and photo-lithographically aligned to better than 1 µm. Low-drift amplifiers guarantee symmetry between switches to maintain signal quadrature, while on-chip regulator allows use of device over operating voltage of 3.8-24.0 V. Offering temperature stability, sensor withstands harsh automotive and industrial environments.
Original Press Release:
Allegro Introduces a New Dual-Channel, Hall-Effect Direction Detection Sensor
Robust sensor requiring fewer external components for protection against faults, transients and ESD
Worcester, MA, June 29, 2007 - Allegro introduces a new dual-channel Hall-effect sensor ideal for use in speed and direction sensing applications incorporating encoder ring magnet targets. Allegro's A3423 provides output signals that indicate speed and direction of the target. The Hall elements are both photo lithographically aligned to better than 1 µm. Maintaining accurate mechanical location between the two active Hall elements eliminates the major manufacturing hurdle encountered in fine-pitch detection applications.
This device is highly sensitive and temperature stable making it ideal for use in harsh automotive and industrial environments. The Hall elements of the A3423 are spaced 1.63 mm apart, which provides for excellent speed and direction information for small-geometry targets. Extremely low-drift amplifiers guarantee symmetry between the switches to maintain signal quadrature. An on-chip regulator allows the use of this device over a wide operating voltage range of 3.8 to 24.0 V. End-of-line trimming of the Hall element switchpoints provides for tight matching capability. The continuous-time method of offset cancellation delivers a fast start-up and signal recognition as well as very low noise on the output.
It is priced at $1.78 in quantities of 1,000 units and has a 14-week lead-time ARO. For more information on Allegro's new Hall-effect sensor, please access the following link: vocuspr.vocus.com/VocusPR30/Url.aspx?516867x1214x80447
For a high resolution photograph of this new device, please email me at sfennelly@allegromicro.com .
About Allegro
Allegro MicroSystems, Inc. is a global leader in the developing, manufacturing and marketing of high-performance power integrated circuits and integrated Hall-effect magnetic sensors. Allegro's innovative, system-level solutions serve high-growth applications within the automotive, computer/office automation, industrial, consumer and communications markets. With more than 2,500 employees, Allegro is headquartered in Worcester, MA. Further information about Allegro can be found at www.allegromicro.com .
