Motion Sensors / Detectors / Transducers
Chopper-Stabilized Latch targets automotive applications.
Press Release Summary:
Suited for motor-speed and direction-sensing applications, current-output, Hall-effect Model A1242 features 2-wire design that provides inherent short/open detection. Unit employs high-frequency chopper-stabilization technique on digital analog BiCMOS process to achieve magnetic stability over temperature. It provides on-chip transient protection, while zener clamp on power supply protects against over-voltage conditions on supply line.
Original Press Release:
Allegro Microsystems, Inc. Introduces New Chopper-Stabilized Latch
A1242 ideal for motor-speed and direction-sensing applications
Worcester, MA, Sept. 15, 2005 - Allegro MicroSystems, Inc. announces the A1242, a new chopper-stabilized latch ideally suited for use in motor-speed and direction-sensing applications, as well as in other applications where the sensor is located far from the ECU. This sensor requires one less wire in the wiring harness than the comparable three-wire Hall-effect latch. Additionally, the two-wire feature of this sensor provides inherent short/open detection.
The A1242 is a two-wire, current-output, Hall-effect latch that is ideally suited for use in automotive, industrial and consumer applications. The sensor employs a patented high-frequency chopper-stabilization technique on Allegro's new DABIC5 (Digital Analog BiCMOS) process to achieve magnetic stability over temperature. The A1242 operates accurately and consistently in harsh environments, such as those commonly found in automotive applications. Additionally, the A1242 is designed for flexibility by offering two different output current level options.
This device provides on-chip transient protection, while a zener clamp on the power supply protects against over-voltage conditions on the supply line. The output of this family will switch HIGH in the presence of a sufficiently large south-pole magnetic field and LOW in the presence of a sufficiently large north-pole magnetic field.
Targeted at the consumer, automotive and industrial markets and supplied in surface-mount (LH) and insertion-mount (UA) packages, the A1242 will have a six- to eight-week leadtime to market for the UA package and 10- to 12-week leadtime for the LH package. The A1242 is priced at $0.50 for quantities of 10,000.
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 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.
