Allegro MicroSystems, LLC Introduces Unique 2D Hall Effect Speed ​​and Direction Sensor ICs

Monday, February 26, 2018


The new product is a general-purpose sensor IC for motor and magnetic encoder applications

Allegro MicroSystems, LLC, announces the new APS12625 and APS12626 family of 2D Hall-effect latch ICs with vertical and planar Hall elements for 2D sensing, reducing system size and bill of materials (BOM) costs , And can improve performance and flexibility. Developed to ISO 26262, the APS12625 and APS12626 support the AEC-Q100 standard for automotive and other safety-critical systems.

The APS12625 has speed and direction outputs, while the APS12626 has four (channel A and B) outputs. The unique optional feature allows the host system to resume the previous state of the sensor upon power-up, which avoids data loss in smart motion applications such as window lifters with anti-pinch features.

Each integrated circuit contains a pair of sensor chips that are orthogonal to each other with a 90 ° phase separation between channels and are therefore independent of pole pitch and air gap. Both the APS12625 and APS12626 are available with a combination of three vertical and planar Hall elements (XY, ZX and ZY). In fact, any direction between the sensor IC and the ring magnet can be supported, and the spacing of the ring magnets can be adjusted while maintaining orthogonality.

Jim Judkins, Product Line Director, Digital Position Sensor ICs, Allegro MicroSystems, LLC, explains: "Allegro's vertical Hall technology is a unique sensor IC solution for magnetic motor / encoder applications where designers can operate on smaller area circuits Achieve lower cost and power consumption on the board, while meeting their security goals, and allow less time for repetitive design to support changes in magnetic spacing or system form factor. "

Each of these monolithic devices includes three Hall plates (one flat, two vertical), a multiplexer, a small signal amplifier, a chopper, Schmitt trigger and two NMOS output transistors. They operate from 2.8 to 5.5 V and support junction temperatures of up to 175 ° C (see device datasheet for details). Each device with a tiny SOT23-5 package can replace a traditional pair of Hall-effect latch ICs, which means redundant transfers can be made for safety-critical applications with nearly the same amount of space as traditional non-redundant solutions Sense program.

Author:Brittany Antonia (The author of article owns the copyright.)