The APS12625 and APS12626 sensor integrated circuits enable a reduction in system size and bill of materials (BOM) cost, along with increased performance and flexibility thanks to two-dimensional sensing. Developed in accordance with ISO 26262 and qualified according to AEC-Q100, they are suitable for automotive and other safety systems.
The APS12625 features speed and direction outputs, while the APS12626 has quadrature outputs (Channels A and B). A unique, optional feature allows the host system to reset the sensor to its previous state after a power-on cycle. This reduces the potential accumulation of missed counts in intelligent motion applications, such as power windows with anti-pinch requirements.
Each IC contains a pair of sensor ICs that are orthogonal to each other and provide a 90° phase separation between channels that is independent of magnet pole spacing and air gap. Both are available in each of the three combinations of vertical and flat Hall elements (XY, ZX, and ZY). Virtually any orientation between the sensor IC and the ring magnet can be accommodated, and the ring magnet pitch can be changed without losing quadrature.
"Allegro's vertical Hall technology enables sensor ICs that are especially well-suited for magnetic motor/encoder applications," says Jim Judkins, Product Line Director for Digital Position Sensor ICs at Allegro MicroSystems. Jim went on to explain that "designers can achieve a lower BOM cost and lower power consumption in a smaller board area while meeting their safety objectives and spending less time iterating designs to accommodate changes in the magnet field or system form factor."
These monolithic devices each include three Hall boards (one flat, two vertical), a multiplexer, a small signal amplifier, chopper stabilization, a Schmitt trigger, and two NMOS output transistors. They operate from 2.8 to 5.5 V and up to a junction temperature of 175°C. Each small SOT23-5 device replaces a pair of conventional Hall-effect latch ICs, meaning that redundant sensing for security applications can be achieved in virtually the same footprint as non-redundant implementations using legacy technology.
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- Category: Integrated Circuits
2D Hall effect direction and speed IC sensor for motor and magnetic applications
Allegro MicroSystems Europe has announced the launch of a new family of two-dimensional (2D) Hall effect Latch ICs featuring vertical and flat Hall elements.
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