Hall-effect digital position sensor ICs detect changes in magnetic flux density

Allegro MicroSystems has developed a line of fully-integrated Hall-effect digital position sensor ICs that detect changes in magnetic flux density, allowing them to distinguish movement and position. Now available from Digi-Key, the contactless sensing solutions require few external components and can withstand the hostile operating conditions of automotive applications. Hall-effect digital position sensor ICs detect changes in magnetic flux density, allowing them to distinguish movement and position. These contactless sensing solutions require few external components and can withstand the hostile operating conditions of automotive applications. Specific advantages of Allegro's solutions include: 1 - 4x chopper-stabilization for offset cancellation provides: enhanced switch point stability that increases accuracy in measuring motor speed or duty cycle, and industry leading jitter performance that outperforms the competition 2 - Low voltage (3 V) operation and lower ICC for more power efficient devices 3 - Many standard products are designed to survive harsh automotive transient conditions, including double battery and 40 V load dump, without a limiting series resistor, which eliminates the need for external components and prevents transient voltage field failures