Omnipolar 3D Magnetic Sensor IC using vertical Hall-Effect Technology

Omnipolar 3D Magnetic Sensor IC using vertical Hall-Effect Technology

The A1266 from Allegro MicroSystems Europe is a unique 3-dimensional sensor IC incorporating a combination of vertical and traditional planar Hall-effect sensor ICs that can detect a magnetic field of either polarity in any direction.

The omnipolar, omnidirectional sensitivity of the new device makes it ideal for detecting magnetic tampering in smart meters, ATMs, gambling/gaming machines, ticket machines and electronic locks. The A1266 can also serve as a general-purpose magnetic switch that is virtually insensitive to magnet orientation or polarity in applications such as games, consumer electronics and white goods.

This compact surface-mount SOT23 IC is functionally equivalent to an array of three standard Hall-effect sensors mounted in three different orientations: something that is not possible using a single circuit board and all surface-mount components. With a typical BOP operating point of 25 G, the A1266 has higher sensitivity than most conventional Hall-effect switches, leading to high-sensitivity 3D tamper or proximity sensing in less space with lower assembly cost.

More information: Allegro MicroSystems