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Miniature micropower, dual-output, unipolar Hall switch

10th January 2017

Posted By Paul Boughton


Specifically designed for battery-powered consumer equipment such as cellular phones, tablets, digital still and video cameras, while also embracing home appliances and industrial systems, the AH1389 Hall-effect switch IC introduced by Diodes Incorporated offers a small, simple and versatile contactless switch solution.

Applications include open/close detection for smart cover switches for cell phones and tablets, in addition to holster and dock detection for phones. It also features 360° rotation detection for display screens, video camera screen position detection, as well as position detection for doors, trays, selector switches and electronic locks in home appliances.

The AH1389 is a unipolar Hall switch that offers high sensitivity with a tightly defined magnetic operating window across its full operating voltage and temperature range. It provides dual outputs for detecting north or south poles independently.

Output 1 will switch on in the presence of a north pole with a magnetic flux strength that is below -25G and release when the flux exceeds -20G. Similarly, output 2 will switch in the presence of a south pole with a magnetic flux magnitude greater than +25G and release when the flux magnitude falls below +20G.

Optimised for portable and battery-powered applications, the micropower AH1389 operates from a 1.6V to 3.6V supply while consuming an average current of only 4μA. The device is specified for operation over a -40°C to +85°C temperature range and provides a high ESD rating of 8kV for improved reliability and ease of handling during end-equipment manufacture.









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