Unipolar hall switch targets battery-powered apps
Article By : Diodes
Diodes’ AH1389 unipolar hall switch IC provides dual outputs for detecting north or south poles independently.
Diodes has launched the AH1389 unipolar hall switch IC that offers high sensitivity with a tight 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, according to the company. 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 4μA. The device is specified for operation over a -40°C to 85°C temperature range and provides an ESD rating of 8kV for improved reliability and ease of handling during end-equipment manufacture.
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.
