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Diodes unveils Hall switches

Posted: 11 Dec 2012 ?? ?Print Version ?Bookmark and Share

Keywords:micropower devices? magnetic field strengths? Hall effect?

Diodes Inc. has introduced four omnipolar Hall effect switches that claim to offer sensitivities to closely match the magnetic field strengths used in proximity and position detection in a variety of different product designs. According to the company, the micropower devices have also been optimised for battery and low-power operation, typically consuming just 24?W with a 3V supply.

Geared for portable consumer devices including cell phones, PDAs and laptops, as well as industrial products, the high-sensitivity AH1806 and AH1808 are each designed using two Hall effect plates. With operating thresholds set at 30G and 40G, the switches enable users to closely control the detection point. To suit 2.8V and 3.3V power rails, the switches' supply range is specified at 2.5-3.6V. AH1806 and AH1808 are initially being provided in the SOT553 package, with SC59 (SOT23) versions following in 1Q13.

The medium sensitivity AH1807 and low sensitivity AH1809 Hall effect switches provide typical operating points of 80G and 130G respectively and are used in applications featuring much stronger field strengths, including smart meters, home appliances and security equipment. For added flexibility, the switches' supply range is 2.5-5.5V and operating temperature range is extended, from -40C to 125C. There are two package options to choose from, SOT553 and the leaded SIP-3L, with SC59 (SOT23) again following in 1Q13.

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