Diodes has introduced three new Hall-effect switches which operate from a low supply voltage and at extremely low quiescent current to extend battery lifetime in mobile and portable devices. They can detect the open-closed status of covers and cases for portable electronic devices such as smartphones and tablets. They are also designed for proximity detection in digital cameras and handheld gaming consoles, as well as general contactless switching.
The AH1899A/B/S switches, with their supply-voltage range of 1.1V to 2.0V, seamlessly integrate with state-of-the-art application chipsets operating at 1.2V. Their power-efficient architecture lowers the typical average operating current to as little as 0.95µA at 1.2V. Their hibernating clocking system helps maximize system energy savings to extend the runtime of battery-operated devices.
Omnipolar, they operate with either north or south magnetic poles close to the package surface. Two sensitivity grades give designers flexibility to tailor the switch response for their application. The B and S versions operate when the magnetic field strength exceeds 30 Gauss and release at below 20 Gauss. The A version is a high-sensitivity switch that operates at 18 Gauss and releases at 12 Gauss. All versions remain off when no field strength is present.
