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Rotary encoders suit navigational knobs, joysticks

Posted: 11 Jun 2007 ?? ?Print Version ?Bookmark and Share

Keywords:magnetic rotary encoder? joysticks? navigational knobs? serial interface?

AS5046 magnetic rotary encoder from austriamicrosystems

austriamicrosystems introduces the AS5046, a 12bit resolution magnetic rotary encoder offering rotation, tilt and vertical distance detection of a magnet placed above the IC. The device can detect vertical distances over several millimeters, offering a suitable solution for contactless, multiaxis human interface devices, such as navigational knobs.

AS5046 is a complete SoC, combining both Hall-elements and a signal processor on one silicon chip. Aside from rotation detection mode, AS5046 also supports the detection of magnet tilt with push-button functionality. This paves way for new possibilities in human interface applications such as joysticks.

"To implement the joystick functionality, users only have to replace the diametrically polarized magnet with an axially polarized one," said Josef Janisch, product manager integrated magnetic sensors, austriamicrosystems. "We currently work with selected customers on joystick applications based on the AS5046. The chip allows users to build extremely small form factor joystick solutions for applications not only in industrial but also in consumer and communications markets."

AS5046 is the latest product in austriamicrosystems' family of contactless magnetic rotary encoders available in 8-, 10- and 12bit resolutions. It features different interfaces and operates in ambient temperatures of up to 150C. The device communicates with an external MCU over a two-wire serial interface. For standalone operation, AS5046 provides a programmable ratiometric analog output.

AS5046 is available in a Pb-free SSOP16 package. It can be operated using either a 3.3V or 5V supply and is specified for -40C to 125C ambient temperature. Samples and demo boards are available immediately.

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