Electronics Technology


12-bit magnetic rotary encoder IC

11 July 2007 Electronics Technology

For use in contactless, multi-axis human interface devices such as navigational knobs, austriamicrosystems has added the 12-bit AS5046 to its rotary encoder IC family. The device offers rotation, tilt and vertical distance detection (over several millimetres) of a magnet placed above it. It is a complete system-on-a-chip, combining both Hall elements and a signal processor on one silicon chip. In addition to rotation detection mode, the AS5046 also supports the detection of magnet tilt with pushbutton functionality. The device communicates with an external microcontroller over a 2-wire serial interface. For standalone operation, the AS5046 provides a programmable ratiometric analog output. It is available in a lead-free SSOP16 package. It can be operated at either 3,3 V or 5,0 V supply and is specified for -40°C to +125°C ambient temperature.



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