austriamicrosystems announced the AS5013, a contactless magnetic encoder IC that monitors the displacement of a magnet incorporated in a knob relative to its center position and provides x and y position information via an I²C interface.
The AS5013 Hall-sensor IC is used in the EasyPoint mini joystick module, which consists of a mechanical stack incorporating a navigation knob, a magnet and the AS5013 magnetic encoder IC. Its simple construction and contactless sensing technology give the module very high reliability and is designed for any kind of 360° navigation input device.
2.7V to 3.6V operating voltage
down to 1.7V peripheral supply voltage
less than 190µA current consumption in low power mode (50Hz rate)
3µA current consumption in idle mode
lateral magnet movement radius up to 2mm
I²C interface up to 3.4MHz
configurable interrupt output for motion detection
2 operating modes: Idle mode and low power mode
Configurable read out rate, internally or externally synchronized
there is a magnet specicication on our EasyPoint home page - this magnet is specified for a displacement of +/- 2mm magnet movement in this mini joystick application. Here is the link: http://www.austriamicrosystems.com/eng/Products/Magnetic-Encoders/EasyPoint-Joystick-Encoder/AS5013
Regarding the material between sensor IC and magnet - every non ferromagnetic material can be used. Also aluminium! Distance between sensor IC and magnet can be 0.5mm up to 2.0mm depends on your magnet strength.
If you want to know more about this EasyPoint module please visit our blog site:
I am the marketer for this product and I like it very much. Basiacally it is designed for battery driven portable devices and you are perfectly right - it can be used for many varities of applications. If you want to know more about this device please take a look to "my" EasyPoint Blog page http://blog.easypoint.com/
Join our online Radio Show on Friday 11th July starting at 2:00pm Eastern, when EETimes editor of all things fun and interesting, Max Maxfield, and embedded systems expert, Jack Ganssle, will debate as to just what is, and is not, and embedded system.