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Compact encoder ICs advance motion sensing apps

Posted: 16 Sep 2008 ?? ?Print Version ?Bookmark and Share

Keywords:magnetic sensor? encoder IC? signal?

austriamicrosystems AG has expanded its magnetic sensor product offerings, including the AS5304 and AS5306, two high-performance linear Hall sensor ICs.

The two sensor ICs feature austriamicrosystems' line of magnetic encoders for linear and off axis motion sensing applications. The devices do not require configuration or calibration by the host controller after power up or during operation. The linear magnetic encoder ICs can be used in a wide array of motion sensing applications used in medical, industrial and consumer products.

Similar to optical sensors, the AS5304 and AS5306 provide incremental A & B quadrature output signals with 160 steps per magnet pole pair, and an index pulse that is applied once every pole pair. The index pulse, together with the quadrature output signals, allows designers to develop applications that track the absolute position once referenced from a known starting position after power up.

The two ICs can achieve resolutions of 25?m and 15?m, respectively.

In addition to standard linear positioning applications, where a magnet strip moves laterally from left to right or vice versa over the IC, the AS5304 and AS5306 encoder ICs also support rotary off axis applications by using a circular ring magnet mounted outside of a rotating shaft. Rotary off axis encoding solutions can be used in applications where the magnet cannot be placed directly at the end of a rotating shaft due to mechanical constraints.

The AS5304 and AS5306 devices are available in a 20-lead 5mm x 5mm TSSOP device and are specified to operate at 5V over a temperature range from -40C to +125C.

- Ismini Scouras
eeProductCenter





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