Incremental liner magnetic encoders

1 October 2008 Electronics Technology

austriamicrosystems has expanded its magnetic sensor product portfolio to include the AS5304 and AS5306, two high performance linear Hall sensor ICs.

The devices feature a new line of magnetic encoders for linear and off axis motion sensing applications, and provide an easy-to-use solution for motion control applications, as they require no configuration or calibration by the host controller after power up or during operation. Similar to optical sensors, the ICs provide incremental A and 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 allow designers to develop applications that track the absolute position once referenced from a known starting position after power up. The AS5304 and AS5306 can achieve resolutions of 25 μm and 15 μm, respectively.

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