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Magnetic rotary encoder senses positions

Posted: 15 Mar 2011 ?? ?Print Version ?Bookmark and Share

Keywords:magnetic? rotary? encoder? IC? contactless?

austriamicrosystems introduces the AS5050 10-bit magnetic rotary encoder IC for contactless position sensing. The device claims the industry's lowest power consumption and smallest size for similar devices. It incorporates automatic power-down and wake-up modes, targeting low-power robotics. It is also suited for servo motor control and as an input device for low-cost, battery-operated appliances.

The single-chip AS5050 touts four Hall sensor elements, a 10-bit angle encoder, a smart power management controller and an easy-to-use 3- or 4-wire SPI communications interface. It is housed in a 4 x 4mm QFN-16 package, and is said to be the smallest device in its class. Depending on the readout rate, the current consumption is reduced to?A levels. For example, 50?A at 10 measurements per second is the typical current drain C the lowest in the industry.

Only a few passive components and a magnet rotating above the chip are necessary to assemble a contactless position measurement encoder system. The AS5050 magnetic rotary encoder performs all angle calculations on-chip, features on-chip automatic wake-up and power-down, and only draws current when a new measurement is requested by the host controller. The AS5050 automatically powers down as soon as a measurement is completed.

The AS5050 rotary encoder IC operates from a 3.3V power supply over an ambient operating temperature range of -40C to 85C.

The AS5050 10-bit rotary encoder is available now.

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