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10-bit magnetic rotary encoder works at 150ºC
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01/05/2007
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The AS5140H 10-bit magnetic rotary encoder IC has been designed for automotive use. It is fully qualified to AEC-Q-100 and is rated for applications in an ambient temperature range up to 150°C.
With a resolution of 0.35deg, the device from austriamicrosystems can recognise 1,024 positions within one 360deg turn, accessible with either a serial or a pulse-width modulation (PWM) interface. There are three differently programmable incremental outputs available to the user. One of these delivers a three-phase commutation signal for brushless DC motors.
Several features of the AS5140H, including user-specific zero programming, a diagnostic function for correct positioning of the magnet, or the ability to recognise interruptions to the power supply, are already standard in austriamicrosystems’ encoder product family. In addition, a ‘daisy chain’ mode has been added so that position data can be read serially over a two-wire bus.
An integrated voltage regulator means the AS5140H operates at either 3.3V or 5V.
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Author
Roger Bishop
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