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Encoder IC provides 12-bit resolution at low rotational speeds

Posted: 17 Jun 2005 ?? ?Print Version ?Bookmark and Share

Keywords:austriamicrosystems? austriamicro? as5045? magnetic rotary encoder? rotary encoder?

austriamicrosystems introduced the newest member of its magnetic rotary encoder standard IC familythe AS5045, which is a 12-bit resolution device that provides absolute angle information in a digital format, and targets motion sensing applications in the industrial and automotive markets where a resolution below 0.1 of angle is required.

According to Ralf Kodritsch, marketing manager of austriamicro, the AS5045 addresses the requirement of motion sensing applications for a minimum 12-bit resolution at low rotational speeds. "Of course, the device operates at higher speeds as well, with reduced resolution," Kodritsch said.

The AS5045 offers user-programmable zero-position setting and diagnostic features, as well as the option to cascade several devices in a daisy chain configuration. This device is immune to magnet misalignment, air gap and ambient temperature variations.

The user can continuously access a serial digital output and pulse width modulated (PWM) output at the same time. The angular position information is provided in the form of a serial data stream and as a PWM signal with a resolution of 4096 positions per revolution (0.09 per step). The mode selector pin enables the user to adapt the device to meet the requirements of either high-precision or higher-speed applications.

Rated for operation between the -40C to 125C temperature range, the AS5045 operates at either 3.3V or 5V. It will be available for sampling in August in a Pb-free SSOP16 (5.3-by-6.2mm) package.

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