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12-bit magnetic rotary encoder provides immunity against magnet misalignment

Unterpremstaetten, Austria — Austriamicrosystems AG rolled out a 12-bit resolution magnetic rotary encoder IC that addresses demand for high-resolution, low-speed applications.

The IC, which provides absolute angle information in a digital format, targets motion sensing applications in the industrial and automotive markets where a resolution below 0.1 degree of angle is required.

“There is a variety of motion sensing applications, where a minimum 12-bit resolution at low rotational speeds is required, such as torque measurement. The AS5045 addresses this requirement by providing 12-bit resolution at speeds below 1,000 revolutions per minute. Of course, the device operates at higher speeds as well, with reduced resolution,” said Ralf Kodritsch, marketing manager of Austriamicrosystems.

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.

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. The device is immune to magnet misalignment, air gap and ambient temperature variations. The AS5045 operates at either 3.3 V or 5 V. The operating temperature ranges from -40°C to +125°C. The AS5045 is available in a lead-free SSOP16 (5.3mm x 6.2mm) package.

The AS5045 will begin sampling in August, with volume slated for September/October. Pricing for the AS5045 encoder IC is $5.00 in 1,000-piece quantities. Click here for the AS5045 data sheet.

Austriamicrosystems , 1-919-676-5292, www.Austriamicrosystems.com.

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