Magnetic Encoder IC targets automotive applications.

Press Release Summary:

Model AS5145 contactless, 12-bit encoder IC provides angular measurement over 360° with resolution of 0.0879°, allowing 4,096 positions per revolution. Incremental quadrature output mode with interpolation algorithm can be enabled and permanently programmed with resolution of 10-12 bits. Unit can synchronize external electronics with itself and includes Sin/Cosine digital output mode. It operates at up to 150°C and from 3.3 or 5 V supplies.

Original Press Release:

austriamicrosystems Introduces AS5145, a Contactless, High-Resolution Magnetic Encoder IC for Automotive Applications

AS5145 allows absolute angle measurement with a resolution of 0.0879 degrees

Unterpremstaetten, Austria (October 6, 2008) - austriamicrosystems (SWX: AMS), a leading global designer and manufacturer of high performance analog ICs for automotive, communication, industry and medical applications, expanded its magnetic rotary encoder portfolio with the AS5145, a 12-bit encoder IC especially designed for the growing demands in automotive.

The AS5145 is a contactless, complete system-on-chip magnetic rotary encoder for accurate angular measurement over a full turn of 360° with a resolution of 0.0879° = 4096 positions per revolution. This digital angle data is available using a simple serial interface or as PWM signal. In addition, an incremental quadrature output mode with an improved interpolation algorithm can be enabled and permanently programmed with a resolution of 10 up to 12 bits. Due to the higher noise performance the accuracy is further improved.

"'Boost the precision of your rotation' was the vision behind the new device AS5145 whose target applications include transmission/gear box solutions where high accuracy in a harsh environment is required", commented Bernhard Czar, Marketing Director Automotive at austriamicrosystems. "The AS5145 also performs excellently in headlight position control units and fits perfectly into torque and valve position sensing applications. With the AS5145, austriamicrosystems expands its encoder portfolio with the next premium encoder for automotive sensing applications."

Besides all standard features of austriamicrosystems' encoder family such as user-specific zero programming, Chip-ID and diagnostic functions for the correct positioning of the magnet, the AS5145 additionally provides a special feature to synchronise external electronics with itself as well as a Sin/Cosine digital output mode. If this mode is activated, a 16 bit sinus and 16 bit cosines digital data of both channels will be switched out and an accurate calculation can be done externally.

For cascading multiple devices, a "Daisy Chain" mode is implemented allowing position data to be read out over the serial two-wire-bus. An internal voltage regulator allows the AS5145 to operate at either 3.3 V or 5 V supplies. Despite the wide ambient temperature range of up to 150°C, no additional temperature compensation and calibration of the device is required. The AS5145 is available in a lead-free SSOP-16 package.

Product-specific information is available at

Electronic picture and block diagram are available on request or at

About austriamicrosystems

austriamicrosystems is a leading designer and manufacturer of high performance analog ICs, combining more than 25 years of analog design capabilities and system know-how with its own state-of-the-art manufacturing and test facilities. austriamicrosystems leverages its expertise in low power and high accuracy to provide industry-leading customized and standard analog products. Operating worldwide with more than 1,000 employees, austriamicrosystems focuses on the areas of power management, sensors & sensor interfaces, portable audio and car access in its markets Communications, Industry & Medical and Automotive, complemented by its Full Service Foundry activities. austriamicrosystems is listed on the SWX Swiss Exchange in Zurich (ticker symbol: AMS).

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