Date: 09/10/2008

12-bit contactless magnetic encoder IC AS5145 for automotive field

Austria Microsystems introduced AS5145, a 12-bit encoder IC especially designed for the growing demands in automotive.
The new device is a contactless, complete system-on-chip magnetic rotary encoder for angular measurement over a full turn of 360° with a resolution of 0.0879° = 4096 positions per revolution.
It has a special feature to synchronize external electronics with itself as well as a Sin/Cosine digital output mode. If this mode is activated, a 16-bit sine and 16 bit cosine digital data of both channels will be switched out and an accurate calculation can be done externally.

Some of the features are listed below:

1. The digital angle data is available using a simple serial interface or as PWM signal.
2. 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.
3. The higher noise performance improves the accuracy.
4. User-specific zero programming, Chip-ID and diagnostic functions for the correct positioning of the magnet.
5. For cascading multiple devices, a "Daisy Chain" mode is implemented allowing position data to be read out over the serial two-wire-bus.
6. An internal regulator allows the chip to operate at either 3.3 V or 5 V supplies.
7. Wide ambient temperature range of up to 150°C.

Packaging: lead-free SSOP-16 package.

Further information is available at: http://www.austriamicrosystems.com