AS5245 Rotary Sensor
Redundant 12-bit rotary position sensor with digital angle (interface) and ABI output
Features
- Contactless high resolution rotational position encoding over a full turn of 360º
- Two digital 12-bit absolute outputs
- Quadrature A/B (10- or 12-bit) and Index output signal
- User programmable zero position
- Failure detection mode for magnet placement monitoring and loss of power supply
- “Red-Yellow-Green” indicators display placement of magnet in Z-axis
- Tolerant to magnet misalignment and air gap variations
- Wide temperature range: - 40ºC to 150ºC
- Unique Chip Identifier
- Fully automotive qualified to AEC-Q100, grade 0
- Small package: QFN 32 LD (7x7)
Benefits
- No mechanical wear
- High resolution absolute position sensing
- Easy to use for motor control
- Adjustable zero position
- Tolerant to magnet misalignment
- Usable for high speed applications
- Tolerant to airgap variations
- Operates up to 150°C ambient temperature
- Supports daisy chain application
- Fitting to automotive applications
- Two sensors in one package
Product parameters
Resolution [bit] | 12 |
---|---|
Interface | SSI |
Output | Digital angle (interface) / ABI / PWM |
Max. Speed [rpm] | |
Overvoltage Protection | |
Redundant | Yes |
Supply Voltage [V] | 3.3 or 5.0 |
Temperature Range [°C] | -40 to +150 |
Package | QFN-32 |
Automotive Qualified | Yes |
Longevity Program |
General description
The AS5245 is a redundant, contactless magnetic rotary position sensor for accurate angular measurement over a full turn of 360° and over an extended ambient temperature range of -40°C to 150°C. The absolute angle measurement provides instant indication of the magnet’s angular position with a resolution of 0.0879° = 4096 positions per revolution via a serial bit stream and as a PWM signal.
With two decades of magnetic sensor system know-how, we have broad experience in selecting the most suitable magnets. ams experts recommend the following magnet suppliers.

This product suits for the following applications:
- Steering wheel position sensing
- Headlight position control
- Valve position sensing

Tools
Title | Category | Headline | Buy |
---|---|---|---|
AS5245AdapterBoard | Application Board | Adapter Board for AS5245 | |
RMH05-DK-XX | Accessories | Rotary Magnetic Holder | |
AS5245-PB | Application Board | Programming Board for AS5245 |
Technical documents
Type | Description | Language | ||
---|---|---|---|---|
Datasheet | Document version 1-08 | English | ||
Application Note | PPTRIM programming | English | ||
Application Note | AN5000 Magnet Selection Guide v1-04 | English | ||
Application Note | Tape & Reel Packing Information | English | ||
User Guide | Programming tool | English |
Environmental documents
Type | Description | Language | ||
---|---|---|---|---|
Material Declaration Form | MDF_177710115_AS5245-HMFP | English | ||
Material Declaration Form | MDF_177710115_AS5245-HMFM | English | ||
RoHS Certificate | RoHS AS5245 | English |
Notifications
Type | Description | Language | ||
---|---|---|---|---|
Product Change Notification | PCN01-2014 (AS5215, AS5245, AS5261, AS5262, AS5263, AS8223, AS8506, AS8515) | English | ||
Product Change Notification | PCN38-2018 (AS50xx, AS51xx, AS52xx, AS54xx, AS8xxx) | English |
Other information
Type | Description | Language | ||
---|---|---|---|---|
Block Diagram | AS5245 Block Diagram | English | ||
Image | AS5000 Programmer Image | English |