AS5171 High Resolution Position Sensor
High-resolution on-axis magnetic angular position sensor
Features
- 12-bit resolution @90° minimum arc
- Low output noise, low inherent INL
- Magnetic stray field immunity
- Functional safety, diagnostics, dual redundant chip version
- AEC-Q100 Grade 0 qualified
Benefits
- Resolve small angular excursion with high accuracy
- Accurate angle measurement
- Higher durability and lower system costs (no shielding needed)
- Enabler for safety critical applications
- SiP package (sensor + decoupling capacitors for ESD/EMC)
Product parameters
Resolution [bit] | 14 or 12 |
---|---|
Interface | |
Output | Analog ratiometric or PWM |
Max. Speed [rpm] | |
Overvoltage Protection | Yes |
Redundant | |
Supply Voltage [V] | 5.0 |
Temperature Range [°C] | -40 to +150 |
Package | SiP (system in package) |
Automotive Qualified | |
Longevity Program | January 2031 |
General description
The AS5171 is a high-resolution angular position sensor for precise absolute angle measurement. The AS5171 is available with an analog output interface (AS5171A) or a digital output interface (AS5171B).
The AS5171A and AS5171B are available in a SIP package (system in package). The package has integrated the AS5171 sensor die together with the decoupling capacitors necessary to pass system level ESD and EMC requirements. No additional components and PCB on the sensor side is needed. The product is defined as SEooC (Safety Element out of Context) according to ISO26262.
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:
- Brake and gas pedals
- Throttle valve and tumble flaps
- Steering angle sensors
- Chassis ride
- EGR
- Fuel level measurement systems
- 2/4WD switch
- Contactless potentiometers

Tools
Title | Category | Headline | Buy |
---|---|---|---|
SD4Y-PP | Accessories | Production Programmer SD4Y | |
AS5xxx-EK-USB-PB | Accessories | Programming Board for AS5xxx |
Resources
Type | Description | Language | ||
---|---|---|---|---|
Evaluation Software | AS5x70_EvalSW_AS5xxx-EK-USB-PB_v1-6.zip AS517x - Software for Evaluation Board (UART Programmer) | EN |
Technical documents
Type | Description | Language | ||
---|---|---|---|---|
Datasheet | Document version 1-06 | English | ||
Application Note | AN5000 Magnet Selection Guide v1-04 | English | ||
Application Note | Tape & Reel Packing Information | English |
Environmental documents
Type | Description | Language | ||
---|---|---|---|---|
Material Declaration Form | MDF_501220057_AS5171C-HSIT | English | ||
Material Declaration Form | MDF_501220047_AS5171B-HSIT | English | ||
Material Declaration Form | MDF_501220041_AS5171A-HSIT | English | ||
RoHS Certificate | RoHS_Certificate_AS5171 | English |
Notifications
Type | Description | Language | ||
---|---|---|---|---|
Product Change Notification | PCN38-2018 (AS50xx, AS51xx, AS52xx, AS54xx, AS8xxx) | English | ||
Product Change Notification | PCN32-2022 Introduction of new octal site test platform (DMX) (issued 05-April-22) | English |
Other information
Type | Description | Language | ||
---|---|---|---|---|
Block Diagram | AS5171 Block Diagram | English | ||
Factsheet | Position Sensors Family Overview | English | ||
Image | SiP-Package_A4 Magnetic Field Lines |