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AS5171 Position Sensor

High-Resolution On-Axis Magnetic Angular Position Sensor

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 ISO26262.

AS5171 Magnetic Position Sensor block diagram

Key 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

Key Benefits

  • Resolve small angular excursion with high accuracy
  • Accurate angle measurement
  • Higher durability and lower system costs (no shield needed)
  • Enabler for safety critical applications
  • SiP Package (sensor + decoupling capacitors for ESD/EMC)

Applications

The AS5171 SiP is ideal for automotive applications like:

  • Brake and Gas Pedals
  • Throttle Valve and Tumble Flaps
  • Steering Angle Sensors
  • Chassis Ride
  • EGR
  • Fuel-Level Measurement Systems
  • 2/4 WD Switch
  • Contactless Potentiometers

AS5171 Product Facts

Resolution 14-bit/12-bit
Interfaces
Output Analog ratiometric or PWM
Max speed [rpm]
Overvoltage protection [ ]
Redundant
Supply voltage [V] 5.0
Temperature range [°C] -40 to +150
Package SiP (System in Package)
Automotive qualified