AS5172B Magnetic Angular Position Sensor

ams’ magnetic position sensor features a high-resolution 12-bit PSI5 output according to PSI5 specification version 1.3 and 2.1

Image of ams AS5172B Position Sensor Based on hall sensor technology, the ams AS5172B magnetic position sensor measures the orthogonal component of the flux density (Bz) over a full-turn rotation, and compensates for external stray magnetic fields with a robust architecture based on a 14-bit sensor array and analog front end (AFE). A sub-range can be programmed to achieve the best resolution for the application. To measure the angle, only a simple two-pole magnet rotating over the center of the package is required. The magnet may be placed above or below the device. The absolute angle measurement provides an instant indication of the magnet’s angular position. The AS5172 operates up to a voltage of 16.5 V and is protected against overvoltage up to +20 V. In addition, the supply pins are protected against reverse polarity up to -18 V. Programmability over the VDD pin reduces the number of pins on the application connector. The AS5172 is available in a TSSOP-14 package and in a SiP (System in Package).

The SiP has integrated the AS5172 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 are needed. The product is defined as SEooC (safety element out of context) according to ISO 26262.

  • 12-bit resolution at 90° minimum arc
  • Low output noise, low inherent INL
  • Magnetic stray field immunity
  • Functional safety, diagnostics
  • AEC-Q100 Grade 0 qualified (AS5172B)
  • AEC-Q100 Grade 1 qualified (AS5172A)
  • System cost reduction – no PCB and additional components are needed


  • Ideal for automotive applications:
    • Brake and gas pedals
    • Throttle value and tumble flaps
    • Steering angle sensors
    • Chassis ride
    • EGR
    • Fuel-level measurement systems
    • 2/4WD switch
    • Contactless potentiometers

AS5172B Magnetic Angular Position Sensor

ImageManufacturer Part NumberDescriptionFor MeasuringTechnologyRotation Angle - Electrical, MechanicalAvailable QuantityView Details
SENSOR ANGLE 360DEG SMDAS5172B-HTSMSENSOR ANGLE 360DEG SMDAngleHall Effect0° ~ 360°, Continuous499 - ImmediateView Details
Published: 2018-12-12