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AS5047U - High Resolution Rotary Position Sensor

14-bit on-axis magnetic rotary position sensor with up to 14-bit binary incremental pulse count


  • DAEC ™ Dynamic angle error compensation
  • DFS ™ Dynamic filter system
  • Magnetic stray field immunity
  • Independent output interfaces: SPI, ABI, UVW, PWM


  • Easy to use – saving costs on DSP
  • Higher durability and lower system costs (no shield needed)
  • Versatile choice of the interface

Product parameters

Resolution [bit] 14
Max. Speed [rpm] 28000
Overvoltage Protection
Supply Voltage [V] 3.3 or 5.0
Temperature Range [°C] -40 to +125
Package TSSOP-14
Automotive Qualified No

General Description

The AS5047U is a high-resolution rotary position sensor for fast absolute angle measurement over a full 360-degree range. This new position sensor is equipped with revolutionary integrated dynamic angle error compensation (DAEC™) with almost 0 latency at higher rotational speed. For increased signal quality at lower rotational speed, the dynamic filter system (DFS ™) reduces transition noise. The robust design of the device suppresses the influence of any homogenous external stray magnetic field. A standard 4-wire SPI serial interface with a CRC protection allows a host microcontroller to read 14-bit absolute angle position data from the AS5047U and to program non-volatile settings without a dedicated programmer. Incremental movements are indicated on a set of ABI signals with a maximum resolution of 16989 steps / 4096 pulses per revolution. Brushless DC (BLDC) motors are controlled through a standard UVW commutation interface with a programmable number of pole pairs from 1 to 7. The absolute angle position is also provided as PWM-encoded output signal. AS5047U are single die sensors and are available in a TSSOP14 Package.

Magnets cannot be ordered at ams directly. Please find a list of recommended magnet suppliers.

This product suits for the following applications:

  • - Factory automation
  • - Building automation
  • - Robotics
  • - PMSM (permanent magnet synchronous motor)
  • - Stepper motor closed loop
  • - Optical encoder replacement


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Technical Documents

Name Type Description Version Language
AS5047U_BD000394_1-00.jpg Block Diagram Block Diagram of AS5047U 1-00 English
AS5047U_DS000637_1-00.pdf Datasheet Document version 1-00 1-00 English
AS5x47U_PD000487_1-00.JPG Other Product Document Picture of AdapterBoard AS5x47U 1-00 English

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