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AS5040 Rotary Sensor

10-bit rotary position sensor with digital angle (interface), ABI, UVW and PWM output


  • Contactless absolute angle position measurement and motion sensing
  • User programmable resolution, pole pairs and zero position
  • Multiple interfaces (SSI, ABI, UVW, PWM)
  • Immune to external magnetic stray fields


  • Highest reliability and durability in harsh environments
  • Great flexibility during assembly
  • One device for different applications
  • Lower material cost (no magnetic shielding needed)

Product parameters

Resolution [bit] 10
Interfaces SSI
Output Digital angle (interface) / ABI / UVW / PWM
Max. Speed [rpm] 30000
Overvoltage Protection
Supply Voltage [V] 3.3 or 5.0
Temperature Range [°C] -40 to +125
Package SSOP-16
Automotive Qualified

General Description

The AS5040 is a 10-bit rotary position sensor (previously known as encoder) for absolute angular measurement and with an incremental output over a full turn of 360° based on contactless magnetic sensor technology. This device fits perfectly for on-axis applications where a simple 2-pole magnet rotates above or below the sensor IC and the zero position can be programmed into the device. The absolute magnet angular position is measured with a resolution of 10 bit = 1024 positions per revolution and it is provided as a digital value on the serial interface (SSI) and on the PWM output 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:

  • Motor speed and motion sensor
  • Replacement of optical magnetic position sensors
  • Commutation of brushless motors
  • Robotics


Title Category Headline Buy
AS5040AdapterBoard Application Board Adapter Board for AS5040
AS5040DemoKit Application Board Demo Kit for AS5040
SD4Y-PP Accessories Production Programmer SD4Y
RMH05-DK-XX Accessories Rotary Magnetic Holder
AS5040-PB Application Board Programming Board for AS5040

Technical Documents

Type Description Language
Datasheet Document version 2-12 English
Application Note AN5000 Magnet Selection Guide v1-04 English
Application Note Tape & Reel Packing Information English
User Guide Adapter PCB English
User Guide Programming tool English

Environmental Documents

Type Description Language
RoHS Certificate RoHS Certificate AS5040 English


Type Description Language
EoL Notification AS50xx_AS53xx_tubes (issued 2017-Jun) English
Product Change Notification CN24-2018 (AS252x, AS504x, SL900A) English

Other Information

Type Description Language
Block Diagram AS5040 Block Diagram English
Factsheet All-Rounder English
Other Product Document AS5040-PB Image English
Other Product Document AS5000 Programmer Image English
Other Product Document AS5040DemoKit Image English
Other Product Document AS5040AdapterBoard Image English

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