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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
Interface 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
Longevity Program

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
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AS5040-PB Application Board Programming Board for AS5040
SD4Y-PP Accessories Production Programmer SD4Y

Technical documents

Type Description Language
Datasheet AS5040 Datasheet version 3-00 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
Material Declaration Form MDF_172860002_AS5040-ASSM English
Material Declaration Form MDF_172860002_AS5040 English
RoHS Certificate RoHS Certificate AS5040 English


Type Description Language
EoL Notification AS50xx_AS53xx_tubes (issued 2017-Jun) English
EoL Notification AS5xxx, AS6204, AS8223 EoL Notification (issued August-10-2021) English
Product Change Notification CN24-2018 (AS252x, AS504x, SL900A) English
Product Change Notification Test System Transfer from Synchromaster to LTX EX/MX Platform English

Other information

Type Description Language
Block Diagram AS5040 Block Diagram English
Factsheet All-Rounder English
Image AS5000 Programmer Image English
Image ASXXXX On-Axis SSOP16 Magnetic Field Lines
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