AS5601 - Low Cost Rotary Magnetic Position Sensor

October 18th, 2016

AS5601 - Low Cost Rotary Magnetic Position Sensor

by Admir Heljo
Technical Product Manager

The AMS AS5601 is a low cost rotary magnetic position sensor that is ideal for various rotary knob applications. This contactless sensor provides a 12-bit digital output that measures the absolute angle of a diametric magnetized on-axis magnet. The AS5601 offers magnetic stray field immunity and is equipped with a smart low power mode to automatically reduce power consumption. It also integrates a push button output by detecting sudden air gap changes between the magnet and sensor.


All of these features make the AS5601 ideal for:

  • Washers
  • Dryers
  • Stoves
  • Dishwashers
  • Automotive Controls
  • Medical Equipment
  • RC Robotic Controllers
  • Home Automation Controls
  • and Many Other Contactless Encoder Applications

Reference Design Highlight
To illustrate the functionality of the AS5601, PMT created a reference design for a potential washing machine application. The knob has been programmed for 16 steps, with each step representing a different wash cycle. This information is then displayed on an LCD screen. What we have learned through the reference design process, is that the AS5601 really simplifies the design process through a simple user programmable zero position and device configuration. The programming and output is done over I2C.

This reference design is a perfect example of some of the benefits of using magnetic technology versus more traditional methods, such as potentiometers. It eliminates any contact issues, reliability issues caused by dirt and debris, and durability issues caused by wear and tear of mechanical components. Overall, it will improve and extend overall system life and performance.

Why Choose Precision Measurement Technologies?

PMT offers technology solutions as well as "technology disruption" for all AMS/ACAM products specifically in applications that require high levels of technical support and design. We provide reference designs, white papers, review schematics, assist with evaluation kits down to the register level, provide demonstrations and conceptual designs to assist customers with a jump start on the technology. PMT is there for our customers from concept all the way through to production.