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Home / Sensors / AS5040 Sensor Module with Magnet Included, AS5040-SS_EK_AB Programmable Magnetic Rotary Encoder

Attributes

Brand -
Category Robotics / STEM Teaching Tools / Sensors
Origin -
Interface SSI, PWM, Analog
Resolution 12-bit (4096 positions)
Operating Voltage 3.0V to 3.6V
Max Speed 30,000 RPM
Accuracy ±0.5° typical
Package Type SSOP-16
Magnet Included Yes, Diametrically Magnetized
Temperature Range -40°C to +125°C
Programming Method OTP via Interface Pins
Application Industrial Automation, Robotics

6 reviews

A

Anonymous

Mar 25, 2026

Rating: 5/5

Excellent for university projects

Bought this for our final year thesis on autonomous navigation. The PWM output is easy to read with standard microcontrollers. The magnet alignment guide in the documentation was very helpful for beginners.

A

Anonymous

Mar 25, 2026

Rating: 5/5

Reliable in harsh environments

We deployed ten of these in a factory setting with significant vibration and temperature fluctuations. They have been running for six months without a single failure. The non-contact design is a huge plus for longevity.

A

Anonymous

Mar 15, 2026

Rating: 5/5

Perfect for robotic joint feedback

This sensor module works flawlessly with our custom robotic arm project. The 12-bit resolution provides smooth movement control, and the included magnet saved us sourcing time. Setup was straightforward using the SSI interface.

A

Anonymous

Mar 11, 2026

Rating: 4/5

Solid performance, good value

Compared to optical encoders, this magnetic solution is much more compact and resistant to dust. The only downside is that it is One-Time Programmable, so double-check your settings before burning them.

A

Anonymous

Mar 10, 2026

Rating: 5/5

Fast shipping and great product

Arrived well-packaged with the magnet securely attached to the demo board. Tested it immediately on a motor controller and the response time is instantaneous. Highly recommend for anyone needing rotary position data.

A

Anonymous

Mar 08, 2026

Rating: 4/5

Great precision, tricky initial config

The accuracy is impressive once you get the programming sequence right. Reading the datasheet is essential before starting. The analog output is very stable, though I wish the voltage range supported 5V directly without a regulator.

5 FAQ

Q: What is the maximum air gap allowed between the sensor and the magnet?

A: For optimal accuracy, we recommend an air gap of 0.5mm to 1.0mm. The sensor can function up to 2.0mm, but linearity and accuracy may decrease slightly at larger distances.

Q: Can this sensor be reprogrammed after the initial setup?

A: No, the AS5040 features OTP (One-Time Programmable) memory. Once the configuration bits are written, they cannot be changed. Please verify all parameters before programming.

Q: Is the included magnet suitable for high-temperature applications?

A: Yes, the included diametrically magnetized magnet is rated for the same operating temperature range as the sensor (-40°C to +125°C) and retains its magnetic properties within these limits.

Q: Does this module support daisy-chaining multiple sensors?

A: Yes, when using the SSI interface, multiple AS5040 devices can be daisy-chained to reduce the number of microcontroller pins required. Refer to the datasheet section 7.3 for wiring details.

Q: What microcontroller voltage levels are compatible with the IO pins?

A: The IO pins operate at 3.3V logic levels. If you are using a 5V microcontroller, you must use level shifters or a voltage divider to prevent damage to the sensor module.

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