AS5040-ASST

The AS5040 is a contactless magnetic rotary encoder for accurate angular measurement over a full turn of 360º. It is a system-on-chip, combining integrated Hall elements, analog front end and digital signal processing in a single device. To measure the angle, only a simple two-pole magnet, rotating over the center of the chip, is required. The magnet may be placed above or below the IC. The absolute angle measurement provides instant indication of the magnet’s angular position with a resolution of 0.35º = 1024 positions per revolution. This digital data is available as a serial bit stream and as a PWM signal. Furthermore, a user-programmable incremental output is available, making the chip suitable for replacement of various optical encoders. An internal voltage regulator allows the AS5040 to operate at either 3.3 V or 5 V supplies.

Applications

• Industrial applications:
• Contactless rotary position sensing
• Robotics
• Brushless DC motor commutation
• Power tools
• Steering wheel position sensing
• Gas pedal position sensing
• Transmission gearbox encoder
• Headlight position control
• Power seat position indicator
• Office equipment: printers, scanners, copiers
• Replacement of optical encoders
• Front panel rotary switches
• Replacement of potentiometers