General Description
The AS5040 is a contactless magnetic rotary encoder for accurate angular measurement over a full turn of 360°. 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.

Benefits
▪ Complete system-on-chip
▪ Flexible system solution provides absolute,
   PWM and incremental outputs simultaneously
▪ Ideal for applications in harsh environments
   due to contactless position sensing
▪ Tolerant to magnet misalignment and airgap
   variations
▪ No temperature compensation necessary
▪ No calibration required

Key Features
▪ Contactless high resolution rotational position
   encoding over a full turn of 360 degrees
▪ Two digital 10bit absolute outputs:
   - Serial interface and
   - Pulse width modulated (PWM) output
▪ Three incremental output modes:
   - Quadrature A/B and Index output signal
   - Step / Direction and Index output signal
   - 3-phase commutation for brushless DC
      motors
   - 10, 9, 8 or 7 bit user programmable
      resolution
▪ User programmable zero / index position
▪ Failure detection mode for magnet placement
   monitoring and loss of power supply
▪ Rotational speeds up to 30,000 rpm
▪ Push button functionality detects movement
   of magnet in Z-axis
▪ Serial read-out of multiple interconnected
   AS5040 devices using Daisy Chain mode
▪ Wide temperature range: - 40°C to + 125°C
▪ Fully automotive qualified to AEC-Q100,
   grade 1
▪ Small Pb-free package: SSOP 16 (5.3mm x 6.2mm)

Applications
▪ Industrial applications:
   - Contactless rotary position sensing
   - Robotics
   - Brushless DC motor commutation
   - Power tools
▪ Automotive applications:
   - 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