AS5040 10-Bit 360 Programmable Magnetic Rotary Encoder The AS5040 is a contactless magnetic rotary encoder for General Description 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. The absolute angle measurement provides instant indication of the magnets angular position with a resolution of 0.35 = 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. Ordering Information and Content Guide appear at end of datasheet. Figure 1: Typical Arrangement of AS5040 and Magnet ams Datasheet Page 1 v2-12 2017-Jun-20 Document FeedbackAS50 40 Gene ral Des c rip t ion Key Benefits & Features The benefits and features of AS5040, 10-Bit 360 Programmable Magnetic Rotary Encoder are listed below: Figure 2: Added Value of Using AS5040 Benefits Features Contactless high resolution rotational position encoding Highest reliability and durability over a full turn of 360 degrees Simple user-programmable resolution, pole pairs and zero Simple programming position Serial communication interface (SSI) 10-bit pulse width modulated (PWM) output Multiple interfaces Quadrature A/B and Index output signal Step/Direction and Index output signal 3-Phase commutation for brushless DC motors Ideal for motor applications Rational speeds up to 30000 rpm Failure detection mode for magnet placement monitoring Failure diagnostics and loss of power supply Serial read-out of multiple interconnected devices using Easy setup daisy chain mode Great flexibility at a huge application Push button functionality detects movement of magnet in area Z-axis Fully automotive qualified AEC-Q100, grade 1 Small form factor SSOP 16 (5.3mm x 6.2mm) Robust environmental tolerance Wide temperature range: -40C to 125C Applications AS5040 is ideal for: 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 Page 2 ams Datasheet Document Feedback v2-12 2017-Jun-20