austriamicrosystems AG is now ams AG The technical content of this austriamicrosystems datasheet is still valid. Contact information: Headquarters: ams AG Tobelbaderstrasse 30 8141 Unterpremstaetten, Austria Tel: +43 (0) 3136 500 0 e-Mail: ams sales ams.com Please visit our website at www.ams.com AS5040 Data Sheet 10Bit 360 Programmable Magnetic Rotary Encoder 1 General Description 2 Key Features The AS5040 is a contactless magnetic rotary encoder Contactless high resolution rotational position for accurate angular measurement over a full turn of encoding over a full turn of 360 degrees 360. It is a system-on-chip, combining integrated Hall Two digital 10bit absolute outputs: elements, analog front end and digital signal processing - Serial interface and in a single device. - Pulse width modulated (PWM) output To measure the angle, only a simple two-pole magnet, Three incremental output modes: rotating over the center of the chip, is required. The - Quadrature A/B and Index output signal magnet may be placed above or below the IC. - Step / Direction and Index output signal The absolute angle measurement provides instant - 3-phase commutation for brushless DC indication of the magnets angular position with a motors resolution of 0.35 = 1024 positions per revolution. This - 10, 9, 8 or 7 bit user programmable digital data is available as a serial bit stream and as a resolution PWM signal. User programmable zero / index position Furthermore, a user-programmable incremental output is available, making the chip suitable for replacement of Failure detection mode for magnet placement various optical encoders. monitoring and loss of power supply An internal voltage regulator allows the AS5040 to Rotational speeds up to 30,000 rpm operate at either 3.3 V or 5 V supplies. Push button functionality detects movement of magnet in Z-axis Figure 1: Typical Arrangement of AS5040 and Magnet Serial read-out of multiple interconnected AS5040 devices using Daisy Chain mode Wide temperature range: - 40C to + 125C Fully automotive qualified to AEC-Q100, grade 1 Small Pb-free package: SSOP 16 (5.3mm x 6.2mm) 3 Applications Industrial applications: - Contactless rotary position sensing - Robotics - Brushless DC motor commutation - Power tools Automotive applications: Benefits - Steering wheel position sensing - Gas pedal position sensing Complete system-on-chip - Transmission gearbox encoder Flexible system solution provides absolute, - Headlight position control PWM and incremental outputs simultaneously - Power seat position indicator Ideal for applications in harsh environments Office equipment: printers, scanners, copiers due to contactless position sensing Replacement of optical encoders Tolerant to magnet misalignment and airgap Front panel rotary switches variations Replacement of potentiometers No temperature compensation necessary No calibration required www.austriamicrosystems.com Revision 2.10 1 - 33 ams AG Technical content still valid