AS5140H 10-Bit 360 Programmable Magnetic Rotary Encoder For High Ambient Temperatures The AS5140H is a contactless magnetic rotary encoder for General Description accurate angular measurement over a full turn of 360 and over an extended ambient temperature range of -40C to 150C. 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. An internal voltage regulator allows the AS5140H to operate at either 3.3V or 5V supplies. The AS5140H is pin-compatible to the AS5040 however it uses low-voltage OTP programming cells with additional programming options. Ordering Information and Content Guide appear at end of datasheet. Key Benefits & Features The benefits and features of AS5140H, 10-Bit 360 Programmable Magnetic Rotary Encoder For High Ambient Temperatures are listed below: Figure 1: Added Value of Using AS5140H Benefits Features Contactless high resolution rotational position encoding over a No mechanical wear full turn of 360 Two digital 10-bit absolute outputs: Serial interface and Pulse High resolution absolute position sensing width modulated (PWM) output Three incremental output modes: Quadrature A/B and Index Easy to use for motor control output signal, Step / Direction and Index output signal, 3-phase commutation for brushless DC motors Adjustable zero position User programmable zero / index position ams Datasheet Page 1 v1-09 2018-Feb-20 Document FeedbackAS 514 0H Gen e ra l De s c rip t ion Benefits Features Failure detection mode for magnet placement monitoring and Tolerant to magnet misalignment loss of power supply Usable for high speed applications Rotational speeds up to 10000 rpm Pushbutton functionality detects movement of magnet in Tolerant to airgap variations Z-axis Serial read-out of multiple interconnected AS5140H devices Supports daisy chain application using Daisy Chain mode Fitting to automotive applications Fully automotive qualified to AEC-Q100, grade 0 Operates up to 150C ambient temperature Wide ambient temperature range: -40C to 150C Applications The AS5140H is an ideal solution for automotive applications like engine compartment sensors, transmission gearbox encoder, throttle valve position control and for industrial applications like rotary sensors in high temperature environment. Block Diagram The functional blocks of this device for reference are shown below: Figure 2: AS5140H Block Diagram 9 9 9 0DJ,1&Q 0DJ (&Q 9 9 LDO 3.3V PWM 3:0B/6% Interface Q J 2 Absolute DSP Hall Array &RV 0DJ Interface &6 Q & (SSI) Frontend &/ . Amplifier OTP Register B/6%B8 Incremental Interface Programming AS5140H QGH B:, Parameters RJ 3U Page 2 ams Datasheet Document Feedback v1-09 2018-Feb-20 B9 %B LU Q 6L