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AS5140H Datasheet(PDF) 2 Page - ams AG |
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AS5140H Datasheet(HTML) 2 Page - ams AG |
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2 / 38 page  AS5140H 10-Bit 360º Programmable Magnetic Rotary Encoder For High Ambient Temperatures www.austriamicrosystems.com/AS5140H Revision 1.4 1 - 37 Data Sheet 1 General Description The AS5140H is a contactless magnetic rotary encoder for accurate angular measurement over a full turn of 360º and over an extended ambient temperature range of -40ºC to +150ºC. 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. 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. Figure 1. AS5140H IC Block Diagram 2 Key Features Contactless high resolution rotational position encoding over a full turn of 360º Two digital 10-bit 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 User programmable zero / index position Failure detection mode for magnet placement monitoring and loss of power supply Rotational speeds up to 10.000 rpm Pushbutton functionality detects movement of magnet in Z-axis Serial read-out of multiple interconnected AS5140H devices using Daisy Chain mode Fully automotive qualified to AEC-Q100, grade 0 Wide ambient temperature range: -40ºC to +150ºC 3 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. DSP Hall Array & Frontend Amplifier OTP Register Programming Parameters Absolute Interface (SSI) Incremental Interface Sin Cos Ang Mag MagINCn MagDECn DO PWM_LSB CLK A_LSB_U B_Dir_V Index_W Prog CSn PWM Interface VDD5V VDDV3V LDO 3.3V AS5140H |
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