High-Speed, High-Resolution Rotary Position Sensor www.ams.com/AS5147P AS5147P – Safety-critical automotive applications - DAECTM Dynamic Angle Error Compensation - AEC-Q100 automotive qualified - 14-bit core resolution, 12-bit binary incremental pulse count - Immune to external stray-magnetic fields - Highest accuracy - Developed as Safety Element out-of-context (SEooC) according ISO26262 We provide innovative analog solutions to the most challenging applications in sensor and sensor interfaces, power management, and wireless. General Description The AS5147P is a high-resolution rotary position sensor for high-speed (up to 28krpm) angle measurement over a full 360 degree range. This new position sensor is equipped with a revolutionary integrated dynamic angle error compensation (DAEC™) with almost 0 latency. The robust design of the device suppresses the influence of any homogenous external stray magnetic field. A standard 4-wire SPI serial interface allows a host microcontroller to read 14-bit absolute angle position data from the AS5147P and to program non-volatile settings without a dedicated programmer. Incremental movements are indicated on a set of ABI signals with a maximum resolution of 4096 steps / 1024 pulses per revolution. The resolution of ABI signal is programmable to 4096 steps / 1024 pulses per revolution, 2048steps / 512 pulses per revolution or 1024 steps / 256 pulses per revolution. Brushless DC (BLDC) motors are controlled through a standard UVW commutation interface with a programmable number of pole pairs from 1 to 7. The absolute angle position is also provided as PWM-encoded output signal. The AS5147P supports embedded self-diagnostics including magnetic field strength too high, magnetic field strength too low or lost magnet, and other related diagnostic features. The product is defined as SEooC according ISO26262 including FMEDA, safety manual and third-party qualification. Benefits Features - - Eliminates angle measurement lag at high RPMs Lower system costs (no shielding) High resolution for motor and position control Simple replacement – reduces system cost Fast high-resolution position feedback Provides absolute and incremental angle measurements No programmer needed (via SPI command) Enables ASIL-x system safety level compliance Applications DAEC™ Dynamic angle error compensation Immune to external stray-magnetic fields 14-bit core resolution Encoder output: 1024 pulses Maximum speed up to 28.000 rpm SPI, PWM, UVW and ABI Interfaces Zero position, configuration programmable Developed per ISO 26262 SEooC DAEC™ Latency Comparison - Safety Critical Automotive Systems • EPS, Brakes and Airbags, for example - Resolver replacement - Discrete Hall commutation feedback replacement - Servo motor position control - BLDC/PMSM motor commutation • Pumps, DCT, Starter, Alternator, and Wipers, for example latency ≈ 0° No Compensation External Compensation Integrated DAEC™ AS5147P Block Diagram VDD3V3 AS5147P CSn SCL MISO MOSI Volatile Memory SPI VDD OTP LDO ABI Hall Sensors Analog Front-End A/D AGC ATAN (CORDIC) INTERPOLATOR Dynamic Angle Error Compensation UWV A B I/PWM U V W / PWM PWM Decoder Selectable on I or W GND www.ams.com [email protected] © 05/2015 by ams Subject to change without notice Headquarters ams AG Tobelbader Strasse 30, 8141 Unterpremstaetten, Austria Phone +43 3136 500-0 · Fax +43 3136 525-01 Sales Offices Worldwide [email protected] [email protected] [email protected]