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AS5247 Position Sensor Dual-Die

Redundant 14-bit on-axis magnetic rotary position sensor with 11-bit binary incremental pulse count

Features

  • DAEC™ dynamic angle error compensation
  • 14-bit core resolution
  • Independent output interfaces: SPI, ABI, UVW, PWM
  • Zero position, configuration programmable
  • Self-diagnostics and redundancy
  • Immune to external stray fields

Benefits

  • Easy to use – saving costs on DSP
  • Good resolution for motor and position control
  • Versatile choice of the interface
  • No programmer needed (via SPI command)
  • Supports safety challenging applications
  • Lower system costs (no shielding needed)

Product parameters

Resolution [bit] 14 or 11
Interface SPI
Output ABI, UVW, PWM
Max. Speed [rpm] 14500
Overvoltage Protection
Redundant Yes
Supply Voltage [V] 3.3 or 5.0
Temperature Range [°C] -40 to +150
Package MLF-40 7x7
Automotive Qualified Yes
Longevity Program January 2031

General description

The AS5247 is a high-resolution redundant rotary position sensor for fast absolute 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 AS5247 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 2048 steps / 512 pulses per revolution. The resolution of the ABI signal is programmable to 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 AS5247 supports embedded self-diagnostics including magnetic field strength too high, magnetic field strength too low or lost magnet, and other related diagnostic features. The AS5247 is available as a dual die in a compact MLF-40 7x7 package.

With two decades of magnetic sensor system know-how, we have broad experience in selecting the most suitable magnets. ams experts recommend the following magnet suppliers.

This product suits for the following applications:

  • Electric power steering (EPS)
  • Transmission (gearbox, actuator)
  • Brake (actuator)
  • Starter and alternator

Tools

Title Category Headline Buy
RMH05-DK-XX Accessories Rotary Magnetic Holder
USBI&PBox Accessories USB I&P Box for I2C/SPI
AS5247AdapterBoard Application Board Adapter Board for AS5247
AS5247SocketBoard Application Board Socket Board for AS5247

Technical documents

Type Description Language
Datasheet Document version 1-10 English
Application Note Dynamic Angle Error Compensation Description English
Application Note Zero Position Programming in Motor Control Application English
Application Note Redundancy Bit English
Application Note Communication Interfaces English
Application Note AN5000 Magnet Selection Guide v1-04 English
Application Note Tape & Reel Packing Information English
Application Note USB Interface & Programming Box English

Environmental documents

Type Description Language
Material Declaration Form MDF_193570025_AS5247-HMFM English
Material Declaration Form MDF_193570025_AS5247-HMFT English
RoHS Certificate RoHS Certificate_AS5247 English

Notifications

Type Description Language
Product Change Notification PCN38-2018 (AS50xx, AS51xx, AS52xx, AS54xx, AS8xxx) English

Other information

Type Description Language
Block Diagram AS5247 Block Diagram English
Factsheet Contactless Magnetic Position Sensing for Motor Control English
Factsheet Position Sensors Family Overview English
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