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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
Interfaces 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

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

Technical Documents

Type Description Language
Datasheet Document version 1-10 English
Datasheet Document version 1-10 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 Communication Interfaces English
Application Note Redundancy Bit English
Application Note AN5000 Magnet Selection Guide v1-04 English

Environmental Documents

Type Description Language
Material Declaration Form MDF_193570025_AS5247-HMFM English
Material Declaration Form MDF_193570025_AS5247-HMFT 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

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