ams AS5247 Position Sensor Dual-Die

Longevity January 2031
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Longevity January 2031

Beschreibung

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.

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Details

Eigenschaften

  • 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

Vorteile

  • 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)

Parameter

Resolution
14 bit
11 bit
Interface
output
PWM
ABI
UVW
SPI
Rotation speed
max.
14500 rpm
Die in package
dual
Operating ambient temperature
min.
-40 °C
max.
150 °C
Package
MLF40
Automotive qualified
AEC-Q100
ASIL qualified
ASIL D
Accuracy typ.
0.4 °
Function
on-axis angle position sensing
Sensing technology
magnetic

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