説明

ams' AS540x series uses two “pixel-cells” in a differential mode to guaranty robustness against all possible external influences like magnetic stray fields. In addition the IC contains an EEPROM to give a maximum of freedom to system designers concerning programming and linearization of the IC.

By using a simple two pole magnet, the absolute position information of the magnet is directly accessible over a SPI interface for module or as a PWM interface for remote applications. The AS540x series is operational over an ambient temperature range from -40°C up to 150°C and operates either up to 18V for the automotive or 3V supply voltage for the industry version. The AS540x family will be available in a small lead-free TSSOP package.

主な機能

• 3D magentic field sensor
• Insensitive to external magnetic stray fields (differential principle)
• Re-configurable E²PROM
• 33 point linearization
• Programmable output characteristic
• Configurable threshold position switch
• 150° ambient temperature
• Fully automotive qualified AEC-Q100
• Diagnostics including:
  • E²PROM signature & memory check
  • Overvoltage and reverse polarity protection
    including load dump
  • Short circuit monitoring
  • Watch dog
  • Broken wire
  • Magnetic field alarm

ｱﾌﾟﾘｹｰｼｮﾝ

• Linear position measurement
• Off-/on-axis rotation measurement
• Multi-axis joystick

Block diagram for AS54xx 3D Hall Magnetic Encoder IC