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Austrian Microsystems - Integrated Solution for Automotive Battery Sensing - 17 December 2012

New AS8515 from ams provides integrated solution for automotive battery sensing.

The sensor interface, which combines signal processing, voltage regulation and LIN transceiver in a single package, provides highly accurate and linear current, voltage and temperature measurement outputs.

  Product page  Datasheet

  • A precision voltage attenuator with power down facility
  • Power-On Reset with OTP adjustable reset timeout and brownout
  • A window Watchdog function in the normal mode and a timeout
  • Load dump protection (42V) for all battery supplied pins
  • Internal reverse polarity protection (up to -27V) for all battery sensing pins
  • Over temperature warning & shutdown functions
  • Two independent high resolution A/D converters
  • Programmable sampling rate up to 4kHz throughput
  • Programmable gain, low noise amplifier
  • Internal temperature sensor
  • Synchronous acquisition for both ADC channels
  • Reference-voltage source (high precision and high stability)
  • Offset auto zero architecture on both channels
  • Current monitoring comparator with interrupt signal generation
  • Precision on chip RC oscillator or external clock

  • Applications
    The AS8515 is suitable for battery sensors, having shunt current sensor at minus pole. For lead acid, AGM, Li-Ion batteries up to 18V nominal, 42V over voltage capability.

    The device is also ideal as a general purpose sensor interface for automotive LIN slaves.

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