ams OSRAM AS8512

The AS8512 is a virtually offset free, low noise, two channel measurement device. It is tailored to accurately measure battery current from mA range up to kA range in conjunction with a 100 µΩ shunt resistor in series with the battery rail. Through the second measurement channel it enables capture of, either battery voltage synchronous with the current measurement, or, measure the analog output of an internal or external temperature sensor. Both channels are matched and can either measure small signals up to ±160 mV versus ground, through programmable gain amplifier or larger signals in the 0 to 1V range without the amplifier.

Key features

• Two high resolution 16-bit Σ−Δ A/D converters
• Programmable sampling to enable data throughputs from less than 1Hz to 8kHz
• Zero offset for both channels
• Flexible configuration

Additional features

• 3.3V supply voltage
• Precision, low noise, programmable gain amplifiers for both channels with gains 5, 25, 40, 100 to support wide dynamic ranges
• Option for multiplexing either one differential input, or two single ended inputs or the internal temperature sensor on one channel
• Programmable current source for external temperature sensor connectable to any of the inputs
• High precision and high stability 1.2V reference voltage source
• Digital signal processing with filter options for both channels
• Four operating modes providing:
  • Continuous data acquisition (or)
  • Periodic single-shot acquisition, (or)
  • Continuous acquisition on threshold crossing of programmed current levels (or)
  • A combination of the above
     
• On chip high-precision 4MHz RC oscillator or option for external clock
• -40ºC to 105ºC ambient operation
• Chip ID feature
• SSOP-20 pin package

Applications

• Current measurement
• Voltage measurement
• Temperature measurement
• Battery management