The AS8510 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.
After analog to digital conversion and digital filtering, the resulting
16-bit digital words are accessible through 4-wire standard serial
interface.The device includes a number of additional features
explained in the next section.
2 Key Features
- 3.3V supply voltage
- 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
- Independent control of data rate on both channels
- 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 +125ºC ambient operation
- AEC - Q100 automotive qualified
- Internal chip ID for full traceability
- SSOP-20 pin package
3 Applications
The AS8510 is ideal for shunt based batteries sensor. For high-side
current sensing, the input signal may be conditioned using ams device AS8525 before applying to this device