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Moteur de recherche de fiches techniques de composants électroniques |
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Moteur de recherche de fiches techniques de composants électroniques |
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AS8510 Fiches technique(PDF) 2 Page - ams AG |
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AS8510 Fiches technique(HTML) 2 Page - ams AG |
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2 / 47 page  AS8510 Data Acquisition Device for Battery Sensors www.ams.com/AS8510 Revision 3.5 1 - 46 1 General Description 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 µ Ω 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. VBAT_IN DVDD SDO SDI SCLK CS AVDD INT CLK DVSS RSHH RSHL ETR VCM ETS CHOP_CLK MEN VBAT_GND Internal Temperature Sensor PGA PGA 16-bit Sigma-Delta ADC 16-bit Sigma-Delta ADC Serial Interface Oscillators FIR / MA Analog Common Mode Chopper MUX and Chopper Bandgap Reference AVSS REF AS8510 Prog-Cur Source Figure 1. AS8510 Block Diagram |
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