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DS001088 ● v1-00 ● 2024-Jan-31

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AS8512

General description

AS8512 Battery pack current, voltage and

temperature sensor

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General description

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.

After analog to digital conversion and filtering, the resulting 16-bit data is accessible via 4-wire

standard serial interface (SPI).

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Key benefits & features

The benefits and features of AS8512 are listed below:

Table 1: Added value of using AS8512

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Precision, low noise, programmable gain amplifiers for both channels with gains 5, 25, 40, 100 to support wide

dynamic ranges.

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Option for multiplexing either one differential input, or two single ended inputs or the internal temperature

sensor on one channel.

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Programmable current source for external temperature sensor connectable to any of the inputs.

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High precision and high stability 1.2V reference voltage source.

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Digital signal processing with filter options for both

channels.

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Four operating modes providing

Benefits

Features

• Low supply voltage

• 3.3V supply voltage

• Redundant measurement possibility

• Two high resolution 16-bit Σ−Δ A/D converters

• Flexible configuration

• Programmable sampling to enable data throughputs

from less than 1Hz to 8kHz

• Unique measurement principle

• Zero offset for both channels