Tuesday, May 21, 2024

Data Acquisition IC For Voltage, Current And Temperature Sensing

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The battery monitor IC with integrated current sense amplifier offers up to 16 percent space and 20 percent cost savings

OEMs and electric vehicle manufacturers require battery systems that meet high safety requirements set by the ISO26262 guidelines. Now designers of automotive battery management systems (BMS) can deliver a high safety level for voltage, current, temperature and communication while also saving space and reducing solution cost, with the MAX17852 14-channel, high-voltage, ASIL-D data-acquisition system. Designed for integration within electric vehicles, hybrid electric vehicles and other transportation systems, the IC is ideal for smart junction box, 48V and other automotive battery systems which can see voltages up to 400V and beyond.   

The MAX17852 is a small, cost-effective IC that offers high accuracy for delivering voltage, current and temperature data with tight time synchronisation. It allows a typical cell voltage measurement of ±0.45mV at room temperature and a maximum of ±2mV error in a temperature range of 5 degrees to 40 degrees Celsius, enabling car OEMs to get the most mileage range out of their batteries. 

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With a current sense amplifier capability of +/-300mV and a gain setting up to 256 times and 0.3 per cent current sense gain error, the MAX17852 provides a fast, accurate data for calculating power management, state of health and state of charge. The 14-channel battery data acquisition system integrates a current sense amplifier so that current information is acquired at the same time as cell voltage and temperature. The MAX17852 allows both Hall effect sensor and shunt resistors to be used as sensing components. 

Other key features

  • Small size: High integration enables up to 16 per cent smaller size than a discrete solution to save board space.
  • Low cost: Integrated current sense amplifier provides up to 20 per cent cost savings

The MAX17852 and the MAX17852EVKIT# evaluation kit is available from Maxim Integrated or authorised distributors. 

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