The MAX17843 is a programmable, highly integrated, high-voltage, 12-channel battery-monitoring smart data-acquisition interface with extensive features for safety. It is optimized for use with batteries used in automotive systems, hybrid electric battery packs, electric cars, and any system that stacks long series strings of secondary metal batteries. This highly integrated battery sensor incorporates a high-speed differential UART bus for robust daisy-chained serial communication.The analog front-end combines a 12-channel voltage-measurement data-acquisition system with a high-voltage switch-bank input. All measurements are done differentially across each cell. The full-scale measurement range is from 0 to 5.0V with a usable range of 0.2V to 4.8V. A high-speed successive approximation (SAR) A/D converter is used to digitize the cell voltages at 14-bit resolution with oversampling. All 12 cells can be measured in under 142µs. The MAX17843 uses a 2-scan approach for collecting cell measurements and correcting them for errors. This 2-phase approach yields excellent accuracy over temperature and in the face of extreme noise in the system.The MAX17843 has two auxiliary analog inputs that can be used to measure external thermistor components. A negative temperature coefficient (NTC) thermistor can be configured with the AUXIN analog inputs to accurately monitor module or battery-cell temperature. A thermal-overload detector disables the MAX17843's linear regulator to protect the IC, and a die-temperature measurement is also available.Applications48V Vehicle Battery Modules or SystemsBattery PacksElectric BikesHigh-Power Battery-Backup SystemsHigh-Voltage Electric Vehicle (EVs)Hybrid Electric Vehicles (HEVs)Power ToolsSuper-Cap Backup Systems