MAX17843ACB/V+

MAX17843ACB/V+ 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 analogue 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 5V with a usable range of 0.2 to 4.8V. A high-speed SAR ADC is used to digitize the cell voltages at 14bit resolution with oversampling. All 12 cells can be measured in under 142μs. MAX17843 uses a 2-scan approach for collecting cell measurements and correcting them for errors.

• 12-cell battery-voltage measurement for lithium-ion, NiMH, or super-cap cells
• Two auxiliary analogue inputs for NTC thermistor or absolute voltage measurement
• Die temperature measurement and alert
• High-accuracy differential measurement I/Os of ±2mV accuracy at +25°C and 3.6V
• Integrated 12-channel data-acquisition system
• Battery fault detection, 12 internal cell-balancing switches
• Integrated 9V to 65V input linear regulator
• Integrated temperature-compensated, voltage reference
• Robust differential daisy-chain UART interface, four general-purpose digital I/O lines
• Available in 64 pin LQFP package, temperature range from -40° to +125°C

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