LTC6811-1

LTC6811-1/LTC6811-2 12-Cell Battery Stack Monitors FEATURES nn Pin-Compatible Upgrade from the LTC6804 nn Measures Up to 12 Battery Cells in Series nn 1.2mV Maximum Total Measurement Error nn Stackable Architecture for High Voltage Systems nn Built-in isoSPITM Interface nn 1Mb Isolated Serial Communications nn Uses a Single Twisted Pair, up to 100 Meters nn Low EMI Susceptibility and Emissions nn 290µs to Measure All Cells in a System nn Synchronized Voltage and Current Measurement nn 16-Bit ADC with Programmable Noise Filter nn Engineered for ISO 26262-Compliant Systems nn Passive Cell Balancing with Programmable Timer nn 5 General Purpose Digital I/O or Analog Inputs nn Temperature or other Sensor Inputs nn Configurable as an I2C or SPI master nn 4μA Sleep Mode Supply Current nn 48-Lead SSOP Package nn AEC-Q100 Qualified for Automotive Applications APPLICATIONS nn Electric and Hybrid Electric Vehicles nn Backup Battery Systems nn Grid Energy Storage nn High Power Portable Equipment DESCRIPTION The LTC®6811 is a multicell battery stack monitor that measures up to 12 series connected battery cells with a total measurement error of less than 1.2mV. The cell measurement range of 0V to 5V makes the LTC6811 suitable for most battery chemistries. All 12 cells can be measured in 290µs, and lower data acquisition rates can be selected for high noise reduction. Multiple LTC6811 devices can be connected in series, permitting simultaneous cell monitoring of long, high voltage battery...