LTC6802-1 Series

The LTC6802-1 is a complete battery monitoring IC that includes a 12-bit ADC, a precision voltage reference, a high voltage input multiplexer and a serial interface. Each LTC6802-1 can measure up to 12 series connected battery cells with an input common mode voltage up to 60V. In addition, multiple LTC6802-1 devices can be placed in series to monitor the voltage of each cell in a long battery string. The unique level-shifting serial interface allows the serial ports of these devices to be daisy-chained without optocouplers or isolators.When multiple LTC6802-1 devices are connected in series they can operate simultaneously, permitting all cell voltages in the stack to be measured within 13ms.To minimize power, the LTC6802-1 offers a measure mode, which simply monitors each cell for overvoltage and undervoltage conditions. A standby mode is also provided.Each cell input has an associated MOSFET switch for discharging overcharged cells.For large battery stack applications requiring individually addressable serial communications, see the LTC6802-2.SPI InterfaceFeaturesLTC6802-1Daisy ChainMultiple devices can be connected in serial fashion without digital isolationLTC6802-2AddressableParallel addressed SPI interface - each device in a chain communicates with a control processor in parallel via external digital isolatorsApplicationsElectric and Hybrid Electric VehiclesHigh Power Portable EquipmentBackup Battery SystemsHigh Voltage Data Acquisition Systems