The LTC6802IG-1#PBF 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 battery monitor offers a measure mode, which simply monitors each cell for overvoltage and under voltage conditions. A standby mode is also provided. Each cell input has an associated MOSFET switch for discharging overcharged cells.
● Stackable architecture enables >1000V systems
● 0.25% Maximum total measurement error
● 13ms to Measure all cells in a system
● On-chip passive cell balancing switches
● Provision for off-chip passive balancing
● Two thermistor inputs plus on board temperature sensor
● 1MHz Daisy-chainable serial interface
● High EMI immunity
● Delta sigma converter with built-in noise filter
● Open wire connection fault detection
● Low power modes
