LTC6802-1

FEATURES nn Qualified for Automotive Applications nn Measures Up to 12 Li-Ion Cells in Series (60V Max) nn Stackable Architecture Enables >1000V Systems nn 0.25% Maximum Total Measurement Error nn 13ms to Measure All Cells in a System nn Cell Balancing: nn On-Chip Passive Cell Balancing Switches nn Provision for Off-Chip Passive Balancing nn Two Thermistor Inputs Plus On-Board Temperature Sensor nn 1MHz Daisy-Chainable Serial Interface nn High EMI Immunity nn Delta Sigma Converter with Built-In Noise Filter nn Open Wire Connection Fault Detection nn Low Power Modes nn 44-Lead SSOP Package APPLICATIONS nn Electric and Hybrid Electric Vehicles nn High Power Portable Equipment nn Backup Battery Systems nn High Voltage Data Acquisition Systems All registered trademarks and trademarks are the property of their respective owners. LTC6802-1 Multicell Battery Stack Monitor DESCRIPTION The LTC®6802-1 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 ...