LTC6803-2 Datasheet | Linear Technology

Features Measures Up to 12 Battery Cells in Series Stackable Architecture n Supports Multiple Battery Chemistries and Supercapacitors n Individually Addressable Serial Interface n 0.25% Maximum Total Measurement Error n Engineered for ISO26262 pliant Systems n 13ms to Measure All Cells in a System n Passive Cell Balancing: - Integrated Cell Balancing MOSFETs - Ability to Drive External Balancing MOSFETs n Onboard Temperature Sensor and Thermistor Inputs n 1MHz Serial Interface with Packet Error Checking n Safe with Random Connection of Cells n Built-In Self Tests n Delta-Sigma Converter With Built-In Noise Filter n Open-Wire Connection Fault Detection n 12µA Standby Mode Supply Current n High EMI Immunity n 44-Lead SSOP Package n n LTC6803-2/LTC6803-4 Multicell Battery Stack Monitor DESCRIPTION The LTC®6803 is a 2nd generation, plete battery monitoring IC that includes a 12-bit ADC, a precision voltage reference, a high voltage input multiplexer and a serial interface. Each LTC6803 can measure up to 12 series connected battery cells or supercapacitors. Many LTC6803 devices can be stacked to measure the voltage of each cell in a long battery string. Each LTC6803-2/LTC6803-4 has an individually addressable serial interface, allowing up to 16 LTC6803-2/LTC6803-4 devices to interface to one control processor and operate simultaneously. Each cell input has an associated MOSFET switch for discharging overcharged cells. The LTC6803-2 connects the bottom of the stack to V- internally. It is pin patible with the LTC6802-2, providing a drop-in upgrade. The LTC6803-4 separates the bottom of the stack from V- , improving cell 1 measurement accuracy. The LTC6803 provides a standby mode to reduce supply current to 12µA. Furthermore, the LTC6803 can be powered from an isolated supply, providing a technique to reduce battery stack current draw to zero. The related LTC6803-1 and LTC6803-3 offer a serial interface that allows the serial ports of...