LTC6803-3 Datasheet | Linear Technology

LTC6803-1/LTC6803-3 Multicell Battery Stack Monitor Features n n n n n n n n n n n n n n n n n 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. Using a unique level shifting serial interface, multiple LTC6803-1/ LTC6803-3 devices can be connected in series, without opto-couplers or isolators, allowing for monitoring of every cell in a long string of series-connected batteries. Each cell input has an associated MOSFET switch for discharging overcharged cells. The LTC6803-1 connects the bottom of the stack to V- internally. It is pin patible with the LTC6802‑1, providing a drop-in upgrade. The LTC6803-3 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. For applications requiring individually addressable serial munications, see the LTC6803-2/LTC6803-4. L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Measures Up to 12 Battery Cells in Series Stackable Architecture Supports Multiple Battery Chemistries and Supercapacitors Serial Interface Daisy Chains to Adjacent Devices 0.25% Maximum Total Measurement Error Engineered for ISO26262 pliant Systems 13ms to Measure All Cells in a System Passive Cell Balancing: - Integrated Cell Balancing MOSFETs - Ability to Drive External Balancing MOSFETs Onboard Temperature Sensor and Thermistor Inputs 1MHz Serial Interface with Packet Error Checking Safe with Random Connection of Cells Built-In Self Tests...