DESCRIPTION
The LTC®6803 is a 2nd generation, complete 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 compatible 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.

FEATURES
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 Compliant 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
Delta-Sigma Converter With Built-In Noise Filter
Open-Wire Connection Fault Detection
12µA Standby Mode Supply Current
High EMI Immunity
44-Lead SSOP Package

APPLICATIONS
Electric and Hybrid Electric Vehicles
High Power Portable Equipment
Backup Battery Systems
Electric Bicycles, Motorcycles, Scooters