LTC6803IG-2#PBF

LTC6803-2 is a 2nd generation, complete battery monitoring IC that includes a 12bit ADC, a precision voltage reference, a high voltage input multiplexer and a serial interface. This can measure up to 12 series connected battery cells or supercapacitors. This device can be stacked to measure the voltage of each cell in a long battery string. It has an individually addressable serial interface, allowing up to 16 devices to interface to one control processor and operate simultaneously. Each cell input has an associated MOSFET switch for discharging overcharged cells. It is pin compatible with the LTC6802-2, providing a drop-in upgrade. This connects the bottom of the stack to V– internally. Furthermore, this can be powered from an isolated supply, providing a technique to reduce battery stack current draw to zero. Typical applications are electric and hybrid electric vehicles, high power portable equipment, backup battery systems, electric bicycles, motorcycles, scooters.

• Measures up to 12 battery cells in series, stackable architecture, high EMI immunity
• Supports multiple battery chemistries and supercapacitors, open-wire connection fault detection
• 0.25% maximum total measurement error
• Engineered for ISO26262 compliant systems, 13ms to measure all cells in a system
• On-board temperature sensor and thermistor inputs, 1MHz serial interface with packet error checking
• Safe with random connection of cells, delta-sigma converter with built-in noise filter
• Measurement resolution is 1.5mV/Bit typ (quantization of the ADC, TA=25°C. V+=43.2V, V–=0V)
• Reference pin voltage range from 3.02 to 3.11V (RLOAD=100K to V–)
• 44-lead plastic SSOP package
• Temperature rating range from -40°C to 85°C

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