LTC6803IG-1#PBF

LTC6803-1 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. It can measure up to 12 series-connected battery cells or supercapacitors. Using a unique level shifting serial interface, multiple 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. This connects the bottom of the stack to V– internally. It is pin compatible with the LTC6802-1, providing a drop-in upgrade. 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
• 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
• 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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