LTC6811HG-2#PBF

LTC®6811 is a multicell battery stack monitor that measures up to 12 series connected battery cells with a total measurement error of less than 1.2mV. This cell measurement range of 0V to 5V makes the LTC6811 suitable for most battery chemistries. All 12 cells can be measured in 290µs and lower data acquisition rates can be selected for high noise reduction. LTC6811 has an isoSPI interface for high speed, RF-immune, long distance communications. Using the LTC6811-2, multiple devices are connected in parallel to the host processor, with each device individually addressed. The LTC6811 includes passive balancing for each cell, with individual PWM duty cycle control for each cell. Other features include an on-board 5V regulator, five general purpose I/O lines and a sleep mode, where current consumption is reduced to 4µA. Typical applications are electric and hybrid electric vehicles, backup battery systems, grid energy storage, high power portable equipment.

• Powered directly from the battery stack or from an isolated supply
• Pin-compatible upgrade from the LTC6804
• 1.2mV maximum total measurement error
• Stackable architecture for high voltage systems, low EMI susceptibility and emissions
• Synchronized voltage and current measurement
• 16bit ADC with programmable noise filter, 4μA sleep mode supply current
• Engineered for ISO 26262-compliant systems
• Passive cell balancing with programmable timer
• 5 general purpose digital I/O or analogue inputs
• 48-lead plastic SSOP package, temperature range from –40°C to 125°C

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