Function description

12-cell battery pack monitor

The LTC®6811 is a multiple battery pack monitor that can

Measures up to 12 cells in series

The total measurement error is less than 1.2mV. cell

The LTC6811 measures from 0 volts to 5 volts

Suitable for most battery chemistries. All 12 cells can

Measured in 290µs, lower data acquisition rates can

Optional for high noise reduction.

Multiple LTC6811 devices can be connected in series, allowing long-term, high-voltage simultaneous battery monitoring

battery string. Each LTC6811 has a

High-speed, RF-immune, long-range communications.

Using the LTC6811-1, multiple devices are connected together

A daisy chain with all hosts connected to one host processor

equipment. Using the LTC6811-2, multiple devices are connected in parallel with the host processor, each device

handled separately.

The LTC6811 can be powered directly from a battery

Stacked or from an isolated supply. The LTC6811 includes

Passive balancing for each unit with individual PWM

Duty cycle control for each cell. Other features include

Automotive 5V regulator, five general purpose I/O lines and one

In sleep mode, current consumption is reduced to 4µA.

All registered trademarks and trademarks are the property of their respective owners. under protection

US patents, including 8,908,779, 9,182,428, 9,270,133.

Upgrade from LTC6804 to n pin compatible

nMeasure up to 12 cells in series

n 1.2mV maximum total measurement error

n Stackable structure for high voltage systems

nBuilt-in isoSPITM interface

n 1Mb isolated serial communication

n Use single twisted pair, up to 100 meters long

n Low EMI susceptibility and low radiation

n 290μs to measure all cells in the system

n Simultaneous voltage and current measurements

n 16-bit ADC with programmable noise filter

n Designed for ISO 26262 compliant systems

n Passive cell balancing with programmable timer

n 5 general purpose digital input/output or analog input

n temperature or other sensor input

n Configurable as I2C or SPI master

n4μA sleep mode supply current

n 48 lead SSOP package

n AEC-Q100 for automotive applications

application

n Electric and hybrid electric vehicles

n Backup battery system

n grid energy storage

n High power portable equipment