Data Sheet

ADBMS6830

16-Channel Multicell Battery Monitor

Rev. Sp0

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FEATURES

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Measures up to 16 battery cells in series

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Maximum lifetime TME: ±1.8 mV at 3.3 V per cell (–40°C to

+125°C)

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Simultaneous and continuous measurement of cell voltages

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Configurable integrated low-pass filtering

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Stackable architecture for high voltage battery packs

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Built-in isoSPI interface

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2 Mbps isolated serial communications

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Uses a single twisted pair, up to 20 meters per segment

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Low EMI susceptibility and emissions

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Bidirectional for broken wire protection

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Capacitor or transformer coupled

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Hot plug tolerant without external protection

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Passive cell balancing up to 300 mA per channel with program-

mable pulse-width modulation

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Up to 10 general-purpose analog inputs or digital I/O

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Temperature or other sensor inputs

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LPCM for cell and temperature monitoring in key-off state

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4 μA sleep mode supply current

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Provisions for bus bars

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AEC-Q100 qualified for automotive applications

APPLICATIONS

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Electric and hybrid electric vehicles

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Backup battery systems

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Grid energy storage

TYPICAL APPLICATION CIRCUIT

Figure 1.

GENERAL DESCRIPTION

The ADBMS6830 is a multicell battery stack monitor that measures

up to 16 series connected battery cells with a lifetime total meas-

urement error (TME) of less than 2 mV over the full temperature

range. The measurement input range of −2 V to +5.5 V makes

the ADBMS6830 suitable for most battery chemistries and allows

measurement of voltages across bus bars. Provisions are made for

bypassing bus bars without dedicating any measurement channels.

All cells can be measured simultaneously and redundantly with

two individual analog-to-digital converters (ADCs). The continuously

operating ADCs with a high sampling rate of 4.096 MHz allow

reduced external analog filtering and aliasing free measurement

results. Higher noise reduction can be achieved by subsequent

programmable infinite impulse response (IIR) filters.

Multiple ADBMS6830s can be connected in series, permitting si-

multaneous cell monitoring of long, high voltage battery strings.

for high speed, RF immune, long distance communications. Multiple

devices are connected in a daisy chain with one host processor

connection. This daisy chain can be operated bidirectionally, ensur-

ing communication integrity even in the event of a fault along the

communication path.

The ADBMS6830 can be powered from the battery stack or an

isolated supply. The ADBMS6830 includes passive balancing with

individual pulse-width modulation (PWM) duty cycle control and up

to 300 mA discharge current for each cell. Other features include

an on-board 5 V regulator, up to 10 general-purpose inputs/outputs,

and a sleep mode, where current consumption is reduced to 4 µA.

For more information on the ADBMS6830, see the ADBMS6830

product page.