Data Sheet

ADBMS6830

16-Channel Multicell Battery Monitor

Rev. SpE

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FEATURES

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Simultaneous and continuous measurement of 16 cell voltages

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Passive cell balancing with programmable pulse-width modula-

tion control per channel

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Supports simultaneous cell balancing on adjacent channels

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Configurable digital low-pass filters per channel

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Bidirectional isoSPI interface

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2 Mbps isolated serial communications

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Uses a single twisted pair cable

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Low EMI susceptibility and emissions

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Capacitor or transformer-coupled

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Low-power cell monitoring mode

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Bus bar bypass and measurement support

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Up to 10 pins configurable as general-purpose analog input or

digital I/O

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Temperature or other sensor inputs

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Configurable as an I2C or SPI controller

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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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Sleep-state supply current of 4 μA

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72-/80-lead side-solderable package with exposed pad

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AEC-Q100 qualified for automotive applications

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ISO 26262 life cycle, ASIL D

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. Typical Application Circuit

GENERAL DESCRIPTION

The ADBMS6830 is a multicell battery stack monitor that measures

up to 16 series-connected battery cells.

All cells can be measured simultaneously with two individual

analog-to-digital converters (ADCs). Each channel includes a pro-

grammable digital low-pass filter. A second set of similar ADCs

provides closely correlated measurements to ensure redundant

measurement capability required to meet safety standards.

The ADBMS6830 allows bus bars to be bypassed and direct meas-

urement of negative bus bar voltages.

The ADBMS6830 has a bidirectional isolated serial-port inter-

face (isoSPI) for high-speed, RF-immune communication over

simple twisted pair cables. Using the isoSPI interface, multiple

ADBMS6830s may be connected in a daisy-chain configuration to

a battery management system (BMS) controller enabling simultane-

ous monitoring of long, high-voltage strings of battery cells. Using

the bidirectional feature, the daisy-chain may also be configured to

provide communication redundancy to protect against a cable break

along the chain.

The ADBMS6830 is powered directly from the battery to be meas-

ured by the linear regulator. The device supports internal and exter-

nal passive balancing with individually programmable pulse-width

modulation (PWM) control. When in SLEEP state, the device draws

4 µA, which minimizes the discharge of the battery stack.

For more information on the ADBMS6830, contact BMS_Doc_Request@analog.com.