Analog DevicesEVAL-ADBMS1818ZPower Management Development Boards and Kits

ADBMS1818 Battery Management Demonstration Circuit

New battery monitoring system evaluation platform from Analog Devices

The ADBMS1818 is a multicell battery stack monitor that measures up to 18 series connected battery cells with a total measurement error of less than 3mV.

The cell measurement range of 0V to 5V makes the ADBMS1818 suitable for most battery chemistries. All 18 cells can be measured in 290μs, and lower data acquisition rates can be selected for high noise reduction.

Multiple ADBMS1818 devices can be connected in series, permitting simultaneous cell monitoring of long, high voltage battery strings. Each ADBMS1818 has an isoSPI interface for high speed, RF immune, long distance communications. Multiple devices are connected in a daisy chain with one host processor connection for all devices. This daisy chain can be operated bidirectionally, ensuring communication integrity, even in the event of a fault along the communication path.

The ADBMS1818 can be powered directly from the battery stack or from an isolated supply. The ADBMS1818 includes passive balancing for each cell, with individual PWM duty cycle control for each cell. Other features include an onboard 5V regulator, nine general purpose I/O lines and a sleep mode, where current consumption is reduced to 6μA.

Key Features and Benefits

  • •  Measures Up to 18 Battery Cells in Series
  • •  3mV Maximum Total Measurement Error
  • •  Stackable Architecture for High Voltage Systems
  • •  Built-In isoSPI™ Interface
  • •  1Mb Isolated Serial Communications
  • •  Uses a Single Twisted Pair, Up to 100 Meters
  • •  Low EMI Susceptibility and Emissions


  • •  Backup Battery Systems
  • •  Grid Energy Storage
  • •  High Power Portable Equipment

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