This version (01 Apr 2024 01:49) was approved by Joyce Velasco.

EVAL-ADBMS6822 User Guide


The EVAL-ADBMS6822 is a dual SPI to 2-wire isolated serial port interface (isoSPI) adapter featuring the ADBMS6822. This board allows multiple ADBMS68xx battery monitors through daisy-chain connections. The EVAL-ADBMS6822 evaluation board also features reversible isoSPI, which enables a redundant path to the peripheral units. The PCB components and DuraClik connectors are optimized for low electromagnetic interference (EMI) susceptibility and emissions.

The EVAL-ADBMS6822 evaluation board can communicate to PC by connecting together with EVAL-SDP-CK1Z. The EVAL-ADBMS6822 evaluation board provides a standard SPI, which can be translated to isoSPI and then onward to a peripheral device or daisy chain as applicable.

The EVAL-ADBMS6822 evaluation board can also be used to evaluate the ADBMS6821. Note that for the ADBMS6821, there is only one SPI port; therefore, ignore the second SPI port and auxiliary isoSPI when using the ADBMS6821.

Full specifications on the ADBMS6822 dual isoSPI adapter are available in the ADBMS6821/ADBMS6822 data sheet available from Analog Devices, Inc. and must be consulted with this user guide when using the EVAL-ADBMS6822 evaluation board.


  • Full-featured evaluation board for the ADBMS6822
  • Demonstrates SPI to isoSPI 2-wire datalinks
  • Includes two isoSPi ports for reversible isoSPI support
  • Configurable powering options for LPCM support isoSPI connections through simple DuraClik connectors
  • Compatible with the EVAL-ADBMS68xx boards, battery monitor boards, EVAL-SDP-CK1Z controller board
  • With PC-based software for control and data analysis using Broad Market Browser BMS GUI


  • Electric and hybrid electric vehicles
  • Backup battery systems
  • Industrial networking
  • Remote sensors
  • Mobile Robot System
  • E-scooter/E-bikes/Light Electric Vehicle
  • Agricultural Gateway Hubs
  • Industrial Equipment Battery Monitoring
  • Metering Technology
  • Power Tools

System Architecture


Parameter Min Max
VDD Supply Voltage 3 V 5.5 V
VDDS Supply Voltage 1.7 V 5.5 V
V+ Supply Voltage 3 V 30 V
V+ Supply Voltage (LPCM) 6 V 30 V
VIH Input Range 0.7 VDDS -
VIL Input Range - 0.7 VDDS

Hardware Setup

Equipment Needed

Components and Connections

Shield-Mount Board Connection

The primary connection for the EVAL-ADBMS6822 is by plugging it into a microcontroller board (for example, the SDP-K1 or the AD-APARD32690-SL). The pins on the backside of the EVAL-ADBMS6822 connect directly with the sockets of the MCU board. The shield connections provide all the default data and power connections.

Note that the microcontroller board's interface voltage must be set to 3.3 V through Pin P4.

isoSPI Connections

J1 is the main isoSPI port. The applications that only use one port use this connection to make daisy-chain connections to peripheral isoSPI devices. J2 is an auxiliary port that is used as a redundant controller in a reversible isoSPI daisy-chain network, and as another indpendent isoSPI interface.

Optional Connections

SPI AUX Optional Header (J7)

This double row of through-holes (hole field) can be used to connect a fully independent AUX SPI channel. A connector or discrete wires can be soldered to this array.

JP1 to JP4 These are set as a group to either configure the AUX SPI traffic as being common (COM) with the MAIN SPI, or the POCI, PICO, SCK from the SDP-K1 controller, along with dedicated CSB lines to provide multiplexing. The separate setting (SEP) connects the AUX SPI signals to J7 exclusively.
JP5 Sets the SPI mode for both channels of the ADBMS6822. Mode 0 is used in most applications.
JP6 Two settings are provided for setting the low power cell monitoring (LPCM) response interval of the AUX channel: either 1.5 seconds or 48 seconds. Other intervals can be achieved with resistor value changes to the board.
JP7, JP11 Configures the operating modes of the AUX and MAIN channels, respectively. Positions of the jumper correspond to the following options:

2 MB: 2 MB peripheral with 1-bit latency
STD: Standard bidirectional isoSPI
LPC: Standard bidirectional isoSPI with LPCM timeout monitor support
4 MB: 4 Mbps unidirectional
JP8 Two options are provided for setting the LPCM response interval of the MAIN channel: either 1.5 seconds or 48 seconds. Other intervals can be achieved with resistor value changes to the board.
JP9 Configures the VDDS supply pins to either the VDD potential or an externally furnished voltage at turret VDDS EXT.
JP10 Configures the V+ supply pins to either the VDD potential or an externally furnished voltage at turret V+ EXT.

Pin Designations for the J7 SPI AUX Connector
Number Pin
5 CSB2


Software User Guide

For Software Setup instructions, visit the EVAL-ADBMS6830BMSW Software User Guide

Design & Integration Files

  • Schematic
  • PCB Layout
  • Bill of Materials
  • Allegro Project

Help and Support

For questions and more information, please visit the Analog Devices Engineer Zone.

End of Document

resources/eval/user-guides/eval-adbms6822.txt · Last modified: 20 Mar 2024 05:50 by Celso Aron