ADBMS1818

RECOMMENDED FOR NEW DESIGNS

18-Cell Battery Monitor with Daisy Chain Interface

Data Sheet (Rev. B) Product Selection Table

Part Models: 10
1ku List Price: Starting From $4.30

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Part Details

Measures up to 18 battery cells in series
3 mV maximum total measurement error
Stackable architecture for high voltage systems
Built-in isoSPI interface
- 1 Mb isolated serial communications
- Uses a single twisted pair, up to 100 meters
- Low EMI susceptibility and emissions
- Bidirectional for broken wire protection
290 μs to measure all cells in a system
Synchronized voltage and current measurement

16-bit Δ-Σ ADC with programmable third-order noise filter
Passive cell balancing up to 200 mA (maximum) with programmable pulse‑width modulation
9 general purpose digital I/O or analog inputs

Temperature or other sensor inputs
Configurable as an I²C or SPI master

6 μA sleep mode supply current
64-lead LQFP_EP package

Part Models: 10
1ku List Price: Starting From $4.30

Documentation

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
AD80918ASWAZ-RL	64-Lead LQFP (10mm x 10mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
ADBMS1818ASWAZ	64-Lead LQFP (10mm x 10mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
ADBMS1818ASWAZ-R7	64-Lead LQFP (10mm x 10mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
ADBMS1818ASWAZ-RL	64-Lead LQFP (10mm x 10mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
ADBMS1818ASWZ	64-Lead LQFP (10mm x 10mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
ADBMS1818ASWZ-R7	64-Lead LQFP (10mm x 10mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
ADBMS1818ASWZ-RL	64-Lead LQFP (10mm x 10mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
ADBMS1818CSWAZ	64-Lead LQFP (10mm x 10mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
ADBMS1818CSWAZ-R7	64-Lead LQFP (10mm x 10mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
ADBMS1818CSWAZ-RL	64-Lead LQFP (10mm x 10mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Aug 31, 2021 - 21_0182 Addition of alternative Fab foundry and die revision for ADBMS1818
		PCN21_0182_Form Material_Report Qualification Plan Qualification Results Summary
ADBMS1818ASWAZ	PRODUCTION
ADBMS1818ASWAZ-R7	PRODUCTION
ADBMS1818ASWAZ-RL	PRODUCTION
ADBMS1818ASWZ	PRODUCTION
ADBMS1818ASWZ-R7	PRODUCTION
ADBMS1818ASWZ-RL	PRODUCTION
Aug 10, 2021 - 21_0170 Addition of alternative test site for ADBMS1818
		PCN21_0170_Form Material_Report Test Correlation Report
ADBMS1818ASWZ	PRODUCTION
ADBMS1818ASWZ-R7	PRODUCTION
ADBMS1818ASWZ-RL	PRODUCTION

This is the most up-to-date revision of the Data Sheet.

Software Resources

Evaluation Software 1

ADBMS1818 LTSketchbook

Evaluation Kits

18-Cell Battery Stack Monitor with Daisy Chain Interface

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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
Bidirectional for Broken Wire Protection
290µs to Measure All Cells in a System
Synchronized Voltage and Current Measurement

16-Bit Delta-Sigma ADC with Programmable 3rd Order Noise Filter
Passive Cell Balancing Up to 200mA (Max) with Programmable Pulse-Width Modulation
9 General Purpose Digital I/O or Analog Inputs

Temperature or Other Sensor Inputs
Configurable as an I2C or SPI Master

6µA Sleep Mode Supply Current
64-Lead eLQFP Package

Product Details

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.

APPLICATIONS

Backup Battery Systems
Grid Energy Storage
High Power Portable Equipment

Resources

EVAL-ADBMS1818 Demo Manual

Software

ADBMS1818 LTSketchbook
20.15 M

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ADBMS1818

Part Details

Documentation

Data Sheet 1

User Guide 1

Application Note 1

Technical Articles 1

Webcast 1