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ADBMS6815WCSWZ DataSheet

ADBMS6815WCSWZ DataSheet

Part No.
Package Option
-40°C ~ 125°C (TJ)
48-Lead LQFP_EP (7mm x 7mm x 1.60mm w/ EP)
File Size
386 KB
19 Pages
Analog Devices, Inc.
Upload Time
2022-05-11 15:44:23
Update Time
Battery Management
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ADBMS6815WCSWZ Features

Measures up to 12 battery cells in series
Maximum lifetime total measurement error: 1.5 mV Stackable architecture for high voltage battery packs Built-in isoSPI interface
2 Mb isolated serial communications
Uses a single twisted pair, up to 20 meters 
Low EMI susceptibility and emissions 
Bidirectional for broken wire protection 
Capacitor or transformer coupled
Hot plug tolerant without external protection ADBMS6815WFS models designed for use in ISO 26262
applications for Automotive Safety Integrity Level Capability D (ASIL D)
Diagnostics for IC and application circuit failure modes 304 μs to measure all cells in a system
16-bit ADC with programmable noise filter
Passive cell balancing up to 300 mA per channel with
programmable PWM 
7 GPIO or analog inputs
Temperature or other sensor inputs Configurable as an I2C or SPI master
Sleep state supply current: 5.5 μA
48-lead LQFP package with exposed pad 
AEC-Q100 qualified for automotive applications

ADBMS6815WCSWZ Applications

Electric and hybrid electric vehicles 
Backup battery systems
Grid energy storage
Large portable power banks

ADBMS6815WCSWZ Description

The ADBMS6815WCSWZ is a multicell battery stack monitor that measures up to 12 series connected battery cells with a lifetime total measurement error (TME) of less than 1.5 mV. The cell measurement range of 0 V to 5 V makes the ADBMS6815 suitable for most battery chemistries. All 12 cells can be measured in 304 μs, and lower data acquisition rates can be selected for high noise reduction.

Multiple ADBMS6815 devices can be connected in series, permitting simultaneous cell monitoring of long, high voltage battery strings. Each ADBMS6815 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 ADBMS6815 can be powered directly from the battery stack or from an isolated supply. The ADBMS6815 includes passive balancing for each cell, with individual pulse-width modulation (PWM) duty cycle control for each cell. Other features include an on-board 5 V regulator, seven general-purpose input/output (GPIO) lines, and a sleep state, where current consumption is reduced to 5.5 μA.

The ADBMS6815WFS models are designed for use in ISO 26262 applications for Automotive Safety Integrity Level Capability D (ASIL D).

Related ADBMS6815WCSWZ Datasheet

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