ADBMS1818ASWZ-R7 datasheet(2/89 Pages) AD

2 / 89 page

Data Sheet

ADBMS1818

TABLE OF CONTENTS

analog.com

Rev. 0 | 2 of 89

Features................................................................ 1

Applications........................................................... 1

General Description...............................................1

Typical Application Circuit......................................1

Specifications........................................................ 3

ADC DC Specifications...................................... 3

Voltage Reference Specifications.......................4

General DC Specifications................................. 5

ADC Timing Specifications.................................6

SPI DC Specifications........................................ 7

IsoSPI DC Specifications................................... 7

IsoSPI Idle/Wake-Up Specifications...................8

IsoSPI Pulse Timing Specifications....................8

SPI Timing Requirements.................................. 8

isoSPI Timing Specifications.............................. 9

Absolute Maximum Ratings.................................10

ESD Caution.....................................................10

Pin Configuration and Function Descriptions.......11

Typical Performance Characteristics................... 13

Functional Block Diagram....................................19

Improvements from the LTC6811-1..................... 20

Theory of Operation.............................................21

State Diagram.................................................. 21

ADBMS1818 Core State Descriptions..............21

isoSPI State Descriptions.................................22

Power Consumption.........................................22

ADC Operation.................................................23

Data Acquisition System Diagnostics...............29

Watchdog and Discharge Timer....................... 35

S Pin Pulse-Width Modulation for Cell

Balancing........................................................36

Discharge Timer Monitor.................................. 37

I2C/SPI Master on ADBMS1818 Using

GPIOs.............................................................37

S Pin Pulsing Using the S Pin Control

Settings.......................................................... 41

S Pin Muting.....................................................43

Serial Interface Overview................................. 43

4-Wire Serial Peripheral Interface (SPI)

Physical Layer................................................ 43

2-Wire Isolated Interface (isoSPI) Physical

Layer.............................................................. 43

Data Link Layer................................................ 53

Network Layer.................................................. 53

Memory Map........................................................61

Applications Information...................................... 68

Providing DC Power......................................... 68

Internal Protection and Filtering....................... 68

Cell Balancing.................................................. 72

Discharge Control During Cell

Measurements................................................74

Digital Communications....................................75

Enhanced Applications.....................................83

Reading External Temperature Probes............ 85

Typical Application...............................................86

Related Devices.................................................. 87

Outline Dimensions............................................. 88

Ordering Guide.................................................89

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