ADBMS1818ASWZ-R7 datasheet(2/92 Pages) AD

2 / 92 page

Data Sheet

ADBMS1818

TABLE OF CONTENTS

analog.com

Rev. B | 2 of 92

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

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

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

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

Specifications........................................................ 4

ADC DC Specifications...................................... 4

Voltage Reference Specifications.......................5

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

ADC Timing Specifications.................................7

SPI DC Specifications........................................ 8

IsoSPI DC Specifications................................... 8

IsoSPI Idle/Wake-Up Specifications...................9

IsoSPI Pulse Timing Specifications....................9

SPI Timing Requirements.................................. 9

isoSPI Timing Specifications............................ 10

Absolute Maximum Ratings................................. 11

Thermal Resistance..........................................11

Electrostatic Discharge (ESD) Ratings.............11

ESD Caution.....................................................11

Pin Configuration and Function Descriptions...... 12

Typical Performance Characteristics................... 14

Functional Block Diagram....................................23

Improvements from the LTC6811-1..................... 24

Theory of Operation.............................................25

State Diagram.................................................. 25

ADBMS1818 Core State Descriptions..............25

isoSPI State Descriptions.................................26

Power Consumption.........................................26

ADC Operation.................................................27

Data Acquisition System Diagnostics...............33

Watchdog and Discharge Timer....................... 39

S Pin Pulse-Width Modulation for Cell

Balancing........................................................40

Discharge Timer Monitor.................................. 41

I2C/SPI Master on ADBMS1818 Using

GPIOs.............................................................41

S Pin Pulsing Using the S Pin Control

Settings.......................................................... 45

S Pin Muting.....................................................47

Serial Interface Overview................................. 47

4-Wire Serial Peripheral Interface (SPI)

Physical Layer................................................ 47

2-Wire Isolated Interface (isoSPI) Physical

Layer.............................................................. 47

Data Link Layer................................................ 57

Network Layer.................................................. 57

Memory Map........................................................65

Applications Information...................................... 71

Providing DC Power......................................... 71

Internal Protection and Filtering....................... 71

Cell Balancing.................................................. 75

Discharge Control During Cell

Measurements................................................77

Digital Communications....................................78

Enhanced Applications.....................................86

Reading External Temperature Probes............ 88

Typical Application...............................................89

Related Devices.................................................. 90

Outline Dimensions............................................. 91

Ordering Guide.................................................92

Evaluation Boards............................................ 92

REVISION HISTORY

9/2023—Rev. A to Rev. B

Changes to Table 11.......................................................................................................................................11

Moved Figure 3.............................................................................................................................................. 14

Changes to Table 19......................................................................................................................................27

Changes to Ordering Guide........................................................................................................................... 92

12/2021—Rev. 0 to Rev. A

Added 64-Lead LQFP_EP (SW-64-2)..............................................................................................................1

Changes to V+ Supply Current (IVP) Parameter, Table 3................................................................................. 5

Change to Regulator Start-Up Time (tWAKE) Parameter, Table 4..................................................................... 7

Changes to Table 11.......................................................................................................................................11

Added Thermal Resistance Section and Table 12; Renumbered Sequentially..............................................11

Added Electrostatic Discharge (ESD) Ratings Section.................................................................................. 11

Added ESD Ratings for ADBMS1818 and Table 13.......................................................................................11

Changes to Figure 3...................................................................................................................................... 12

ADBMS1818ASWZ-R7 数据表(PDF) 2 Page - Analog Devices

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