Data Sheet

ADBMS6821/ADBMS6822

TABLE OF CONTENTS

analog.com

Rev. B | 2 of 28

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

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

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

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

Functional Block Diagram......................................3

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

Power-Supply Specifications..............................4

LPCM Timeout Specifications............................ 4

XCVRMD and PHAPOL Pin Specifications........5

INTR and WAKE Pin Specifications................... 5

Digital Pins DC Specifications............................ 5

isoSPI DC Specifications....................................6

isoSPI Idle/Wake-Up Specifications................... 6

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

Absolute Maximum Ratings...................................8

Thermal Resistance .......................................... 8

Electrostatic Discharge (ESD) Ratings...............8

ESD Caution.......................................................8

Pin Configurations and Function Descriptions.......9

Typical Performance Characteristics................... 11

Theory of Operation.............................................16

isoSPI Pulse Detail...........................................16

isoSPI Pulse Specifications..............................17

isoSPI Interaction and Timing.......................... 17

Receiver Common-Mode Bias......................... 19

SPI Configuration............................................. 19

Setting Clock Phase and Polarity .................... 19

Transceiver Modes...........................................19

isoSPI State Diagram....................................... 20

Power Supplies................................................ 20

Supply Current................................................. 20

Idle Mode and Wake-Up Detection.................. 21

WAKE Pin.........................................................21

Multidrop...........................................................21

LPCM Timeout Monitor.................................... 23

LPCM RTO (Resistor Timeout) Pin.................. 23

LPCM INTR Pin................................................23

LPCM Heartbeat Messages............................. 24

LPCM Expanded State Diagram...................... 24

LPCM Supply Current Consumption................ 24

SPI Pins During LPCM..................................... 25

Applications Information...................................... 26

Software Layer................................................. 26

Outline Dimensions............................................. 27

Ordering Guide.................................................28

Evaluation Boards............................................ 28

Automotive Products........................................ 28

REVISION HISTORY

7/2024—Rev. A to Rev. B

Changes to Ordering Guide........................................................................................................................... 28

1/2024—Revision A: Initial Version

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