ADM1266ACPZ-R7 datasheet(2/62 Pages) AD

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ADM1266

Data Sheet

Rev. A | Page 2 of 62

TABLE OF CONTENTS

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

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

Functional Block Diagram .............................................................. 1

Revision History ............................................................................... 3

Detailed Functional Block Diagram .............................................. 4

Specifications..................................................................................... 5

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

Thermal Resistance .................................................................... 10

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

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

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

Theory of Operation ...................................................................... 14

Powering the ADM1266............................................................ 14

Inputs ........................................................................................... 15

Programmable Driver Input/Outputs...................................... 16

General-Purpose Input/Outputs .............................................. 17

Sequencing Engine (SE)................................................................. 18

Overview...................................................................................... 18

Power-Up and State 0................................................................. 18

State Sections............................................................................... 18

Action Types................................................................................ 18

Parallel Operation and Interdevice Bus................................... 18

States............................................................................................. 19

Supply Margining ........................................................................... 20

Overview...................................................................................... 20

Black Box (EEPROM) Fault Recording ....................................... 22

Black Box Writes When External Supply Is Powering Down

....................................................................................................... 22

Triggering a Black Box Write .................................................... 22

Black Box Record Mode ............................................................ 22

Power-Up Counter ..................................................................... 22

Black Box Write Time ................................................................ 22

Black Box Contents .................................................................... 22

Time Stamping................................................................................ 23

Setting UNIX Time Using SET_RTC ...................................... 23

Internal Oscillator ...................................................................... 23

EXternal Oscillator ..................................................................... 23

Multiple Device Time Stamping............................................... 23

System Logic Block......................................................................... 24

Password Protection....................................................................... 25

Unlocking the Device ................................................................ 25

Locking the Device..................................................................... 25

Changing the Password ............................................................. 25

Memory ........................................................................................... 26

Overview ..................................................................................... 26

Power-Up..................................................................................... 26

Manual CRC Calculations......................................................... 26

Refresh ......................................................................................... 26

Auto Refresh ............................................................................... 26

Acceleration Factor .................................................................... 26

Applications Information .............................................................. 28

Overview ..................................................................................... 28

Powering the ADM1266............................................................ 28

PCB Assembly and Layout Suggestions .................................. 28

Capacitors.................................................................................... 28

Ground Connections ................................................................. 28

PMBus/I2C................................................................................... 28

IDB ............................................................................................... 28

Voltage Sensing........................................................................... 28

PDIOs and GPIOs ...................................................................... 28

DAC Outputs .............................................................................. 28

Clock ............................................................................................ 28

Unused Pins ................................................................................ 28

PMBus Digital Communication................................................... 29

PMBus Features .......................................................................... 29

Overview ..................................................................................... 29

Transfer Protocol........................................................................ 29

Data Transfer Commands ......................................................... 30

Group Command Protocol ....................................................... 31

Clock Generation and Stretching............................................. 31

Start and Stop Conditions ......................................................... 31

Repeated Start Condition.......................................................... 31

General Call Support ................................................................. 31

PMBus Address Selection ......................................................... 32

Fast Mode .................................................................................... 32

10-Bit Addressing....................................................................... 32

Packet Error Checking............................................................... 32

Electrical Specifications............................................................. 32

PMBus Commands ........................................................................ 33

Standard PMBus Command Descriptions.................................. 34

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