ADT7461A

Rev. A | Page 2 of 24

TABLE OF CONTENTS

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

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

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

Revision History ............................................................................... 2

General Description ......................................................................... 3

Differences between the ADT7461A and the ADT7461 ........ 3

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

SMBus Timing Specifications ..................................................... 5

Timing Diagram ........................................................................... 5

Absolute Maximum Ratings............................................................ 6

Thermal Resistance ...................................................................... 6

ESD Caution.................................................................................. 6

Pin Configuration and Function Descriptions............................. 7

Typical Performance Characteristics ............................................. 8

Theory of Operation ...................................................................... 10

Series Resistance Cancellation.................................................. 10

Temperature Measurement Method ........................................ 10

Temperature Measurement Results ......................................... 11

Temperature Measurement Range ........................................... 11

Temperature Data Format......................................................... 11

ADT7461A Registers ................................................................. 12

Serial Bus Interface..................................................................... 15

Addressing the Device ............................................................... 15

ALERT Output............................................................................ 17

Low Power Standby Mode......................................................... 17

Sensor Fault Detection .............................................................. 18

The ADT7461A Interrupt System............................................ 18

Application Information ........................................................... 19

Thermal Inertia and Self-Heating............................................ 20

Layout Considerations............................................................... 20

Application Circuit..................................................................... 21

Outline Dimensions ....................................................................... 22

Ordering Guide .......................................................................... 22

REVISION HISTORY

5/06—Rev. 0 to Rev. A

Changes to Features.......................................................................... 1

Changes to General Description .................................................... 3

Added Differences Between the ADT7461A and

the ADT7461 Section and Inserted Table 1 .................................. 3

Changes to Table 2............................................................................ 4

Changes to Table 4............................................................................ 6

Changes to Figure 14........................................................................ 9

Changes to Theory of Operation Section.................................... 10

Changes to Temperature Measurement Range Section............. 11

Changes to ADT7461A Registers Section................................... 12

Changes to Limit Registers Section.............................................. 13

Changes to Serial Bus Interface Section and Table 14 ............... 15

Changes to Low Power Standby Mode Section .......................... 17

4/06—Revision 0: Initial Version