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ADT7483A

Dual Channel Temperature Sensor and Over Temperature Alarm

ON Semiconductor 

ADT7483A

TABLE OF CONTENTS

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

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

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

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

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

Specifications .....................................................................................2

SMBus Timing Specifications......................................................4

Absolute Maximum Ratings ............................................................5

Thermal Characteristics...............................................................5

ESD Caution ..................................................................................5

Pin Configuration and Function Descriptions .............................6

Typical Performance Characteristics..............................................7

Theory of Operation.........................................................................9

Temperature Measurement Method...........................................9

Temperature Measurement Results ..........................................10

Temperature Measurement Range............................................10

Temperature Data Format..........................................................10

Registers .......................................................................................11

Serial Bus Interface .....................................................................17

Addressing the Device................................................................17

ALERT Output ............................................................................19

Masking the ALERT Output .....................................................19

Low Power Standby Mode .........................................................19

Sensor Fault Detection ...............................................................20

Interrupt System..........................................................................20

Applications .....................................................................................22

Noise Filtering .............................................................................22

Factors Affecting Diode Accuracy ...........................................22

Thermal Inertia and Self-Heating ............................................22

Layout Considerations ...............................................................23

Application Circuit .....................................................................23

Outline Dimensions........................................................................24

Ordering Guide ...........................................................................24

REVISION HISTORY

02/08—Rev 1: Conversion to ON Semiconductor

07/05—Revision 0: Initial Version

Rev. 1 | Page 2 of 24 | www.onsemi.com

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