AD 746±AC
ABLECOFC°ON EN ꢄC
Features .............................................................................................. 1
Temperature Measurement Results ......................................... 11
Temperature Measurement Range........................................... 11
Temperature Data Format......................................................... 11
ADT7461A Registers ................................................................. 12
Serial Bus Interface..................................................................... 15
Addressing the Device............................................................... 15
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
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
Rev. A | Page 2 of 24
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