ADT7422
Data Sheet
TABLE OF CONTENTS
Features.............................................................................................. 1
Temperature Value Registers ................................................... 13
Status Register............................................................................. 14
Configuration Register.............................................................. 14
THIGH Setpoint Registers............................................................. 15
TLOW Setpoint Registers ............................................................. 15
TCRIT Setpoint Registers ............................................................. 10
THYST Setpoint Register .............................................................. 15
ID Register .................................................................................. 15
Serial Interface ................................................................................ 16
Serial Bus Address...................................................................... 16
Writing Data............................................................................... 17
Reading Data............................................................................... 18
Reset ............................................................................................. 19
General Call ................................................................................ 19
INT and CT Outputs ..................................................................... 20
Undertemperature and Overtemperature Detection............ 20
Applications Information ............................................................. 22
Thermal Response Time ........................................................... 22
Supply Decoupling..................................................................... 22
Powering from a Switching Regulator .................................... 22
Temperature Measurement...................................................... 22
Quick Guide to Measuring Temperature ............................... 22
Outline Dimensions....................................................................... 23
Ordering Guide .......................................................................... 23
Applications ...................................................................................... 1
General Description......................................................................... 1
Product Highlights........................................................................... 1
Functional Block Diagram .............................................................. 1
Revision History ............................................................................... 2
Specifications .................................................................................... 3
I2C Timing Specifications............................................................ 4
Absolute Maximum Ratings ........................................................... 5
Thermal Resistance...................................................................... 5
ESD Caution.................................................................................. 5
Pin Configuration and Function Descriptions ............................ 6
Typical Performance Characteristics............................................. 7
Theory of Operation ........................................................................ 9
Circuit Information ..................................................................... 9
Converter Details ......................................................................... 9
Normal Mode................................................................................ 9
One Shot Mode............................................................................. 9
1 SPS Mode.................................................................................. 11
Shutdown Mode ......................................................................... 11
Fault Queue................................................................................. 11
Temperature Data Format ........................................................ 12
Temperature Conversion Formulas ........................................ 12
Registers........................................................................................... 13
Address Pointer Register........................................................... 13
REVISION HISTORY
4/2020—Rev. 0 to Rev. A
Changes to Data Sheet Title, Features Section, and General
Description Section.......................................................................... 1
Change to Accuracy Parameter, Table 1....................................... 3
1/2020—Revision 0: Initial Version
Rev. A | Page 2 of 23
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