ADT7312
Data Sheet
TABLE OF CONTENTS
Features .............................................................................................. 1
Temperature Value Register...................................................... 15
ID Register................................................................................... 15
TCRIT Setpoint Register ............................................................... 15
THYST Setpoint Register............................................................... 16
THIGH Setpoint Register .............................................................. 16
TLOW Setpoint Register ............................................................... 16
Serial Interface ................................................................................ 17
SPI Command Byte.................................................................... 17
Writing Data ............................................................................... 18
Reading Data............................................................................... 19
Interfacing to DSPs or Microcontrollers................................. 19
Resetting the Serial Interface.................................................... 19
INT and CT Outputs...................................................................... 20
Undertemperature and Overtemperature Detection ............ 20
Redundant Critical Generator.................................................. 21
Applications Information.............................................................. 22
Thermal Response Time ........................................................... 22
Supply Decoupling ..................................................................... 22
Powering from a Switching Regulator..................................... 22
Temperature Monitoring........................................................... 22
Quick Guide to Measuring Temperature ................................ 22
Outline Dimensions....................................................................... 23
Ordering Guide .......................................................................... 23
Automotive Products................................................................. 23
Applications....................................................................................... 1
General Description......................................................................... 1
Product Highlights ........................................................................... 1
Functional Block Diagram .............................................................. 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
SPI Timing Specifications ........................................................... 4
Absolute Maximum Ratings............................................................ 5
ESD Caution.................................................................................. 5
Pad Configuration and Function Descriptions ............................ 6
Die Bond Pad Coordinates.............................................................. 7
Typical Performance Characteristics ............................................. 8
Theory of Operation ........................................................................ 9
Circuit Description....................................................................... 9
Converter Architecture................................................................ 9
Normal Mode (Continuous Conversion Mode) ...................... 9
One-Shot Mode .......................................................................... 10
1 SPS Mode.................................................................................. 11
Shutdown Mode.......................................................................... 11
Fault Queue ................................................................................. 11
Temperature Data Format......................................................... 12
Temperature Conversion Formulas ......................................... 12
Registers........................................................................................... 13
Status Register............................................................................. 13
Configuration Register .............................................................. 14
REVISION HISTORY
6/12—Rev. 0 to Rev. A
Changed High Output Leakage Current, IOH Maximum
Parameter from 5 μA to 1 μA ....................................................... 3
1/12—Revision 0: Initial Version
Rev. A | Page 2 of 24
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