Datasheet

ADT7320 Data Sheet
Rev. 0 | Page 2 of 24
TABLE OF CONTENTS
Features .............................................................................................. 1
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
Pin Configuration and Function Descriptions ............................. 6
Typical Performance Characteristics ............................................. 7
Theory of Operation ........................................................................ 9
Circuit Information ...................................................................... 9
Converter Details.......................................................................... 9
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
Temperature Value Register ...................................................... 15
ID Register................................................................................... 15
T
CRIT
Setpoint Register ............................................................... 15
T
HYST
Setpoint Register ............................................................... 16
T
HIGH
Setpoint Register .............................................................. 16
T
LOW
Setpoint Register ............................................................... 16
Serial Interface ................................................................................ 17
SPI Command Byte .................................................................... 17
Writing Data ............................................................................... 18
Reading Data ............................................................................... 19
Interfacing to DSPs or Microcontrollers ................................. 19
Serial Interface Reset .................................................................. 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
REVISION HISTORY
12/12—Revision 0: Initial Version