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

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

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