ADT7320

Preliminary Technical Data

Rev. PrA | Page 2 of 24

TABLE OF CONTENTS

Features .............................................................................................. 1

Applications....................................................................................... 1

General Description ......................................................................... 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

Temperature Measurement ......................................................... 9

One-Shot Mode .......................................................................... 10

1 SPS Mode.................................................................................. 10

Continuous Read Mode............................................................. 12

Shutdown..................................................................................... 12

Fault Queue ................................................................................. 12

Temperature Data Format ......................................................... 13

Temperature Conversion Formulas ......................................... 13

Registers ........................................................................................... 14

Status Register............................................................................. 14

Configuration Register .............................................................. 15

Temperature Value Register ...................................................... 16

ID Register................................................................................... 16

Serial Interface ................................................................................ 18

SPI Command Byte.................................................................... 18

Writing Data ............................................................................... 19

Reading Data............................................................................... 20

Interfacing to DSPs or Microcontrollers ................................. 20

Serial Interface Reset.................................................................. 20

INT and CT Outputs...................................................................... 21

Undertemperature and Overtemperature Detection ............ 21

Applications Information .............................................................. 23

Thermal Response Time ........................................................... 23

Supply Decoupling ..................................................................... 23

Temperature Monitoring........................................................... 23

Outline Dimensions ....................................................................... 24

Ordering Guide .......................................................................... 24

REVISION HISTORY

6/10—Revision PrA: Preliminary Version