ADT7311

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

 

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

 

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

 

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

 

Shutdown..................................................................................... 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 Peripheral 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 Monitoring........................................................... 22

 

Quick Guide to Measuring Temperature ................................ 22

 

Outline Dimensions ....................................................................... 23

 

Ordering Guide .......................................................................... 23

 

Automotive Products ................................................................. 23

 

REVISION HISTORY

9/11—Revision 0: Initial Version