ADT7320 Datasheet, PDF (2/24 Pages) Analog Devices – ±0.25°C Accurate, 16-Bit Digital SPI Temperature Sensor

ADT7320
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
REVISION HISTORY
6/10—Revision PrA: Preliminary Version
Preliminary Technical Data
Status Register............................................................................. 14
Configuration Register .............................................................. 15
Temperature Value Register ...................................................... 16
ID Register................................................................................... 16
TCRIT Setpoint Register ............................................................... 16
THYST Setpoint Register............................................................... 17
THIGH Setpoint Register .............................................................. 17
TLOW Setpoint Register ............................................................... 17
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
Rev. PrA | Page 2 of 24