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Digital Temperature Sensor with SST Interface ADT7484A/ADT7486A
FEATURES
1 on-chip temperature sensor 1 or 2 remote temperature sensors Simple Serial Transport™ (SST™) interface Rev 1 compliant
GENERAL DESCRIPTION
The ADT7484A/ADT7486A are simple digital temperature sensors for use in PC applications with a Simple Serial Transport (SST) interface. These devices can monitor their own temperature as well as the temperature of one (ADT7484A) or two (ADT7486A) remote sensor diodes. The ADT7484A/ADT7486A are controlled by a single SST bidirectional data line. The devices are fixedaddress SST clients where the target address is chosen by the state of the two address pins, ADD0 and ADD1.
APPLICATIONS
Personal computers Portable personal devices Industrial sensor nets
FUNCTIONAL BLOCK DIAGRAM
ON-CHIP TEMPERATURE SENSOR LOCAL TEMPERATURE VALUE REGISTER
DIGITAL MUX
SST INTERFACE
SST
D1+ D1– (ADT7486A ONLY) D2+ D2– ANALOG MUX
A/D CONVERTER
REMOTE TEMPERATURE VALUE REGISTER ADDRESS SELECTION ADD1 ADD0
05198-001
ADT7484A/ ADT7486A
VDD GND
OFFSET REGISTERS
RESERVED
Figure 1.
Rev. 0
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ADT7484A/ADT7486A TABLE OF CONTENTS
Features .............................................................................................. 1 Applications....................................................................................... 1 General Description ......................................................................... 1 Functional Block Diagram .............................................................. 1 Revision History ............................................................................... 2 Specifications..................................................................................... 3 Absolute Maximum Ratings............................................................ 5 Thermal Resistance ...................................................................... 5 ESD Caution.................................................................................. 5 Pin Configurations and Functional Descriptions ........................ 6 Typical Performance Characteristics ............................................. 7 Product Description......................................................................... 9 SST Interface ....................................