sx8744emstrt Semtech Corporation, sx8744emstrt Datasheet - Page 2

• Manufacturer Part Number: sx8744emstrt
• Description: Precision Diode Digital Temperature For Up To 3 External Sensors
• Manufacturer: Semtech Corporation

Section
ACS Revision 2.91/February 2010
©2010 Semtech Corp.
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ADVANCED COMMUNICATIONS & SENSING
Table of contents
1.1.
1.2.
1.3.
1.4.
1.5.
2.1.
2.2.
3.1.
3.2.
3.3.
3.4.
3.5.
3.6.
3.7.
3.8.
3.9.
4.1.
6.1.
6.2.
6.3.
6.4.
6.5.
7.1.
7.2.
8.1.
8.2.
8.3.
8.4.
Electrical Characteristics ......................................................................................................................................... 3
Pin Configuration ..................................................................................................................................................... 6
Configuration ........................................................................................................................................................... 7
Application Note .................................................................................................................................................... 13
Power-Up Sequence and Standby Mode .............................................................................................................. 14
Serial Interface ...................................................................................................................................................... 14
Register / Memory Map ......................................................................................................................................... 16
Packaging Information ........................................................................................................................................... 20
3.5.1.
3.5.2.
3.5.3.
Sensor Temperature Definition ........................................................................................................................ 3
Absolute Maximum Ratings ............................................................................................................................. 3
Electrical Specification ..................................................................................................................................... 4
SMBus Timing Characteristics......................................................................................................................... 5
SMBus Timing Waveforms .............................................................................................................................. 5
Pinout............................................................................................................................................................... 6
Pin Description................................................................................................................................................. 6
General Presentation ....................................................................................................................................... 7
Modes .............................................................................................................................................................. 7
Differential and Single-Ended External Sensor.............................................................................................. 10
Measurement Principle .................................................................................................................................. 10
Parasitic Track Resistance Cancellation........................................................................................................ 10
Temperature Acquisition Sequence............................................................................................................... 11
Alarm.............................................................................................................................................................. 12
Temperature Data Format ............................................................................................................................. 12
Continuous Time Vs. Single Shot .................................................................................................................. 13
Typical Temperature Sensing System With A SX8743.................................................................................. 13
Register Write - Combined Format ................................................................................................................ 14
Register Write - Direct Format ....................................................................................................................... 14
Register Read - Combined Format ................................................................................................................ 15
Register Read - Direct Format ....................................................................................................................... 15
Soft Reset ...................................................................................................................................................... 15
Memory Map .................................................................................................................................................. 16
Registers Description..................................................................................................................................... 16
MLPD-W6-EP2 Package Outline Drawing..................................................................................................... 20
MLPD-W6-EP2 Land Pattern Drawing........................................................................................................... 21
Package Outline Drawing: MSOP-8............................................................................................................... 22
Land Pattern Drawing: MSOP-8 .................................................................................................................... 23
3-Point Track Resistance Cancellation ................................................................................................... 10
The Kelvin (4-wire) Track Resistance Cancellation ................................................................................ 11
Algorithmic Track Resistance Cancellation............................................................................................ 10
Page 2
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