View EMC1403-2-YZT-TR_3759430.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

smsc emc1403 / emc1404 datasheet revision 1.37 (01-06-10) datasheet product features emc1403 / emc1404 1c temperature sensor with beta compensation general description the emc1403 and emc1404 are high accuracy, low cost, system management bu s (smbus) temperature sensors. advanced features such as resistance error correction (rec), beta compensation (to support cpu diodes requiring the bjt/transistor model including 45nm, 65nm and 90nm processors) and automatic diode type detection combine to provide a robust solution for complex environmental monitoring applications. each device provides 1 accuracy for external diode temperatures and 2c accuracy for the internal diode temperature. the emc1403 monitors three temperature channels (two external and one internal). the emc1404 monitors four temperature channels (three external and one internal). resistance error correction automatically eliminates the temperature error caused by series resistance allowing greater flexibility in routing thermal diodes. beta compensation eliminates tem perature errors caused by low, variable beta transistors common in today's fine geometry processors. the automatic beta detection feature monitors each ex ternal diode/transistor and determines the optimum sens or settings fo r accurate temperature measurements regardless of processor technology. this frees the user from providing unique sensor configurations for each temperature monitoring application. these advanc ed features plus 1c measurement accuracy prov ide a low-cost, highly flexible and accurate solution for critical temperature monitoring applications. applications ? notebook computers ? desktop computers ? industrial ? embedded applications features ? support for diodes requiring the bjt/transistor model ? supports 45nm, 65nm, and 90nm cpu thermal diodes. ? automatically determines external diode type and optimal settings ? resistance e rror correction ? external temperature monitors ? 1c accuracy (60c < t diode < 100c) ? 0.125c resolution ? anti-parallel diodes for extra diode support ? internal temperature monitor ? 2c accuracy ? 3.3v supply voltage ? programmable temperature limits for alert and therm ? available in these lead-free rohs compliant packages ? 10-pin 3mm x 3mm dfn ? 10-pin msop ? 14-pin soic
order numbers: emc1403-1-aizl-tr for 10-pin, msop lead-free rohs compliant package emc1403-2-aizl-tr for 10-pin, msop lead-free rohs compliant package emc1403-3-aizl-tr for 10-pin, msop lead-free rohs compliant package emc1403-4-aizl-tr for 10-pin, msop lead-free rohs compliant package emc1403-1-aia-tr for 10-pin, dfn le ad-free rohs compliant package emc1403-2-aia-tr for 10-pin, dfn le ad-free rohs compliant package emc1403-3-aia-tr for 10-pin, dfn le ad-free rohs compliant package emc1403-4-aia-tr for 10-pin, dfn le ad-free rohs compliant package emc1403-1-yzt-tr for 14-pin, soic lead-free rohs compliant package EMC1403-2-YZT-TR for 14-pin, soic lead-free rohs compliant package emc1403-3-yzt-tr for 14-pin, soic lead-free rohs compliant package emc1403-4-yzt-tr for 14-pin, soic lead-free rohs compliant package emc1404-1-aizl-tr for 10-pin, msop lead-free rohs compliant package emc1404-2-aizl-tr for 10-pin, msop lead-free rohs compliant package emc1404-3-aizl-tr for 10-pin, msop lead-free rohs compliant package emc1404-4-aizl-tr for 10-pin, msop lead-free rohs compliant package note: see table 1.1, "part selection" for smbus addressing options. reel size is 4,000 pieces. this product meets the halogen maximum concentration values per iec61249-2-21 for rohs compliance and environmen tal information, please visit www.smsc.com/rohs 1c temperature sensor with beta compensation datasheet revision 1.37 (01-06-10) 2 smsc emc1403 / emc1404 datasheet 80 arkay drive, hauppauge, ny 11788 (631) 435-6000, fax (631) 273-3123 copyright ? 2010 smsc or its subsidiaries. all rights reserved. circuit diagrams and other information relating to smsc produc ts are included as a means of illustrating typical applications. consequently, complete information sufficient for construction purposes is not necessarily given. although the information has been checked and is believed to be accurate, no re sponsibility is assumed for inaccuracies. smsc reserves the right to make changes to specifications and produc t descriptions at any time without notice. contact your local sm sc sales office to obtain the latest specifications before placing your product order. the provision of this inform ation does not convey to the purchaser of the described semicond uctor devices any licenses under any patent rights or other intellectual property rights of smsc or others. all sales are expressly conditional on your agreement to the te rms and conditions of the most recently dated version of smsc's standard terms of sale agreement dated before the date of your order (the "terms of sale agreement"). the pro duct may contain design defects or errors known as anomalies which may cause the product's functions to deviate from published specifications. anomaly sheets are availab le upon request. smsc products are not designed, intended, authorized or warranted for use in any life support or other application where product failure could cause or contribute to personal injury or severe property damage. any and all such uses without prior written approval of an officer of smsc and further testing and/or modification will be fully at the risk of the customer. copies of this document or other smsc literature, as well as the terms of sale agreement, may be obtained by visiting smsc?s website at h ttp://www.smsc.com. smsc is a registered trademark of standard microsystems corporat ion (?smsc?). product names and company na mes are the trademarks of their respective holders. smsc disclaims and excludes any and all warrant ies, including without limi tation any and all implied warranties of merchantabil ity, fitness for a particular purpose, title, a nd against infringement and the like, and any and all warranties arising from any cou rse of dealing or usage of trade. in no event shall smsc be liable for any direct, incidental, indi rect, special, punitive, or cons equential damages; or for lost data, profits, savings or revenues of any kind; regardless of the form of action, whether based on contrac t; tort; negligence of smsc or others; strict liability; breach of wa rranty; or otherwise; whether or not any remedy of buyer is h eld to have failed of its essential purpose, and whether or not smsc has been advised of the possibility of such damages.
1c temperature sensor with beta compensation datasheet smsc emc1403 / emc1404 3 revision 1.37 (01-06-10) datasheet table of contents chapter 1 block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 1.1 part selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 chapter 2 pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 chapter 3 electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 3.1 absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 3.2 electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 3.3 smbus electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 chapter 4 system management bus interface protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 4.1 system management bus interface protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 4.2 write byte . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 4.3 read byte . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 4.4 send byte . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 4.5 receive byte. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 4.6 alert response address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 4.7 smbus address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 4.8 smbus timeout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 chapter 5 product description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 5.1 modes of operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 5.1.1 conversion rates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 5.1.2 dynamic averaging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 5.2 therm output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 5.3 alert output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 5.3.1 alert pin interrupt mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 5.3.2 alert pin comparator mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 5.4 beta compensation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 5.5 resistance error correction (rec) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 5.6 programmable external diode ideality factor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 5.7 diode faults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 5.8 consecutive alerts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 5.9 digital filter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 5.10 temperature monitors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 5.11 temperature measurement results and data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 5.12 anti-parallel diode connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 5.13 external diode connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 chapter 6 register description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 6.1 data read interlock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 6.2 temperature data registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 6.3 status register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 6.4 configuration register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 6.5 conversion rate register. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 6.6 limit registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 6.7 scratchpad registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 6.8 one shot register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 6.9 therm limit registers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 6.10 external diode fault register. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 6.11 channel mask register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
1c temperature sensor with beta compensation datasheet revision 1.37 (01-06-10) 4 smsc emc1403 / emc1404 datasheet 6.12 consecutive alert register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 6.13 beta configuration registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 6.14 external diode ideality factor registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 6.15 high limit status register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 6.16 low limit status register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 6.17 therm limit status register. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 6.18 filter control register. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 6.19 product id register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 6.20 smsc id register (feh) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 6.21 revision register (ffh) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 chapter 7 typical operating curves. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 chapter 8 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 8.1 package markings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49 8.1.1 emc1404-x-aizl (10-pin msop) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49 8.1.2 emc1403-x-aizl (10-pin msop) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49 8.1.3 emc1403-1-aia and emc1403-2-aia (10-pin dfn). . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 8.1.4 emc1403-yzt. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 chapter 9 revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
1c temperature sensor with beta compensation datasheet smsc emc1403 / emc1404 5 revision 1.37 (01-06-10) datasheet list of figures figure 2.1 emc1403/emc1404 pin diagram, msop-10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 figure 2.2 emc1403/emc1404 pin diagram, dfn-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 figure 2.3 emc1403/emc1404 pin diagram, soic-14 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 figure 4.1 smbus timing diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 figure 5.1 system diagram for emc1403 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 figure 5.2 system diagram for emc1404 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 figure 5.3 temperature filter step response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 figure 5.4 temperature filter impulse response. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 figure 5.5 block diagram of temperature monitoring circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 figure 5.6 diode configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 figure 8.1 10-pin msop / tssop package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 figure 8.2 10-pin dfn package drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46 figure 8.3 10-pin dfn package dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47 figure 8.4 10 pin dfn pcb footprint . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47 figure 8.5 package drawing and pcb footprint for soic-14 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 figure 8.6 package dimensions for soic-14 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
1c temperature sensor with beta compensation datasheet revision 1.37 (01-06-10) 6 smsc emc1403 / emc1404 datasheet list of tables table 1.1 part selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 table 2.1 emc1403 and emc1404 pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 table 3.1 absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 table 3.2 electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 table 3.3 smbus electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 table 4.1 protocol format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 table 4.2 write byte protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 table 4.3 read byte protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 table 4.4 send byte protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 table 4.5 receive byte protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 table 4.6 alert response address protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 table 5.1 supply current vs. conversion rate for emc1403 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 table 5.2 supply current vs. conversion rate for emc1404 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 table 5.3 temperature data format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 table 6.1 register set in hexadecimal order . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 table 6.2 temperature data registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 table 6.3 status register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 table 6.4 configuration register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 table 6.5 conversion rate register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 table 6.6 conversion rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 table 6.7 temperature limit registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 table 6.8 scratchpad register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 table 6.9 one shot register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 table 6.10 therm limit registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 table 6.11 external diode fault register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 table 6.12 channel mask register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 table 6.13 consecutive alert register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 table 6.14 consecutive alert / therm settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 table 6.15 beta configuration registers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 table 6.16 cpu beta values. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 table 6.17 ideality configuration registers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 table 6.18 ideality factor look-up table (diode model) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 table 6.19 substrate diode ideality factor look-up table (bjt model) . . . . . . . . . . . . . . . . . . . . . . . . . 39 table 6.20 high limit status register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 table 6.21 low limit status register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 table 6.22 therm limit status register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 table 6.23 filter configuration register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 table 6.24 filter settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 table 6.25 product id register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 table 6.26 manufacturer id register. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 table 6.27 revision register. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 table 9.1 customer revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
1c temperature sensor with beta compensation datasheet smsc emc1403 / emc1404 7 revision 1.37 (01-06-10) datasheet chapter 1 block diagram 1.1 part selection the emc1403 and emc1404 device configuration is highlighted below. table 1.1 part selection part number smbus address functionality product id external diodes diode 1 default configuration diode 2 default configuration other emc1403 - 1 - aizl 1001_100xb 2 detect diode w/ rec enabled detect diode w/ rec enabled software program- mable and mask- able high limits software program- mable therm limits 21h emc1403 - 2 - aizl 1001_101xb emc1403 - 3 - aizl 0011_000xb emc1403 - 4 - aizl 0101_001xb internal temp diode switching current analog mux internal temperature register digital mux digital mux limit comparator low limit registers high limit registers conversion rate register interupt masking status registers configuration register smbus interface alert therm smclk smdata dp1 dn1 v dd gnd emc1403/04 external temperature register(s) ? adc therm limit register dp2 dn2 therm hysteresis register anti-parallel diodes
1c temperature sensor with beta compensation datasheet revision 1.37 (01-06-10) 8 smsc emc1403 / emc1404 datasheet note 1.1 external 2 and external 3 channels have beta configuration hard wired to ?0111b? and rec enabled. emc1403 - 1 - aia 1001_100xb 2 detect diode w/ rec enabled detect diode w/ rec enabled software program- mable and mask- able high limits software program- mable therm limits 21h emc1403 - 2 - aia 1001_101xb emc1403 - 3 - aia 0011_000xb emc1403 - 4 - aia 0101_001xb emc1403 - 1 - yzt 1001_100xb 2 detect diode w/ rec enabled detect diode w/ rec enabled software program- mable and mask- able high limits software program- mable therm limits 21h emc1403 - 2 - yzt 1001_101xb emc1403 - 3 - yzt 0011_000xb emc1403 - 4 - yzt 0101_001xb emc1404 - 1 1001_100xb 3 detect diode w/ rec enabled fixed 2n3904 in anti- parallel diode configu- ration note 1.1 software program- mable and mask- able high limits software program- mable therm limits 25h emc1404 - 2 1001_101xb emc1404 - 3 0011_000xb emc1404 - 4 0101_001xb table 1.1 part selection (continued) part number smbus address functionality product id external diodes diode 1 default configuration diode 2 default configuration other
smdata smclk alert vdd dp1 dn1 dn2 / dp3 dp2 / dn3 therm gnd 1 2 3 4 5 10 9 8 7 6 10 9 8 7 6 smdata smclk 1 2 3 4 5 alert vdd dp1 dn1 dn2 / dp3 dp2 / dn3 therm gnd 13 12 11 10 9 smdata smclk 2 3 4 5 6 alert vdd dp1 dn1 dn2 / dp3 dp2 / dn3 therm gnd 1 7 8 14 n/c n/c n/c n/c 1c temperature sensor with beta compensation datasheet smsc emc1403 / emc1404 9 revision 1.37 (01-06-10) datasheet chapter 2 pin description figure 2.1 emc1403/emc1404 pin diagram, msop-10 figure 2.2 emc1403/emc1404 pin diagram, dfn-10 figure 2.3 emc1403/emc140 4 pin d iagram, soic-14
1c temperature sensor with beta compensation datasheet revision 1.37 (01-06-10) 10 smsc emc1403 / emc1404 datasheet application note: for the 5v tolerant pins that have a pull-up resistor (smclk, smdata, therm , and alert ), the voltage difference between vdd and the pull-up voltage must never exceed 3.6v. the pin types are described below: power - these pins are used to supply either vdd or gnd to the device. aio - analog input / output. di - digital input. od - open drain digital output. diod - digital input / open drain output. table 2.1 emc1403 and emc1404 pin description pin number 10-pin pin number 14-pin name function type n/a 1 n/c not internally connected n/a 1 2 vdd power supply power 23 dp1 external diode 1 positive (anode) connection aio 34 dn1 external diode 1 negative (cathode) connection aio 45 dp2 / dn3 external diode 2 positive (anode) connection / external diode 3 negative (cathode) connection for anti-parallel diodes aio 56 dn2 / dp3 external diode 2 negative (cathode) connection / external diode 3 positive (anode) connection for anti- parallel diodes aio n/a 7 n/c not internally connected n/a n/a 8 n/c not internally connected n/a 6 9 gnd ground power 710 therm critical therm output signal - requires pull-up resistor od (5v) 811 alert active low digital alert output signal - requires pull-up resistor od (5v) 912 smdata smbus data input/output - requires pull-up resistor diod (5v) 10 13 smclk smbus clock input - requires pull-up resistor di (5v) n/a 14 n/c not internally connected n/a
1c temperature sensor with beta compensation datasheet smsc emc1403 / emc1404 11 revision 1.37 (01-06-10) datasheet chapter 3 electrical specifications 3.1 absolute maximum ratings note: stresses at or above those listed could cause pe rmanent damage to the device. this is a stress rating only and functional operation of the devic e at any other condition above those indicated in the operation sections of this specification is not implied. when powering this device from laboratory or system power supplie s, it is important that the absolute maximum ratings not be exceeded or device failure can result. some po wer supplies exhibit voltage spikes on their outputs when the ac power is switched on or of f. in addition, voltage transients on the ac power line may appear on the dc output. if this po ssibility exists, it is suggested that a clamp circuit be used. note 3.1 for the 5v tolerant pins that have a pull-up resistor (smclk, smdata, therm , and alert ), the pull-up voltage must not exceed 3.6v when the device is unpowered. table 3.1 absolute maximum ratings description rating unit supply voltage (v dd ) -0.3 to 4.0 v voltage on 5v tolerant pins (v 5vt_pin ) -0.3 to 5.5 v voltage on 5v tolerant pins (|v 5vt_pin - v dd |) (see note 3.1 ) -0.3 to 3.6 v voltage on any other pin to ground -0.3 to v dd +0.3 v operating temperature range -40 to +125 c storage temperature range -55 to +150 c lead temperature range refer to jedec spec. j-std-020 package thermal charac teristics for msop-10 thermal resistance ( j-a ) 132.2 c/w package thermal charac teristics for soic-14 thermal resistance ( j-a )77.7c/w package thermal characteristics for dfn-10 thermal resistance ( j-a )77.1c/w esd rating, all pins hbm 2000 v
1c temperature sensor with beta compensation datasheet revision 1.37 (01-06-10) 12 smsc emc1403 / emc1404 datasheet 3.2 electrical specifications table 3.2 electri cal specifications v dd = 3.0v to 3.6v, t a = -40c to 125c, all typical values at t a = 27c unless otherwise noted. characteristic symbol min typ max units conditions dc power supply voltage v dd 3.0 3.3 3.6 v supply current i dd 430 850 ua 1 conversion / sec, dynamic averaging disabled 930 1200 ua 4 conversions / sec, dynamic averaging enabled 1120 ua > 16 conversions / sec, dynamic averaging enabled standby supply current i dd 170 230 ua device in standby mode, no smbus communications, alert and therm pins not asserted. internal temperature monitor temperature accuracy 0.25 1 c -5c < t a < 100c 2 c -40c < t a < 125c temperature resolution 0.125 c external temperature monitor temperature accuracy 0.25 1 c +20c < t diode < +110c 0c < t a < 100c 0.5 2 c -40c < t diode < 127c temperature resolution 0.125 c t conv 190 ms emc1403, default settings t conv 150 ms emc1404, default settings capacitive filter c filter 2.2 2.5 nf connected across external diode alert and therm pins output low voltage v ol 0.4 v i sink = 8ma leakage current i leak 5 ua alert and therm pins device powered or unpowered t a < 85c pull-up voltage < 3.6v
1c temperature sensor with beta compensation datasheet smsc emc1403 / emc1404 13 revision 1.37 (01-06-10) datasheet 3.3 smbus electrica l characteristics table 3.3 smbus elec trical specifications v dd = 3.0v to 3.6v, t a = -40c to 125c, all typical values are at t a = 27c unless otherwise noted. characteristic symbol min typ max units conditions smbus interface input high voltage v ih 2.0 v dd v 5v tolerant input low voltage v il -0.3 0.8 v 5v tolerant input high/low current i ih / i il 5 ua powered or unpowered ta < 85c hysteresis 420 mv input capacitance c in 5pf output low sink current i ol 8.2 15 ma smdata = 0.4v smbus timing clock frequency f smb 10 400 khz spike suppression t sp 50 ns bus free time start to stop t buf 1.3 us hold time: start t hd:sta 0.6 us setup time: start t su:sta 0.6 us setup time: stop t su:stp 0.6 us data hold time t hd:dat 0.3 us data setup time t su:dat 100 ns clock low period t low 1.3 us clock high period t high 0.6 us clock/data fall time t fall 300 ns min = 20+0.1c load ns clock/data rise time t rise 300 ns min = 20+0.1c load ns capacitive load c load 400 pf per bus line
1c temperature sensor with beta compensation datasheet revision 1.37 (01-06-10) 14 smsc emc1403 / emc1404 datasheet chapter 4 system management bus interface protocol 4.1 system management bus interface protocol the emc1403 and emc1404 communicate with a host controller, such as an smsc sio, through the smbus. the smbus is a two-wire serial communicat ion protocol between a computer host and its peripheral devices. a detailed timing diagram is shown in figure 4.1 . for the first 15ms after power-up the device may not respond to smbus communications. . the emc1403 and emc1404 are smbus 2.0 compatib le and support send byte, read byte, write byte, receive byte, and the alert response address as valid protocols as shown below. all of the below protocols use the convention in ta b l e 4.1 . attempting to communicate with the emc1403 and emc1404 smbus interface with an invalid slave address or invalid protocol will result in no response from the device and will not affect its register contents. stretching of the smclk signal is suppo rted, provided other devi ces on the smbus control the timing. figure 4.1 smbus timing diagram table 4.1 protocol format data sent to device data sent to the host # of bits sent # of bits sent smdta smclk t low t rise t high t fall t buf t hd:sta p s s - start condition p - stop condition t hd:dat t su:dat t su:sta t hd:sta p t su:sto s
1c temperature sensor with beta compensation datasheet smsc emc1403 / emc1404 15 revision 1.37 (01-06-10) datasheet 4.2 write byte the write byte is used to write one byte of data to the registers as shown below table 4.2 : 4.3 read byte the read byte protocol is used to read one byte of data from the registers as shown in table 4.3 . 4.4 send byte the send byte protocol is used to set the internal address register pointer to the correct address location. no data is transferred during the send byte protocol as shown in ta b l e 4.4 . 4.5 receive byte the receive byte protocol is used to read data from a register when the internal register address pointer is known to be at the right location (e.g. se t via send byte). this is used for consecutive reads of the same register as shown in ta b l e 4.5 . 4.6 alert response address the alert output can be used as a proce ssor interrupt or as an smbus alert. when it detects that the alert pin is asserted, the host will send the alert response address (ara) to the general address of 0001_100xb. all devices with active interrupts will respond with their client address as shown in table 4.6 . table 4.2 write byte protocol start slave address wr ack register address ack register data ack stop 1 -> 0 1001_100 0 0 xxh 0 xxh 0 0 -> 1 table 4.3 read byte protocol start slave address wr ack register address ack start slave address rd ack register data nack stop 1 -> 0 1001_100 0 1 xxh 0 1 -> 0 1001_100 1 1 xx 1 0 -> 1 table 4.4 send byte protocol start slave address wr ack register address ack stop 1 -> 0 1001_100 0 0 xxh 0 0 -> 1 table 4.5 receive byte protocol start slave address rd ack register data nack stop 1 -> 0 1001_100 1 0 xxh 1 0 -> 1
1c temperature sensor with beta compensation datasheet revision 1.37 (01-06-10) 16 smsc emc1403 / emc1404 datasheet the emc1403 and emc1404 will respond to the ara in the following way: 1. send slave address and verify that full slav e address was sent (i.e. the smbus communication from the device was not prematurely stopped due to a bus contention event). 2. set the mask bit to clear the alert pin. application note: the ara does not clear the status register and if the mask bit is cleared prior to the status register being cleared, the alert pin will be reasserted. 4.7 smbus address the emc1403 and emc1404 respond to hard-wired smbus slave address as shown in ta b l e 1.1 . note: other addresses are available. contact smsc for more information. 4.8 smbus timeout the emc1403 and emc1404 support smbus timeout. if the clock line is held low for longer than 30ms, the device will reset its smbus protocol. this function can be enabled by setting the timeout bit in the consecutive alert register (see section 6.12 ). table 4.6 alert response address protocol start alert response address rd ack device address nack stop 1 -> 0 0001_100 1 0 1001_1000 1 0 -> 1
1c temperature sensor with beta compensation datasheet smsc emc1403 / emc1404 17 revision 1.37 (01-06-10) datasheet chapter 5 product description the emc1403 and emc1404 are smbus temperature s ensors. the emc1403 monitors one internal diode and two externally connected temperature diodes. the emc1404 monitors one internal diode and three externally conne cted temperature diodes. thermal management is performed in cooperation with a host device. this consists of the host reading the temperature data of both the external and internal temperature diodes of the emc1403 and emc1404 and using that data to cont rol the speed of one or more fans. the emc1403 and emc1404 have two levels of monitoring. the first provides a maskable alert signal to the host when the measured temperatur es exceeds user programmable limits. this allows the emc1403 or emc1404 to be used as an independent thermal watchdog to warn the host of temperature hot spots without direct control by the host. the sec ond level of monitoring provides a non maskable interrupt on the therm pin if the measured temperat ures meet or exceed a second programmable limit. since the emc1403 and emc1404 automatically co rrect for temperature e rrors due to series resistance in temperature diode lines, there is greate r flexibility in where external diodes are positioned and better measurement accuracy t han previously available with non-resistance error correcting devices. the automatic beta detection feature mean s that there is no need to program the device according to which type of diode is present on the external diode 1 channel. this also includes cpu diodes that require the transistor or bjt model fo r monitoring their temper ature. therefore, the emc1403/emc1404 can power up ready to operate for any system configuration. for the emc1404, external diode channels 2 and 3 are only compatible with general purpose diodes (such as a 2n3904). figure 5.1 shows a system level block diagram of the emc1403. figure 5.2 shows a system level block diagram of the emc1404. figure 5.1 system diagram for emc1403 cpu emc1403 host dp1 dn1 smdata thermal diode internal diode dn2 dp2 smclk smbus interface therm alert power control
1c temperature sensor with beta compensation datasheet revision 1.37 (01-06-10) 18 smsc emc1403 / emc1404 datasheet 5.1 modes of operation the emc1403 and emc1404 have two modes of operation. ? active (run) - in this mode of operation, the a dc is converting on all temperature channels at the programmed conversion rate. the temperature data is updated at the end of every conversion and the limits are checked. in active mode, writ ing to the one-shot register will do nothing. ? standby (stop) - in this mode of operation, the majority of circuitry is powered down to reduce supply current. the temperature data is not updated and the limits are not checked. in this mode of operation, the smbus is fully active and the pa rt will return requested data. writing to the one- shot register will enable the device to update a ll temperature channels. once all the channels are updated, the device will return to the standby mode. 5.1.1 conversion rates the emc1403 and emc1404 may be configured for different conversion rates based on the system requirements. the conversion rate is configured as described in section 6.5 . the default conversion rate is 4 conversions per second. other available conversion rates are shown in ta b l e 6.6 . 5.1.2 dynamic averaging dynamic averaging causes the emc1403 and emc140 4 to measure the external diode channels for an extended time based on the selected conversion rate. this functionality can be disabled for increased power savings at the lower conversion rates (see section 6.4 ). when dynamic averaging is enabled, the device will automatically adjust the sampling and measurement time for the external diode channels. this allows the device to average 2x or 16x longer than the normal 11 bit operation (nominally 21ms per channel) while still maintaining the selected conversion rate. the benefits of dynamic averaging are impr oved noise rejection due to the longer integration time as well as less random variation of the temperature measurement. when enabled, the dynamic averaging applies when a one-shot command is issued. the device will perform the desired averaging during the one-shot operation according to the selected conversion rate. when enabled, the dynamic averaging will affect the average supply current based on the chosen conversion rate as shown in ta b l e 5.1 for emc1403. figure 5.2 system diagram for emc1404 cpu emc1404 host dp1 dn1 smdata thermal diode internal diode dn2 dp2 smclk smbus interface therm alert power control anti-parallel diodes
1c temperature sensor with beta compensation datasheet smsc emc1403 / emc1404 19 revision 1.37 (01-06-10) datasheet when enabled, the dynamic averaging will affect the average supply current based on the chosen conversion rate as shown in ta b l e 5.2 for emc1404. table 5.1 supply current vs. conversion rate for emc1403 conversion rate average supply current averaging factor (based on 11-bit operation) enabled (default) disabled enabled (default) disabled 1 / 16 sec 660ua 430ua 16x 1x 1 / 8 sec 660ua 430ua 16x 1x 1 / 4 sec 660ua 430ua 16x 1x 1 / 2 sec 660ua 430ua 16x 1x 1 / sec 660ua 430ua 16x 1x 2 / sec 930ua 475ua 8x 1x 4 / sec (default) 950ua 510ua 4x 1x 8 / sec 1010ua 630ua 2x 1x 16 / sec 1020ua 775ua 1x 1x 32 / sec 1050ua 1050ua 0.5x 0.5x 64 / sec 1100ua 1100ua 0.25x 0.25x table 5.2 supply current vs. conversion rate for emc1404 conversion rate average supply current averaging factor (based on 11-bit operation) enabled (default) disabled enabled (default) disabled 1 / 16 sec 660ua 430ua 16x 1x 1 / 8 sec 660ua 430ua 16x 1x 1 / 4 sec 660ua 430ua 16x 1x 1 / 2 sec 660ua 430ua 16x 1x 1 / sec 660ua 430ua 8x 1x 2 / sec 930ua 475ua 4x 1x 4 / sec (default) 950ua 510ua 2x 1x 8 / sec 1010ua 630ua 1x 1x 16 / sec 1020ua 775ua 0.5x 0.5x 32 / sec 1050ua 1050ua 0.25x 0.25x 64 / sec 1100ua 1100ua 0.125x 0.125x
1c temperature sensor with beta compensation datasheet revision 1.37 (01-06-10) 20 smsc emc1403 / emc1404 datasheet 5.2 therm output the therm output is asserted independently of the alert output and cannot be masked. whenever any of the measured temperatures exceed the user programmed therm limit values for the programmed number of cons ecutive measurements, the therm output is asserted. once it has been asserted, it will remain asserted until all measured temperatures drop below the therm limit minus the therm hysteresis (also programmable). when the therm pin is asserted, the therm status bits will likewise be set. reading these bits will not clear them until the therm pin is deasserted. once the therm pin is deasserted, the therm status bits will be automatically cleared. 5.3 alert output the alert pin is an open drain output and requires a pull-up resistor to v dd and has two modes of operation: interrupt mode and comparator mode. the mode of the alert output is selected via the alert / comp bit in the configuration register (see section 6.4 ). 5.3.1 alert pin interrupt mode when configured to operate in interrupt mode, the alert pin asserts low when an out of limit measurement ( > high limit or < low limit) is detected on any diode or when a di ode fault is detected. the alert pin will remain asserted as long as an out-of -limit condition remains. once the ou t-of-limit condition has been removed, the alert pin will remain asserted until the appropriate status bits are cleared. the alert pin can be masked by sett ing the mask bit. once the alert pin has been masked, it will be de-asserted and remain de -asserted until the mask bit is cleared by the user. any interrupt conditions that occur while the alert pin is masked will update the status register normally. the alert pin is used as an interrupt signal or as an smbus alert signal that allows an smbus slave to communicate an error condition to the master. one or more alert outputs can be hard-wired together. 5.3.2 alert pin comparator mode when the alert pin is configured to operate in comp arator mode it will be asserted if any of the measured temperatures exceeds the respective high limit. the alert pin will remain asserted until all temperatures drop below the corresponding high limit minus the therm hysteresis value. when the alert pin is asserted in comparator mode, the corresponding high limit status bits will be set. reading these bits will not clear them until the alert pin is deasserted. once the alert pin is deasserted, the status bits will be automatically cleared. the mask bit will not block the alert pin in this mode, however the individual channel masks (see section 6.11 ) will prevent the respective channel from asserting the alert pin. 5.4 beta compensation the emc1403 and emc1404 are configured to monitor the temperature of basic diodes (e.g. 2n3904), or cpu thermal diodes. it automatically detects the type of external diode (cpu diode or diode connected transistor) and determines the optimal se tting to reduce temperatur e errors introduced by beta variation for the external diode 1 channel only. compensating for this error is also known as implementing the transistor or bjt model for temperature measurement. for discrete transistors configured with the collector and base shorted together, the beta is generally sufficiently high such that the percent change in bet a variation is very small. for example, a 10% variation in beta for two forced emitter currents with a transistor whose ideal beta is 50 would contribute approximately 0.25c error at 100c. however for s ubstrate transistors where the base-emitter junction is used for temperature measurement and the collector is tied to the substrat e, the proportional beta variation will cause large error. for example, a 10% variation in beta for two forced emitter currents with a transistor whose ideal beta is 0.5 would contribute approximately 8.25c error at 100c. the external diode 2 and external diode 3 channels do not support beta compensation.
1c temperature sensor with beta compensation datasheet smsc emc1403 / emc1404 21 revision 1.37 (01-06-10) datasheet 5.5 resistance e rror correction (rec) parasitic resistance in series with the external diodes will limit the accuracy obtainable from temperature measurement devices. the voltage devel oped across this resistance by the switching diode currents cause the temperat ure measurement to read highe r than the true temperature. contributors to series resistance are pcb trace resistance, on die (i.e. on the processor) metal resistance, bulk resistance in the base and emitter of the temperature transistor. typically, the error caused by series resistance is +0.7c per ohm. the emc1403 and emc1404 automatically correct up to 100 ohms of series resistance. 5.6 programmable extern al diode ideality factor the emc1403 and emc1404 is designed for external diodes with an ideality factor of 1.008. not all external diodes, processor or discrete, will have this ex act value. this variation of the ideality factor introduces error in the temperat ure measurement which must be co rrected for. this correction is typically done using programmable offset register s. since an ideality factor mismatch introduces an error that is a function of temper ature, this correction is only accurate within a small range of temperatures. to provide maximum flexibility to the user, the emc1403 and emc1404 provides a 6- bit register for each external diode where the ideal ity factor of the diode used is programmed to eliminate errors across all temperatures. application note: when monitoring a substrate transistor or cp u diode and beta compensation is enabled, the ideality factor should not be adjusted. beta compensation automatically corrects for most ideality errors. 5.7 diode faults the emc1403 and emc1404 detect an open on the dp and dn pins, and a short across the dp and dn pins. for each temperature measurement made, the device checks for a diode fault on the external diode channel(s). when a diode fault is detected, the alert pin asserts (unless masked, see section 5.8 ) and the temperature data reads 00h in the msb and lsb registers (note: the low limit will not be checked). a diode fault is defined as one of the following: an open between dp and dn, a short from v dd to dp, or a short from v dd to dn. if a short occurs across dp and dn or a short occurs from dp to gnd, the low limit status bit is set and the alert pin asserts (unless masked). this c ondition is indistinguishable from a temperature measurement of 0.000degc (-64c in extended range) re sulting in temperature data of 00h in the msb and lsb registers. if a short from dn to gnd occurs (with a diode connected), temperature m easurements will continue as normal with no alerts. 5.8 consecutive alerts the emc1403 and emc1404 contain multiple consecutive alert counters. one set of counters applies to the alert pin and the second set of counters applies to the therm pin. each temperature measurement channel has a separate cons ecutive alert counter for each of the alert and therm pins. all counters are user programmable and de termine the number of cons ecutive measurements that a temperature channel(s) must be out-of-limit or reporting a diode fault before the corresponding pin is asserted. see section 6.12 for more details on the consecutive alert function. 5.9 digital filter to reduce the effect of noise and temperature spik es on the reported temperat ure, the external diode 1 channel uses a programmable digita l filter. this filter can be conf igured as level 1, level 2, or disabled. the typical filter performance is shown in figure 5.3 and figure 5.4 .
1c temperature sensor with beta compensation datasheet revision 1.37 (01-06-10) 22 smsc emc1403 / emc1404 datasheet figure 5.3 temperature filter step response figure 5.4 temperature filter impulse response filter step response 0 10 20 30 40 50 60 70 80 90 0 2 4 6 8 101214 sample s temperature (c) disabled level1 level2 filter impulse response 0 10 20 30 40 50 60 70 80 90 0 2 4 6 8 10 12 14 samples temperature (c) disabled level1 level2
1c temperature sensor with beta compensation datasheet smsc emc1403 / emc1404 23 revision 1.37 (01-06-10) datasheet 5.10 temperature monitors in general, thermal diode temperat ure measurements are based on the change in forward bias voltage of a diode when operated at two different currents. this v be is proportional to absolute temperature as shown in the following equation: figure 5.5 shows a block diagram of t he temperature measurement circuit. the negative terminal for the remote temperature diode, dn, is internally biased with a forward diode voltage referenced to ground. 5.11 temperature meas urement results and data the temperature measurement results are stored in the internal and external temperature registers. these are then compared with the values stored in the high and low limit registers. both external and internal temperature measurements ar e stored in 11-bit format with the eight (8) most significant bits stored in a high byte register and the three (3) l east significant bits stored in the three (3) msb positions of the low byte regist er. all other bits of the low byte register are set to zero. the emc1403 and emc1404 have two selectable temp erature ranges. the default range is from 0c to +127c and the temperature is r epresented as binary number able to report a temperature from 0c to +127.875c in 0.125c steps. the extended range is an extended temperature ra nge from -64c to +191c. the data format is a binary number offset by 64c. the extended range is used to measure temperature diodes with a large known offset (such as amd processor diodes) wher e the diode temperature plus the offset would be equivalent to a temperature higher than +127c. table 5.3 shows the default and extended range formats. where: k = boltzmann?s constant t = absolute temperature in kelvin [1] q = electron charge = diode ideality factor figure 5.5 block diagram of te mperature monitoring circuit ? ? ? ? ? ? ? ? = low high be i i q kt v ln dp dn anti- aliasing filter ? adc resistance error correction substrate pnp i low i high
1c temperature sensor with beta compensation datasheet revision 1.37 (01-06-10) 24 smsc emc1403 / emc1404 datasheet note 5.1 in default mode, all temperatures < 0c will be reported as 0c. note 5.2 in the extended range, all temperatur es < -64c will be reported as -64c. note 5.3 for the default range, all temperatures > + 127.875c will be reported as +127.875c. note 5.4 for the extended range, all temperatures > +191.875c wil l be reported as +191.875c. 5.12 anti-parallel diode connections the emc1404 supports reading two external diodes on the same set of pins (dp2, dn2). these diodes are connected as shown in figure 5.2 . due to the anti-parallel c onnection of thes e diodes, both diodes will be reverse biased by a v be voltage (approximately 0.7v). because of this reverse bias, only discrete thermal diodes (such as a 2n3904) are recommended to be placed on these pins. 5.13 external diode connections the emc1403 can be configured to measure a cpu s ubstrate transistor, a discrete 2n3904 thermal diode, or an amd processor diode. the diodes can be connected in a variety of ways as indicated in figure 5.6 . the emc1404 can be configured to measure a cpu s ubstrate transistor, a discrete 2n3904 thermal diode, or an amd processor diode on the external diode 1 channel only. the external diode 2 and external diode 3 channels are confi gured to measure a pair of discret e anti-parallel diodes (shared on pins dp2 and dn2). the supported configurations for the external diode channels are shown in figure 5.6 . table 5.3 temperature data format temperature (c) default range 0c to 127c extende d range -64c to 191c diode fault 000 0000 0000 000 0000 0000 -64 000 0000 0000 000 0000 0000 note 5.2 -1 000 0000 0000 001 1111 1000 0 000 0000 0000 note 5.1 010 0000 0000 0.125 000 0000 0001 010 0000 0001 1 000 0000 1000 010 0000 1000 64 010 0000 0000 100 0000 0000 65 010 0000 1000 100 0000 1000 127 011 1111 1000 101 1111 1000 127.875 011 1111 1111 101 1111 1111 128 011 1111 1111 note 5.3 110 0000 0000 190 011 1111 1111 111 1111 0000 191 011 1111 1111 111 1111 1000 >= 191.875 011 1111 1111 111 1111 1111 note 5.4
1c temperature sensor with beta compensation datasheet smsc emc1403 / emc1404 25 revision 1.37 (01-06-10) datasheet figure 5.6 diode configurations local ground to dp typical remote substrate transistor i.e. cpu substrate pnp typical remote discrete pnp transistor i.e. 2n3906 typical remote discrete npn transistor i.e. 2n3904 to dn to dp to dn to dp to dn
1c temperature sensor with beta compensation datasheet revision 1.37 (01-06-10) 26 smsc emc1403 / emc1404 datasheet chapter 6 register description the registers shown in ta b l e 6.1 are accessible through the smbus. an entry of ?-? indicates that the bit is not used and will always read ?0?. table 6.1 register set in hexadecimal order register address r/w register name function default value page 00h r internal diode data high byte stores the integer data for the internal diode 00h page 29 01h r external diode 1 data high byte stores the integer data for external diode 1 00h 02h r status stores the status bits for the internal diode and external diodes 00h page 30 03h r/w configuration controls the general operation of the device (mirrored at address 09h) 00h page 30 04h r/w conversion rate controls the conversion rate for updating temperature data (mirrored at address 0ah) 06h (4/sec) page 31 05h r/w internal diode high limit stores the 8-bit high limit for the internal diode (mirrored at address 0bh) 55h (85c) page 32 06h r/w internal diode low limit stores the 8-bit low limit for the internal diode (mirrored at address 0ch) 00h (0c) 07h r/w external diode 1 high limit high byte stores the integer portion of the high limit for external diode 1 (mirrored at register 0dh) 55h (85c) 08h r/w external diode 1 low limit high byte stores the integer portion of the low limit for external diode 1 (mirrored at register 0eh) 00h (0c) 09h r/w configuration controls the general operation of the device (mirrored at address 03h) 00h page 30 0ah r/w conversion rate controls the conversion rate for updating temperature data (mirrored at address 04h) 06h (4/sec) page 31
1c temperature sensor with beta compensation datasheet smsc emc1403 / emc1404 27 revision 1.37 (01-06-10) datasheet 0bh r/w internal diode high limit stores the 8-bit high limit for the internal diode (mirrored at address 05h) 55h (85c) page 32 0ch r/w internal diode low limit stores the 8-bit low limit for the internal diode (mirrored at address 06h) 00h (0c) 0dh r/w external diode 1 high limit high byte stores the integer portion of the high limit for external diode 1 (mirrored at register 07h) 55h (85c) 0eh r/w external diode 1 low limit high byte stores the integer portion of the low limit for external diode 1 (mirrored at register 08h) 00h (0c) 0fh w one shot a write to this register initiates a one shot update. 00h page 34 10h r external diode 1 data low byte stores the fractional data for external diode 1 00h page 29 11h r/w scratchpad scratchpad register for software compatibility 00h page 33 12h r/w scratchpad scratchpad register for software compatibility 00h page 33 13h r/w external diode 1 high limit low byte stores the fractional portion of the high limit for external diode 1 00h page 32 14h r/w external diode 1 low limit low byte stores the fractional portion of the low limit for external diode 1 00h 15h r/w external diode 2 high limit high byte stores the integer portion of the high limit for external diode 2 55h (85c) page 32 16h r/w external diode 2 low limit high byte stores the integer portion of the low limit for external diode 2 00h (0c) 17h r/w external diode 2 high limit low byte stores the fractional portion of the high limit external diode 2 00h page 32 18h r/w external diode 2 low limit low byte stores the fractional portion of the low limit for external diode 2 00h 19h r/w external diode 1 therm limit stores the 8-bit critical temperature limit for external diode 1 55h (85c) page 34 1ah r/w external diode 2 therm limit stores the 8-bit critical temperature limit for external diode 2 55h (85c) page 34 1bh r-c external diode fault stores status bits indicating which external diode detected a diode fault 00h page 35 1fh r/w channel mask register controls the masking of individual channels 00h page 35 table 6.1 register set in hexadecimal order (continued) register address r/w register name function default value page
1c temperature sensor with beta compensation datasheet revision 1.37 (01-06-10) 28 smsc emc1403 / emc1404 datasheet 20h r/w internal diode therm limit stores the 8-bit critical temperature limit for the internal diode 55h (85c) page 34 21h r/w therm hysteresis stores the 8-bit hysteresis value that applies to all therm limits 0ah (10c) 22h r/w consecutive alert controls the number of out-of-limit conditions that must occur before an interrupt is asserted 70h page 36 23h r external diode 2 data high byte stores the integer data for external diode 2 00h page 29 24h r external diode 2 data low byte stores the fractional data for external diode 2 00h 25h r/w external diode 1 beta configuration stores the beta compensation circuitry settings for external diode 1 08h page 37 26h r/w external diode 2 beta configuration stores the beta compensation circuitry settings for external diode 2 08h or 07h page 37 27h r/w external diode 1 ideality factor stores the ideality factor for external diode 1 12h (1.008) page 38 28h r/w external diode 2 ideality factor stores the ideality factor for external diode 2 12h (1.008) page 38 29h r internal diode data low byte stores the fractional data for the internal diode 00h page 29 2ah r external diode 3 high byte stores the integer data for external diode 3 00h page 29 2bh r external diode 3 low byte stores the fractional data for external diode 3 00h 2ch r/w external diode 3 high limit high byte stores the integer portion of the high limit for external diode 3 55h (85c) page 32 2dh r/w external diode 3 low limit high byte stores the integer portion of the low limit for external diode 3 00h (0c) 2eh r/w external diode 3 high limit low byte stores the fractional portion of the high limit for external diode 3 00h 2fh r/w external diode 3 low limit low byte stores the fractional portion of the low limit for external diode 3 00h 30h r/w external diode 3 therm limit stores the 8-bit critical temperature limit for external diode 3 55h (85c) page 34 31h r/w external diode 3 ideality factor stores the ideality factor for external diode 3 12h (1.008) page 38 35h r-c high limit status status bits for the high limits 00h page 40 36h r-c low limit status status bits for the low limits 00h page 40 37h r therm limit status status bits for the therm limits 00h page 41 table 6.1 register set in hexadecimal order (continued) register address r/w register name function default value page
1c temperature sensor with beta compensation datasheet smsc emc1403 / emc1404 29 revision 1.37 (01-06-10) datasheet 6.1 data read interlock when any temperature channel high byte register is read, the corresponding low byte is copied into an internal ?shadow? register. the user is free to r ead the low byte at any time and be guaranteed that it will correspond to the previously read high byte. regardless if the low byte is read or not, reading from the same high byte register again will auto matically refresh this stored low byte data. 6.2 temperature data registers as shown in ta b l e 6.2 , all temperatures are stored as an 11-bit value with the high byte representing the integer value and the low byte representing the fr actional value left justified to occupy the msbits. 40h r/w filter control controls the digital filter setting for the external diode 1 channel 00h page 41 fdh r product id stores a fixed value that identifies each product table 6.25 page 42 feh r smsc id stores a fixed value that represents smsc 5dh page 42 ffh r revision stores a fixed value that represents the revision number 01h page 42 table 6.2 temperature data registers addr r/w register b7 b6 b5 b4 b3 b2 b1 b0 default 00h r internal diode high byte 128 64 32 16 8 4 2 1 00h 29h r internal diode low byte 0.5 0.25 0.125 - - - - - 00h 01h r external diode 1 high byte 128 64 32 16 8 4 2 1 00h 10h r external diode 1 low byte 0.5 0.25 0.125 - - - - - 00h 23h r external diode 2 high byte 128 64 32 16 8 4 2 1 00h 24h r external diode 2 low byte 0.5 0.25 0.125 - - - - - 00h 2ah r external diode 3 high byte 128 64 32 16 8 4 2 1 00h 2bh r external diode 3 low byte 0.5 0.25 0.125 - - - - - 00h table 6.1 register set in hexadecimal order (continued) register address r/w register name function default value page
1c temperature sensor with beta compensation datasheet revision 1.37 (01-06-10) 30 smsc emc1403 / emc1404 datasheet 6.3 status register the status register reports general error conditi ons. to identify specific channels, refer to section 6.10 , section 6.15 , section 6.16 , and section 6.17 . the individual status register bits are cleared when the appropriate high limit, low limit, or therm limit register has been read or cleared. bit 7 - busy - this bit indicates that the adc is cu rrently converting. this bi t does not cause either the alert or therm pins to be asserted. bit 4 - high - this bit is set when any of the temp erature channels exceeds its programmed high limit. see the high limit status register for specific channel information ( section 6.15 ). when set, this bit will assert the alert pin. bit 3 - low - this bit is set when any of the temperature channels drops below its programmed low limit. see the low limit status register for specific channel information ( section 6.16 ). when set, this bit will assert the alert pin. bit 2 - fault - this bit is asserted when a diode fault is detected on any of the external diode channels. see the external diode fault regi ster for specific channel information ( section 6.10 ). when set, this bit will assert the alert pin. bit 1 - therm - this bit is set when the any of the temperature channels exceeds its programmed therm limit. see the therm limit status r egister for specific channel information ( section 6.17 ). when set, this bit will assert the therm pin. 6.4 configuration register the configuration register controls the basic operati on of the device. this register is fully accessible at either address. bit 7 - mask_all - masks the alert pin from asserting. ? ?0? (default) - the alert pin is not masked. if any of the appropriate status bits are set the alert pin will be asserted. ? ?1? - the alert pin is masked. it will not be asserted for any interrupt condition unless it is configured as a secondary therm pin. the status registers will be updated normally. bit 6 - run / stop - controls active/standby modes. ? ?0? (default) - the device is in acti ve mode and converting on all channels. ? ?1? -the device is in standby mode and not converting. bit 5 - alert/comp - controls the operation of the alert pin. ? ?0? (default) - the alert pin acts as described in section 5.3 . ? ?1? - the alert pin acts in comparator mode as described in section 5.3.2 . in this mode the mask_all bit is ignored. table 6.3 status register addr r/w register b7 b6 b5 b4 b3 b2 b1 b0 default 02h r status busy - - high low fault therm - 00h table 6.4 configuration register addr r/w register b7 b6 b5 b4 b3 b2 b1 b0 default 03h r/w configuration mask_ all run/ stop alert/ comp recd1 recd2 range davg_ dis - apdd 00h 09h
1c temperature sensor with beta compensation datasheet smsc emc1403 / emc1404 31 revision 1.37 (01-06-10) datasheet bit 4 - recd1 - disables the resistance error correction (rec) for external diode 1. ? ?0? (default)- rec is enabled for external diode 1. ? ?1? - rec is disabled for external diode 1. bit 3 - recd2 - disables the resistance error co rrection (rec) for external diode 2 and external diode 3. ? ?0? (default) - rec is enabled for external diode 2 and external diode 3. ? ?1? - rec is disabled for external diode 2 and external diode 3. bit 2 - range - configures the measurement range and data format of the temperature channels. ? ?0? (default) - the temperature measurement range is 0c to +127.875c and the data format is binary. ? ?1? -the temperature measuremen t range is -64c to +191.875c and the data format is offset binary (see table 5.3 ). bit 1 - davg_dis - disables the dynamic av eraging feature on all temperature channels. ? ?0? (default) - the dynamic averaging feature is enabled. all temperature c hannels will be converted with an averaging factor that is based on the conversion rate as shown in table 5.1 and table 5.2 . ? ?1? - the dynamic averaging featur e is disabled. all temperature channels will be converted with a maximum averaging factor of 1x (equivalent to 11-bit conversion). for higher conversion rates, this averaging factor will be reduced as shown in table 5.1 and table 5.2 . bit 0 - apdd (emc1404 only) - disables the anti-parallel diode operation. beta compensation is disabled on external diode 2 and 3 regardless of apdd setting. in addition, external diode 2 beta configuration register will be ignored. ? ?0? (default) - anti-parallel diode mode is enabled. two external diodes will be measured on the dp2 and dn2 pins. ? ?1? - anti-parallel diode mode is disabled. only one external diode will be measured on the dp2 and dn2 pins. 6.5 conversion rate register the conversion rate register controls how ofte n the temperature measurement channels are updated and compared against the limits. this register is fully accessible at either address. bits 3-0 - conv[3:0] - determines the conversion rate as shown in ta b l e 6.6 . table 6.5 conversion rate register addr r/w register b7 b6 b5 b4 b3 b2 b1 b0 default 04h r/w conversion rate - - - - conv[3:0] 06h (4/sec) 0ah table 6.6 conversion rate conv[3:0] conversions / second hex 3 2 1 0 0h 0 0 0 0 1 / 16 1h 0 0 0 1 1 / 8 2h 0 0 1 0 1 / 4
1c temperature sensor with beta compensation datasheet revision 1.37 (01-06-10) 32 smsc emc1403 / emc1404 datasheet 6.6 limit registers 3h 0 0 1 1 1 / 2 4h 0 1 0 0 1 5h 0 1 0 1 2 6h 0 1 1 0 4 (default) 7h 0 1 1 1 8 8h 1 0 0 0 16 9h 1 0 0 1 32 ah 1 0 1 0 64 bh - fh all others 1 table 6.7 temperature limit registers addr. r/w register b7 b6 b5 b4 b3 b2 b1 b0 default 05h r/w internal diode high limit 128643216 8 42 1 55h (85c) 0bh 06h r/w internal diode low limit 128643216 8 42 1 00h (0c) 0ch 07h r/w external diode 1 high limit high byte 128643216 8 42 1 55h (85c) 0dh 13h r/w external diode 1 high limit low byte 0.5 0.25 0.125 - - - - - 00h 08h r/w external diode 1 low limit high byte 128643216 8 42 1 00h (0c) 0eh 14h r/w external diode 1 low limit low byte 0.5 0.25 0.125 - - - - - 00h 15h r/w external diode 2 high limit high byte 128643216 8 42 1 55h (85c) table 6.6 conversion rate (continued) conv[3:0] conversions / second hex 3 2 1 0
1c temperature sensor with beta compensation datasheet smsc emc1403 / emc1404 33 revision 1.37 (01-06-10) datasheet the device contains both high and low limits for al l temperature channels. if the measured temperature exceeds the high limit, then the corr esponding status bit is set and the alert pin is asserted. likewise, if the measured temperature is less than or equal to the low limit, the corresponding status bit is set and the alert pin is asserted. the data format for the limits must match the select ed data format for the temp erature so that if the extended temperature range is used, the limits mu st be programmed in the extended data format. the limit registers with multiple addresses are fully accessible at either address. when the device is in standby mode, updating the li mit registers will have no affect until the next conversion cycle occurs. this can be initiated via a write to the one shot register or by clearing the run / stop bit in the configuration register (see section 6.4 ). 6.7 scratchpad registers 16h r/w external diode 2 low limit high byte 128643216 8 42 1 00h (0c) 17h r/w external diode 2 high limit low byte 0.5 0.25 0.125 - - - - - 00h 18h r/w external diode 2 low limit low byte 0.5 0.25 0.125 - - - - - 00h 2ch r/w external diode 3 high limit high byte 128643216 8 42 1 55h (85c) 2dh r/w external diode 3 low limit high byte 128643216 8 42 1 00h (0c) 2eh r/w external diode 3 high limit low byte 0.5 0.25 0.125 - - - - - 00h 2fh r/w external diode 3 low limit low byte 0.5 0.25 0.125 - - - - - 00h table 6.8 scratchpad register addr r/w register b7 b6 b5 b4 b3 b2 b1 b0 default 11h r/w scratchpad 7 6 5 4 3 2 1 0 00h 12h r/w scratchpad 7 6 5 4 3 2 1 0 00h table 6.7 temperature limit registers (continued) addr. r/w register b7 b6 b5 b4 b3 b2 b1 b0 default
1c temperature sensor with beta compensation datasheet revision 1.37 (01-06-10) 34 smsc emc1403 / emc1404 datasheet the scratchpad registers are read write registers that are used for place holders to be software compatible with legacy programs. reading from th e registers will return what is written to them. 6.8 one shot register the one shot register is used to initiate a one shot command. writ ing to the one shot register, when the device is in standby mode and busy bit (in status register) is ?0?, will immediately cause the adc to update all temperature me asurements. writing to the one shot register while the device is in active mode will have no affect. 6.9 therm limit registers the therm limit registers are used to determine w hether a critical thermal event has occurred. if the measured temperature exceeds the therm limit, then the therm pin is asserted. the limit setting must match the chosen data forma t of the temperature reading registers. unlike the alert pin, the therm pin cannot be masked. additionally, the therm pin will be released once the temperature drops below the corresp onding threshold minus the therm hysteresis. table 6.9 one shot register addr. r/w register b7 b6 b5 b4 b3 b2 b1 b0 default 0fh w one shot writing to this register initia tes a single conversion cycle. data is not stored and always reads 00h 00h table 6.10 therm limit registers addr. r/w register b7 b6 b5 b4 b3 b2 b1 b0 default 19h r/w external diode 1 therm limit 128 64 32 16 8 4 2 1 55h (85c) 1ah r/w external diode 2 therm limit 128 64 32 16 8 4 2 1 55h (85c) 20h r/w internal diode therm limit 128 64 32 16 8 4 2 1 55h (85c) 21h r/w therm hysteresis 128 64 32 16 8 4 2 1 0ah (10c) 30h r/w external diode 3 therm limit 128 64 32 16 8 4 2 1 55h (85c)
1c temperature sensor with beta compensation datasheet smsc emc1403 / emc1404 35 revision 1.37 (01-06-10) datasheet 6.10 external diode fault register the external diode fault register indicates which of the external diodes caused the fault bit in the status register to be set. this r egister is cleared when it is read. bit 3 - e3flt - this bit is set if the external diode 3 channel reported a diode fault. bit 2 - e2flt - this bit is set if the external diode 2 channel reported a diode fault. bit 1 - e1flt - this bit is set if the external diode 1 channel reported a diode fault. 6.11 channel mask register the channel mask register controls individual channel masking. when a channel is masked, the alert pin will not be asserted when the masked channel reads a diode fault or out of limit error. the channel mask does not mask the therm pin. bit 3 - e3mask - masks the alert pin from asserting when the external diode 3 channel is out of limit or reports a diode fault. ? ?0? (default) - the external diode 3 channel will cause the alert pin to be asserted if it is out of limit or reports a diode fault. ? ?1? - the external diode 3 channel will not cause the alert pin to be asserted if it is out of limit or reports a diode fault. bit 2 - e2mask - masks the alert pin from asserting when the external diode 2 channel is out of limit or reports a diode fault. ? ?0? (default) - the external diode 2 channel will cause the alert pin to be asserted if it is out of limit or reports a diode fault. ? ?1? - the external diode 2 channel will not cause the alert pin to be asserted if it is out of limit or reports a diode fault. bit 1 - e1mask - masks the alert pin from asserting when the external diode 1 channel is out of limit or reports a diode fault. ? ?0? (default) - the external diode 1 channel will cause the alert pin to be asserted if it is out of limit or reports a diode fault. ? ?1? - the external diode 1 channel will not cause the alert pin to be asserted if it is out of limit or reports a diode fault. bit 0 - intmask - masks the alert pin from asserting when the internal diode temperature is out of limit. ? ?0? (default) - the internal diode channel will cause the alert pin to be asserted if it is out of limit. ? ?1? - the internal diode channel will not cause the alert pin to be asserted if it is out of limit. table 6.11 external diode fault register addr. r/w register b7 b6 b5 b4 b3 b2 b1 b0 default 1bh r-c external diode fault - - - - e3flt e2flt e1flt - 00h table 6.12 channel mask register addr. r/w register b7 b6 b5 b4 b3 b2 b1 b0 default 1fh r/w channel mask ---- e3 mask e2 mask e1 mask int mask 00h
1c temperature sensor with beta compensation datasheet revision 1.37 (01-06-10) 36 smsc emc1403 / emc1404 datasheet 6.12 consecutive alert register the consecutive alert register determines how many times an out-of-limit error or diode fault must be detected in consecutiv e measurements before the alert or therm pin is asserted. additionally, the consecutive alert register contro ls the smbus timeout functionality. an out-of-limit condition (i.e. hi gh, low, or fault) occurring on the same temperature channel in consecutive measurements will increm ent the consecutive alert counter. the counters will also be reset if no out-of-limit condition or diode fault condition occurs in a consecutive reading. when the alert pin is configured as an interrupt, when the consecutive alert counter reaches its programmed value, the following will occur: the status bit(s) for that channel and the last error condition(s) (i.e. e1high, or e2low and/or e2fault) will be set to ?1?, the alert pin will be asserted, the consecutive al ert counter will be cleared, and measurements will continue. when the alert pin is configured as a comparator, the consecutive alert counter will ignore diode fault and low limit errors and only increment if the measured temperature exceeds the high limit. additionally, once the consecutive alert counter reaches the pr ogrammed limit, the alert pin will be asserted, but the counter will not be reset. it will re main set until the temperature drops below the high limit minus the therm hysteresis value. for example, if the calrt[2:0] bits are set for 4 consecutive alerts on an emc1403 device, the high limits are set at 70c, and none of the channels are masked, then the alert pin will be asserted after the following four measurements: 1. internal diode reads 71c and both external dio des read 69c. consecutiv e alert counter for int is incremented to 1. 2. both internal diode and external diode 1 read 71c and external diode 2 reads 68c. consecutive alert counter for int is incremented to 2 and for ext1 is set to 1. 3. the external diode 1 reads 71c and both the internal diode and external diode 2 read 69c. consecutive alert counter for int and ext2 are cleared and ext1 is incremented to 2. 4. the internal diode reads 71c and both external diodes read 71c. consecutive alert counter for int is set to 1, ext2 is set to 1, and ext1 is incremented to 3. 5. the internal diode reads 71c and both the exte rnal diodes read 71c. co nsecutive alert counter for int is incremented to 2, ext2 is set to 2, and ext1 is incremented to 4. the appropriate status bits are set for ext1 and the alert pin is asserted. ext1 counter is reset to 0 and all other counters hold the last value until the next temperat ure measurement. bit 7 - timeout - determines whether the smbus timeout function is enabled. ? ?0? (default) - the smbus timeout feature is disabled. the smclk line can be held low indefinitely without the device resetting its smbus protocol. ? ?1? - the smbus timeout feature is enabled. if the smclk line is held low for more than 30ms, then the device will reset the smbus protocol. bits 6-4 - cthrm[2:0] - determines the number of consecutive measurements that must exceed the corresponding therm limit before the therm pin is asserted. all temperature channels use this value to set the respective counters. the consec utive therm counter is incremented whenever any measurement exceed the corresponding therm limit. if the temperature drops below the therm limit, then the counter is reset. if a number of consecutive measurements above the therm limit occurs, then the therm pin is asserted low. table 6.13 consecutive alert register addr. r/w register b7 b6 b5 b4 b3 b2 b1 b0 default 22h r/w consecutive alert time out cthrm[2:0] calrt[2:0] - 70h
1c temperature sensor with beta compensation datasheet smsc emc1403 / emc1404 37 revision 1.37 (01-06-10) datasheet once the therm pin has been asserted, the consecutive therm counter will not reset until the corresponding temperature drops below the therm limit minus the therm hysteresis value. the bits are decoded as shown in table 6.14 . the default setting is 4 consecutive out of limit conversions. bits 3-1 - calrt[2:0] - determine the number of consecutiv e measurements that must have an out of limit condition or diode fault before the alert pin is asserted. all temperature channels use this value to set the respective counters. the bits are decoded as shown in ta b l e 6.14 . the default setting is 1 consecutive out of limit conversion. 6.13 beta configuration registers this register is used to set the beta compensation factor that is used for the external diode channels. bit 3 - enablex - enables the beta compensation factor autodetection function. this function shall be disabled for external diode 2. ? ?0? - the beta compensation factor autodetection circuitry is disabled. the external diode will always use the beta compensation factor set by the betax[2:0] bits. ? ?1? (default) - the beta compensat ion factor autodetection circuitr y is enabled. at the beginning of every conversion, the optimal beta compensatio n factor setting will be determined and applied. the betax[2:0] bits will be automatically updated to indicate the current setting. bit 2-0 - betax[2:0] - these bits always reflect the current beta configuration settings. if autodetection circuitry is enabled, then these bits will be updated aut omatically and writing to these bits will have no effect. if the autodetection circuitry is disabled, then these bits will determine the beta configuration setting that is used for their respective channels. care should be taken when setting the betax[2:0] bits when the autodetection circuitry is disabled. if the beta compensation factor is set at a beta valu e that is higher than the tr ansistor beta, then the circuit may introduce measurement errors. when measuring a discrete thermal diode (such as table 6.14 consecutive alert / therm settings 210 number of consecutive out of limit measurements 000 1 (default for calrt[2:0]) 001 2 011 3 111 4 (default for cthrm[2:0]) table 6.15 beta configuration registers addr. r/w register b7 b6 b5 b4 b3 b2 b1 b0 default 25h r/w external diode 1 beta configuration - - - - enable1 beta1[2:0] 08h 26h r/w external diode 2 beta configuration - - - - enable2 beta2[2:0] 08h for emc1403 or 07h for emc1404
1c temperature sensor with beta compensation datasheet revision 1.37 (01-06-10) 38 smsc emc1403 / emc1404 datasheet 2n3904) or a cpu diode that functions like a di screte thermal diode (suc h as an amd processor diode), then the betax[2:0] bits should be set to ?111b?. 6.14 external diode ideality factor registers these registers store the i deality factors that are applied to the external diodes. ta b l e 6.18 defines each setting and the corresponding ideality factor. beta compensation and resistance error correction automatically correct for most diode ideality errors, therefor e it is not recommended that these settings be updated without consulting smsc. table 6.16 cpu beta values hex enablex betax[2:0] minimum beta 21 0 0h 0 0 0 0 0.11 1h 0 0 0 1 0.18 2h 0 0 1 0 0.25 3h 0 0 1 1 0.33 4h 0 1 0 0 0.43 5h 0 1 0 1 1.00 6h 0 1 1 0 2.33 7h 0 1 1 1 disabled 8h - fh 1 x x x autodetection table 6.17 ideality configuration registers addr. r/w register b7 b6 b5 b4 b3 b2 b1 b0 default 27h r/w external diode 1 ideality factor - - ideality1[5:0] 12h 28h r/w external diode 2 ideality factor - - ideality2[5:0] 12h 31h r/w external diode 3 ideality factor - - ideality3[5:0] 12h
1c temperature sensor with beta compensation datasheet smsc emc1403 / emc1404 39 revision 1.37 (01-06-10) datasheet for cpu substrate transistors that require the bjt tr ansistor model, the ideality factor behaves slightly differently than for discrete diode- connected transistors. refer to table 6.19 when using a cpu substrate transistor. table 6.18 ideality factor look-up table (diode model) setting factor setting factor setting factor 08h 0.9949 18h 1.0159 28h 1.0371 09h 0.9962 19h 1.0172 29h 1.0384 0ah 0.9975 1ah 1.0185 2ah 1.0397 0bh 0.9988 1bh 1.0200 2bh 1.0410 0ch 1.0001 1ch 1.0212 2ch 1.0423 0dh 1.0014 1dh 1.0226 2dh 1.0436 0eh 1.0027 1eh 1.0239 2eh 1.0449 0fh 1.0040 1fh 1.0253 2fh 1.0462 10h 1.0053 20h 1.0267 30h 1.0475 11h 1.0066 21h 1.0280 31h 1.0488 12h 1.0080 22h 1.0293 32h 1.0501 13h 1.0093 23h 1.0306 33h 1.0514 14h 1.0106 24h 1.0319 34h 1.0527 15h 1.0119 25h 1.0332 35h 1.0540 16h 1.0133 26h 1.0345 36h 1.0553 17h 1.0146 27h 1.0358 37h 1.0566 table 6.19 substrate diode ideality factor look-up table (bjt model) setting factor setting factor setting factor 08h 0.9869 18h 1.0079 28h 1.0291 09h 0.9882 19h 1.0092 29h 1.0304 0ah 0.9895 1ah 1.0105 2ah 1.0317 0bh 0.9908 1bh 1.0120 2bh 1.0330 0ch 0.9921 1ch 1.0132 2ch 1.0343 0dh 0.9934 1dh 1.0146 2dh 1.0356 0eh 0.9947 1eh 1.0159 2eh 1.0369 0fh 0.9960 1fh 1.0173 2fh 1.0382 10h 0.9973 20h 1.0187 30h 1.0395 11h 0.9986 21h 1.0200 31h 1.0408
1c temperature sensor with beta compensation datasheet revision 1.37 (01-06-10) 40 smsc emc1403 / emc1404 datasheet application note: when measuring a 65nm intel cpus, the idealit y setting should be the default 12h. when measuring 45nm intel cpus, t he ideality setting should be 15h. 6.15 high limit status register the high limit status register contains the status bits that are set when a temperature channel high limit is exceeded. if any of these bi ts are set, then the high status bi t in the status register is set. reading from the high limit status register will clea r all bits if. reading from the register will also clear the high status bit in the status register. the alert pin will be set if the programmed number of consecutive alert counts have been met and any of these status bits are set. the status bits will remain set until read unless the alert pin is configured as a comparator output (see section 5.3.2 ). bit 3 - e3high - this bit is set when the external diode 3 channel exceeds its programmed high limit. bit 2 - e2high - this bit is set when the external diode 2 channel exceeds its programmed high limit. bit 1 - e1high - this bit is set when the external diode 1 channel exceeds its programmed high limit. bit 0 - ihigh - this bit is set when the internal diode channel exceeds its programmed high limit. 6.16 low limit status register the low limit status register contains the status bits that are set when a temperature channel drops below the low limit. if any of these bi ts are set, then the lo w status bit in the stat us register is set. reading from the low limit status register will clear all bits. reading from the register will also clear the low status bit in the status register. 12h 1.0000 22h 1.0213 32h 1.0421 13h 1.0013 23h 1.0226 33h 1.0434 14h 1.0026 24h 1.0239 34h 1.0447 15h 1.0039 25h 1.0252 35h 1.0460 16h 1.0053 26h 1.0265 36h 1.0473 17h 1.0066 27h 1.0278 37h 1.0486 table 6.20 high limit status register addr. r/w register b7 b6 b5 b4 b3 b2 b1 b0 default 35h r-c high limit status - - - - e3high e2high e1high ihigh 00h table 6.21 low limit status register addr. r/w register b7 b6 b5 b4 b3 b2 b1 b0 default 36h r-c low limit status - - - - e3low e2low e1low ilow 00h table 6.19 substrate diode ideality factor look-up table (bjt model) (continued) setting factor setting factor setting factor
1c temperature sensor with beta compensation datasheet smsc emc1403 / emc1404 41 revision 1.37 (01-06-10) datasheet the alert pin will be set if the programmed number of consecutive alert counts have been met and any of these status bits are set. the status bits will remain set until read unless the alert pin is configured as a comparator output (see section 5.3.2 ). bit 3 - e3low - this bit is set when the external diode 3 channel drops below its programmed low limit. bit 2 - e2low - this bit is set when the external diode 2 channel drops below its programmed low limit. bit 1 - e1low - this bit is set when the external diode 1 channel drops below its programmed low limit. bit 0 - ilow - this bit is set when the internal diode channel drops below its programmed low limit. 6.17 therm limit status register the therm limit status register contains the stat us bits that are set when a temperature channel therm limit is exceeded. if any of these bits are se t, then the therm status bit in the status register is set. reading from the therm limit status re gister will not clear the status bits. once the temperature drops below the therm limit minus th e therm hysteresis, the corresponding status bits will be automatically cleared. the therm bit in the status register will be cleared when all individual channel therm bits are cleared. bit 3 - e3therm - this bit is set when the external diode 3 channel exceeds it?s programmed therm limit. when set, this bit will assert the therm pin. bit 2 - e2therm - this bit is set when the external diode 2 channel exceeds it?s programmed therm limit. when set, this bit will assert the therm pin. bit 1 - e1therm - this bit is set when the external diode 1 channel exceeds it?s programmed therm limit. when set, this bit will assert the therm pin. bit 0- itherm - this bit is set when the intern al diode channel exceeds it?s programmed therm limit. when set, this bit will assert the therm pin. 6.18 filter control register the filter configuration register controls the digital filter on the external diode 1 channel. bits 1-0 - filter[1:0] - control the level of digital filtering that is applied to the external diode temperature measurements as shown in table 6.24 . see figure 5.3 and figure 5.4 for examples on the filter behavior. table 6.22 therm limit status register addr. r/w register b7 b6 b5 b4 b3 b2 b1 b0 default 37h r-c therm limit status -- - - e3 therm e2 therm e1 therm itherm 00h table 6.23 filter configuration register addr. r/w register b7 b6 b5 b4 b3 b2 b1 b0 default 40h r/w filter control - - - - - - filter[1:0] 00h
1c temperature sensor with beta compensation datasheet revision 1.37 (01-06-10) 42 smsc emc1403 / emc1404 datasheet 6.19 product id register the product id register holds a unique value that identifies the device. 6.20 smsc id register (feh) the manufacturer id register contains an 8 bit word that identifies the smsc as the manufacturer of the emc1403 and emc1404. 6.21 revision register (ffh) the revision register contains an 8 bit word that identifies the die revision. table 6.24 filter settings filter[1:0] averaging 10 0 0 disabled (default) 0 1 level 1 10level 1 11level 2 table 6.25 product id register addrr/wregisterb7b6b5b4b3b2b1b0default fdh r product id 00100001 21h emc1403 fdh r product id 00100101 25h emc1404 table 6.26 manufacturer id register addr.r/wregisterb7b6b5b4b3b2b1b0default fehrsmsc id01011101 5dh table 6.27 revision register addr. r/w register b7 b6 b5 b4 b3 b2 b1 b0 default ffh r revision00000001 01h
1c temperature sensor with beta compensation datasheet smsc emc1403 / emc1404 43 revision 1.37 (01-06-10) datasheet chapter 7 typical operating curves tem perature error vs. filter capacitor (2n3904, ta = 27c, t diode = 27c, vdd = 3.3v) -1.0 -0.8 -0.5 -0.3 0.0 0.3 0.5 0.8 1.0 0 1000 2000 3000 4000 filter capacitor (pf) temperature error (c) temperature error vs. ambient temperature (2n3904, t diode = 42.5c, vdd = 3.3v) -1.0 -0.8 -0.6 -0.4 -0.2 0.0 0.2 0.4 0.6 0.8 1.0 -40 -25 -10 5 20 35 50 65 80 95 110 125 ambient temperature (c) temperature error (c) temperature error vs. external diode temperature (2n3904, ta = 42.5c, vdd = 3.3v) -1.0 -0.8 -0.6 -0.4 -0.2 0.0 0.2 0.4 0.6 0.8 1.0 -40 -25 -10 5 20 35 50 65 80 95 110 125 external diode temperature (c) temperature error (c) temperature error vs. cpu temperature typical 65nm cpu from major vendor (ta = 27c, vdd = 3.3v, beta = 011, c filter = 470pf) -1 0 1 2 3 4 5 20 40 60 80 100 120 cpu temperature (c) temperature error (c) beta compensation disabled beta compensation enabled
1c temperature sensor with beta compensation datasheet revision 1.37 (01-06-10) 44 smsc emc1403 / emc1404 datasheet temperature error vs. series resistance 0.0 0.2 0.4 0.6 0.8 1.0 0 50 100 150 200 0 20 40 60 80 100 120 rec enabled rec disabled series r (ohm) temperature error ( c) rec enabled temperature error ( c) rec disabled temperature error vs. ambient temperature (2n3904, t diode = 27c, vdd = 3.3v) -2.0 -1.5 -1.0 -0.5 0.0 0.5 1.0 1.5 2.0 -40 -25 -10 5 20 35 50 65 80 95 110 125 ambient temperature (c) temperature error (c) ext2 - a pd ext3 - a pd supply current vs. conversion rate 200 300 400 500 600 700 800 900 1000 1100 1200 1248 163264 conversion rate supply current (u a dy namic averaging enabled dy namic averaging disabled
smsc emc1403 / emc1404 45 revision 1.37 (01-06-10) datasheet 1c temperature sensor with beta compensation datasheet chapter 8 package information figure 8.1 10-pin msop / tssop package a a2 a1 seating plane side view ccc c gauge plane h 3-d view top view c 3 2 end view 4 3 5 detail "a" notes: 1. all dimensions are in millimeter. 2. tolerance on the true position of each lead is 0.04 mm at maximum material condition. 3. package body dimensions "d" and "e1" do not include mold/interlead protrusions or flash. maximum mold protrusions or flash is 0.15 mm (0.006 inches) per end and side. dimensions "d" and "e1" are determined at the outermost extremes of the plastic body, including any mismatch between top and bottom plastic body. they are determined at datum plane "h". 4. dimensions "b" and "c" apply to the flat section of the lead between 0.08 mm and 0.15 mm from the lead tip. 5. details of the pin 1 identifier are optional, but must be located within the zone indicated. a initial release 3/29/05 s.k.iliev c see detail "a" e d e1 e pin 1 identifier area (d/2 x e1/2) 10x b l (0.95) 0.25 0 - 8 dim and tol per asme y14.5m - 1994 finish material decimal x.x x.xx x.xxx 80 arkay drive hauppauge, ny 11788 usa angular print with "scale to fit" do not scale drawing checked approved name drawn dwg number scale title date std compliance unless otherwise specified dimensions are in millimeters and tolerances are: third angle projection rev sheet revision description revision history released by date package outline 10 pin tssop, 3x3 mm body, 0.50 mm pitch 1 - - 0.1 0.05 0.025 s.k.iliev s.k.iliev s.k.iliev 3/29/05 3/29/05 1:1 3/29/05 mo-10-tssop-3x3 jedec: mo-187 1 of 1 a c seating plane 4
1c temperature sensor with beta compensation datasheet revision 1.37 (01-06-10) 46 smsc emc1403 / emc1404 datasheet figure 8.2 10-pin dfn package drawing
1c temperature sensor with beta compensation datasheet smsc emc1403 / emc1404 47 revision 1.37 (01-06-10) datasheet figure 8.3 10-pin dfn package dimensions figure 8.4 10 pin dfn pcb footprint
1c temperature sensor with beta compensation datasheet revision 1.37 (01-06-10) 48 smsc emc1403 / emc1404 datasheet figure 8.5 package drawing and pcb footprint for soic-14
symbol min nom max note remark a 1.35 - 1.75 - overall pkg height a1 0.10 - 0.25 - standoff a2 1.25 1.65 - body thickness d 8.53 8.64 8.74 3 "x" body size e 5.79 5.99 6.20 - lead span e1 3.81 3.91 4.01 3 "y" body size l 0.41 0.64 0.89 - lead foot length b 0.31 - 0.51 2,4 lead width c 0.18 0.25 4 lead foot thickness e- l e a d p i t c h notes: 3. dimension "d" does not include mode flash, protrusions, or gate burrs. maximum mold flash, protrusions, or gate burrs is 0.152mm per end. dimension "e1" does not include interlead flash or protrusion. maximum interlead flash or protrusion is 0.254mm pe 4. "b" & "c" apply toteh flat section of the lead between 0.102mm and 0.254mm from the lead tip. 5. the chamfer feature is optional. if it is not present, then a pin1 identifier must be located within the index area indicated. common dimensions 1.27 bsc 1. all dimension are in mm. 2. true position spread tolerance of each lead is 0.125mm at maximum material condition. dimension "b" does not include dambar protusion. dambar cannot be located on the lower radius of the foot 1c temperature sensor with beta compensation datasheet smsc emc1403 / emc1404 49 revision 1.37 (01-06-10) datasheet 8.1 package markings 8.1.1 emc1404-x-aizl (10-pin msop) all devices will be marked on the first line of the t op side with ?1404?. on the second line, they will be marked with the appropriate -x number (-1, -2, et c), the functional revision ?b? and country code (cc). 8.1.2 emc1403-x-aizl (10-pin msop) all devices will be marked on the first line of the to p side with ?1403?. on the second line, packages will be marked with the appropriate -x number (-1, -2, etc), the functional revision ?b? and country code (cc). figure 8.6 package dimensions for soic-14
1c temperature sensor with beta compensation datasheet revision 1.37 (01-06-10) 50 smsc emc1403 / emc1404 datasheet 8.1.3 emc1403-1-aia and em c1403-2-aia (10-pin dfn) the emc1403-1-aia will be marked on the first line of the top side with the code ?31? followed by the first two characters of the last 6 characters of the lot number. the emc1 403-2-aia is marked with the code ?32? followed by the first two characters of the last 6 characters of the lot number. on the second line, packages will be marked with th e last 4 characters of the lot number. for example: if the lot number is ?2h123456a?, the first line on the emc1403-1-aia will read ?3123? and the second line will read ?456a?. 8.1.4 emc1403-yzt all devices will be marked on the first line of the t op side with ?emc1403? followed by ?-x? where x is the appropriate -x number (-1, -2, etc). on the se cond line, packages will be marked with functional revision ?b?, date code and the last 7 characters of lot number.
1c temperature sensor with beta compensation datasheet smsc emc1403 / emc1404 51 revision 1.37 (01-06-10) datasheet chapter 9 revision history table 9.1 customer revision history revision level & date secti on/figure/entr y correction rev. 1.37 (01-06-10) section 8.1.4, "emc1403- yzt" added to last sentence: ?revision ?b?, date code and the last 7 characters of? before ?lot number?. section 8.1.3, "emc1403-1- aia and emc1403-2-aia (10-pin dfn)" corrected device code. in stead of being ?32? for both devices in the 10-pin dfn package, the code is ?31? for the emc1403-1-aia and ?32? for the emc1403-2-aia. rev. 1.36 (07-02-09) table 2.1, "emc1403 and emc1404 pin description" in pin description table, added to function column: ?requires pull-up resistor? for smdata and smclk pins table 2.1, "emc1403 and emc1404 pin description" identified 5v tolerant pins. added the following application note below table: ?for the 5v tolerant pins that have a pull-up resistor (smclk, smdata, therm , and alert ), the voltage difference between vdd and the pull-up voltage must never exceed 3.6v.? table 3.1, "absolute maximum ratings" updated voltage limits for 5v tolerant pins with pull-up resistors. added the following note below table: ?for the 5v tolerant pins that have a pull-up resistor (smclk, smdata, therm , and alert ), the pull-up voltage must not exceed 3. 6v when the device is unpowered.? table 3.2, "electrical specifications" added leakage current. rev. 1.35 (04-14-09) figure 8.2, "10-pin dfn package drawing" figure 8.3, "10-pin dfn package dimensions" figure 8.4, "10 pin dfn pcb footprint" diagrams updated table 3.1, "absolute maximum ratings" updated thermal resistance numbers rev. 1.34 (02-27-09) table 5.3, "temperature data format" extended range for -1 updated from 001 1111 1111 to 001 1111 1000 rev. 1.33 (08-18-08) ordering information and table 1.1, "part selection" added emc1403-3 and emc1403-4 for all package options rev. 1.32 (07-10-08) ordering information and table 1.1, "part selection" added emc1404-4 rev. 1.31 (07-01-08) ordering information and table 1.1, "part selection" added emc1404-2 and emc1404-3

▲Up To Search▲

Price & Availability of EMC1403-2-YZT-TR

	To Download EMC1403-2-YZT-TR Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .