EMC1182 Dual Channel 1C Temperature Sensor with Beta Compensation and 1.8V SMBus Communications Datasheet PRODUCT FEATURES General Description Applications Notebook Computers The EMC1182 is a high accuracy, low cost, 1.8V System Desktop Computers Management Bus (SMBus) compatible temperature sensor. Industrial Advanced features such as Resistance Error Correction (REC), Embedded applications Beta Compensation (to support CPU diodes requiring the BJT/transistor model including 65nm and lower geometry Features processors) and automatic diode type detection combine to Support for diodes requiring the BJT/transistor model provide a robust solution for complex environmental monitoring Supports 65nm and lower geometry CPU thermal applications. The ability to communicate at 1.8V SMBus levels diodes provides compatible I/O for the advanced processors found in Pin and register compatible with EMC1412 todays tablet and smartphone applications. Automatically determines external diode type and optimal settings The EMC1182 monitors two temperature channels (one Resistance Error Correction external and one internal), providing 1C accuracy for both Frequency hops the remote sample frequency to reject external and internal diode temperatures. DC converter and other coherent noise sources* REC automatically eliminates the temperature error caused by Consecutive Alert queue to further reduce false Alerts Up to 1 External Temperature Monitor series resistance allowing greater flexibility in routing thermal 25C typ, 1C max accuracy (20C < T < 110C) diodes. Frequency hopping* and analog filters ensure remote DIODE 0.125C resolution diode traces can be as far as eight (8) inches without degrading Supports up to 2.2nF diode filter capacitor the signal. Beta Compensation eliminates temperature errors Internal Temperature Monitor caused by low, variable beta transistors common in today s fine 1C accuracy geometry processors. The automatic beta detection feature 0.125C resolution monitors the external diode/transistor and determines the 3.3V Supply Voltage optimum sensor settings for accurate temperature 1.8V SMBus operation measurements regardless of processor technology. This frees Programmable temperature limits for ALERT/THERM2 the user from providing unique sensor configurations for each (85C default high limit and 0C default low limit) and temperature monitoring application. These advanced features THERM (85C default) plus 1C measurement accuracy provide a low-cost, highly Available in small 8-pin 2mm x 3mm TDFN RoHS flexible and accurate solution for critical temperature monitoring compliant package applications. Available in small 8-pin 3mm x 3mm DFN RoHS compliant package VDD = 3.3V 1.8V 3.3V 1.8V VDD VDD EMC1182 CPU / GPU Host Conversion Rate Register Switching DP Current Low Limit Registers DP SMCLK Thermal Analog DN SMCLK D1 High Limit Registers Junction External Mux N1 SMDATA Temperature THERM Limit Register EMC1182 ADC SMDATA SMBus Register(s) Interface Internal THERM Hysteresis ALERT / THERM2 Temperature Register Internal Register Temp Diode ALERT / THERM2 Interupt Masking Configuration Register THERM / ADDR SMBus Address Decode THERM / ADDR Status Registers GND Power Control GND * Technology covered under the US patent 7,193,543. SMSC EMC1182 Revision 1.0 (07-11-13) DATASHEET Digital Mux Limit Comparator Digital Mux SMBus InterfaceDual Channel 1C Temperature Sensor with Beta Compensation and 1.8V SMBus Communications Datasheet Ordering Information: SMBUS ORDERING NUMBER PACKAGE FEATURES ADDRESS EMC1182-A-AC3-TR 8-pin TDFN 2mm x 3mm Two temperature sensors, ALERT/THERM2 Selectable via (RoHS compliant) and THERM pins, fixed SMBus address THERM pull-up EMC1182-1-AIA-TR 8-pin DFN 3mm x 3mm Two temperature sensors, ALERT/THERM2 1001 100(r/w) (RoHS compliant) and THERM pins, fixed SMBus address EMC1182-1-AC3-TR 8-pin TDFN 2mm x 3mm Two temperature sensors, ALERT/THERM2 1001 100(r/w) (RoHS compliant) and THERM pins, fixed SMBus address EMC1182-2-AIA-TR 8-pin DFN 3mm x 3mm Two temperature sensors, ALERT/THERM2 1001 101(r/w) (RoHS compliant) and THERM pins, fixed SMBus address EMC1182-2-AC3-TR 8-pin TDFN 2mm x 3mm Two temperature sensors, ALERT/THERM2 1001 101(r/w) (RoHS compliant) and THERM pins, fixed SMBus address This product meets the halogen maximum concentration values per IEC61249-2-21 For RoHS compliance and environmental information, please visit www.smsc.com/rohs Please contact your SMSC sales representative for additional documentation related to this product such as application notes, anomaly sheets, and design guidelines. Copyright 2013 SMSC or its subsidiaries. All rights reserved. Circuit diagrams and other information relating to SMSC products 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 responsibility is assumed for inaccuracies. SMSC reserves the right to make changes to specifications and product descriptions at any time without notice. Contact your local SMSC sales office to obtain the latest specifications before placing your product order. The provision of this information does not convey to the purchaser of the described semiconductor 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 terms and conditions of the most recently dated version of SMSC s standard Terms of Sale Agreement dated before the date of your order (theTerms of Sale Agreemen). The product may contain design defects or errors known as anomalies which may cause the product s functions to deviate from published specifications. Anomaly sheets are available 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 SMSCs website at