EMC1428
1°C Multiple Temperature Sensor with HW Thermal Shutdown & Hottest of Thermal Zones Supporting Eight Temperatures
General Description
The EMC1428 is a high accuracy, low cost, System Management Bus (SMBus) temperature sensor. Advanced features such as Resistance Error Correction (REC), Beta Compensation (to CPU diodes requiring the BJT or transistor model) and automatic diode type detection combine to provide a robust solution for complex environmental monitoring applications.
Additionally, the EMC1428 provides a hardware programmable system shutdown feature that is programmed at part power-up via a single TRIP_SET voltage channel that cannot be masked or corrupted through the SMBus.
Each device provides ±1° accuracy for external diode temperatures and ±2°C accuracy for the internal diode temperature. The EMC1428 monitors up to eight temperature channels (up to seven external and one internal).
Features
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Hardware Thermal Shutdown
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triggers dedicated SYS_SHDN# pin |
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hardware configured range 65°C to 127°C in 1°C steps |
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cannot be disabled or modified by software
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Designed to support 45nm, 65nm, and 90nm CPU diodes |
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Supports diodes requiring the BJT or transistor model |
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Resistance Error Correction (up to 100 Ohms) |
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Up to seven External Temperature Monitors
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±1°C Accuracy (60°C < TDIODE < 100°C) |
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0.125°C Resolution |
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Supports up to 2.2nF filter capacitor |
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Anti-parallel diodes for extra diode support and compact design |
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Internal Temperature Monitor
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±2°C accuracy |
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3.3V Supply Voltage |
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Available in a 16 pin 4mm x 4mm QFN lead-free RoHs Compliant package |
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Programmable temperature limits for ALERT# |
Applications
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Notebook Computers |
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Desktop Computers |
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Industrial |
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Embedded applications |
EMC1428 Block Diagram
ORDERING INFORMATION
| Ordering Number | Package | Features | Diode Modes Supported | SMBus Address |
| EMC1428-1-AP | 16 pin QFN (Lead-Free ROHS Compliant) | Up to 7 external diodes. "Hottest Of" temperature comparison. Hardware set Critical/Thermal shutdown, ALERT output | Intel CPU and 3904 | 1001_100(r/w) |
| EMC1428-6-AP | 16 pin QFN (Lead-Free RoHS Compliant) | Up to 7 external diodes. "Hottest Of"
temperature comparison. Hardware set Critical/Thermal shutdown, ALERT output | Intel CPU and 3904 | 1001_101(r/w) |
 EMC1428 Data Sheet, Application Notes,
Drivers and Design Tools
| Description |
File Name |
File Size |
Date |
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| EMC1428 Data Brief |
1428db.pdf |
142K |
3/5/08 |
| EMC1428 Data Sheet |
1428.pdf |
713K |
3/5/08 |
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| Evaluation Board |
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EVB-EMC1428
Schematic, PDF
Bill of Materials, PDF
Users Guide, PDF
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evb1428sch.pdf
evb1428bom.pdf
evb1428user.pdf
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173K
78K
615K |
7/3/07
7/18/07
8/21/07 |
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| Application Notes |
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| Application Note 10-14: Using Temperature Sensing Diodes with EMC Devices - Remote Sensors |
an1014.pdf |
162K |
7/18/06 |
| Application Note 12-14: Remote Thermal Sensing Diode Selection Guide |
an1214.pdf |
216K |
9/9/05 |
| Application Note 13-19: Resistance Error Correction |
an1319.pdf |
210K |
11/11/05 |
| Application Note 14-0: SMBus Temperature Sensors from SMSC in an I2C System |
an140.pdf |
119K |
12/12/05 |
| Application Note 16-4: Using Anti-Parallel Diode (APD) with SMSC Temperature Sensors |
an164.pdf |
185K |
4/26/07 |
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| White Paper |
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| White Paper 1-7: Portable Design Beyond ON/OFF Fan Control |
wp17.pdf |
175K |
8/11/05 |
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| Other Information |
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| Using the Adobe® Acrobat® Reader |
aacrobat.html |
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