EMC1402
1°C Temperature
Sensor with Beta
Compensation
PRODUCT FEATURES
GENERAL DESCRIPTION
The EMC1402 is a high accuracy, low cost, System
Management Bus (SMBus) temperature sensor.
Advanced features such as Resistance Error Correction
(REC), Beta Compensation (to support 90nm and 65nm
CPU diodes) 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 ±2°C accuracy for the internal diode
temperature. The EMC1402 monitors two temperature
channels (one 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 temperature errors caused by
low, variable beta transistors common in today's fine
geometry processors. The automatic beta detection
feature monitors the external diode/transistor and
determines the optimum sensor settings for accurate
temperature measurements regardless of processor
technology. This frees the user from providing unique
sensor configurations for each temperature monitoring
application. These advanced features plus ±1°C
measurement accuracy provide a low-cost, highly
flexible and accurate solution for critical temperature
monitoring applications.
APPLICATIONS
Notebook Computers
Desktop Computers
Industrial
Embedded applications
Datasheet
FEATURES
Support for 90nm and 65nm CPU diodes
Pin compatible with ADM1032, MAX6649, and LM99
Automatically determines external diode type and
optimal settings
Resistance Error Correction
External Temperature Monitors
— ±1°C Accuracy (60°C < T
DIODE
< 100°C)
— 0.125°C Resolution
Internal Temperature Monitor
— ±2°C accuracy
3.3V Supply Voltage
Programmable temperature limits for ALERT and
THERM
Small 8-pin MSOP Lead-free RoHS Compliant
Package
EMC1402 PIN DESCRIPTION
VDD
DP
DN
THERM
1
2
3
4
8
7
6
5
SMCLK
SMDATA
ALERT
GND
SMSC EMC1402
DATASHEET
Revision 1.16 (03-15-07)
SMSC [ SMSC CORPORATION ]
