EMC1422 Features
	EMC1422 Applications
	EMC1422 Block Diagram
	Data Sheet, Application Notes, Drivers and Design Tools

General Description

The EMC1422 is a high accuracy, low cost, System Management Bus (SMBus) temperature sensor. 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.

Additionally, the EMC1422 provides a hardware programmable system shutdown feature that is programmed at part power-up via two pull-up resistor values and 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 EMC1422 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.

Features

	Hardware Thermal Shutdown triggers dedicated SYS_SHDN pin hardware configured range 77°C to 112°C in 1°C steps cannot be disabled or modified by software
	Support for diodes requiring the BJT/transistor model
	Designed to support 45nm processors
	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 < TDIODE < 100°C) 0.125°C resolution Supports up to 2.2nF diode filter capacitor
	Internal Temperature Monitor ±2°C accuracy
	3.3V Supply Voltage
	Programmable temperature limits for ALERT#
	Small 8-pin MSOP Lead-free RoHS Compliant package

Applications

	Notebook Computers
	Desktop Computers
	Industrial
	Embedded applications

EMC1422 Data Sheet, Application Notes,
Drivers and Design Tools

Description	File Name	File Size	Date
EMC1422 Data Brief	1422db.pdf	321K	2/5/08
EMC1422 Data Sheet	1422.pdf	592K	2/5/08
Evaluation Board
EVB-EMC14xx    Schematic, PDF    Bill of Materials, PDF    Users Guide, PDF	evb14xxsch.pdf evb14xxbom.pdf evb14xxuser.pdf	107K 38K 1314K	8/28/06 12/13/06 12/14/06
Application Notes
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 17-0: EMC142X Pullup Resistor Circuit Considerations	an170.pdf	97K	9/17/07
White Paper
White Paper 1-7: Portable Design Beyond ON/OFF Fan Control	wp17.pdf	175K	8/11/05
Other Information
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