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EMC1422

Status: In Production

Features:

  • 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
  • ±1°C Accuracy (60°C < TDIODE < 100°C)
  • 0.125°C resolution
  • Supports up to 2.2nF diode filter capacitor
  • ±2°C accuracy
  • 3.3V Supply Voltage
  • Programmable temperature limits for ALERT#
  • Small 8-pin MSOP RoHS Compliant package
  • Notebook Computers
  • Desktop Computers
  • Industrial
  • Embedded applications
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Overview
Documents
Development Environment
Similar Devices
RoHS Information
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Device Overview

Summary

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.

Additional Features

    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 RoHS Compliant package

    Applications

    • Notebook Computers
    • Desktop Computers
    • Industrial
    • Embedded applications
Parametrics
Name
Value
# Temps Monitored
2
Typical Accuracy (°)
0.25
Max. Accuracy @ 25° (°)
1
Max Input/ Supply Current (µA)
430
Temp. Range (°C)
-40 to +125
Operating Voltage Range (V)
+3.0 to +3.6
Typ Supply Current (µA)
430
Alert/THERM
1
Hardware Shutdown
1
Resistance Error Correction
Yes
Beta Compensation
Automatic
Device Description
Digital Temperature Sensor

Documents

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RoHS Information

Part Number
Device Weight (g)
Shipping Weight (Kg)
Lead Count
Package Type
Package Width
Solder Composition
JEDEC Indicator
RoHS
China EFUP
EMC1422-2-ACZL-TR
0.024600
0.220000
8
MSOP
3x3mm
NiPdAu
e4
EMC1422-1-ACZL-TR
0.024600
0.220000
8
MSOP
3x3mm
NiPdAu
e4
To see a complete listing of RoHS data for this device, please Click here
Shipping Weight = Device Weight + Packing Material weight. Please contact sales office if device weight is not available.

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