The EMC1043 is a family of System Management Bus (SMBus) temperature sensors that monitors three temperature zones, one internal diode and two externally connected diodes, for PC and embedded environments. The EMC1043 includes beta compensation circuitry to correct for variation in the beta of measurement transistors. Other extended features include resistance error correction and ideality factor configuration to eliminate major sources of temperature measurement error1.

An added feature to the EMC1043 is a function that automatically compares the two external temperature zones and reports the hotter of the two temperatures. Selectable conversion rates and standby mode support low-power operation. The temperature measurement ranges support data ranges (and formats), -64°C to +127°C and -64°C to +191°C.

1. Patents pending.

Features

  Supports two External Temperature Diodes

  ±1.0°C Accuracy (40°C to 80°C)

  0.125°C Resolution

  Ideality Factor Configuration

  Accepts 2200pF Cap Across External Diodes for Noise Suppression

  Optional Resistive Error Correction on External Diode 2

  Resistance Error Correction (up to 100 Ohms)

  Beta Compensation

  Internal Temperature Diode

  ±3°C Accuracy (0°C to 85°C)

  0.125°C Resolution

  Low Power Operation

  4uA Standby Current

  3.0V to 3.6V Supply

  Programmable Conversion Rate

  SMBus 2.0 Compliant

  Four SMBus Address Available

  Reports Hotter of Two Diodes with Dual-core CPU

Applications

  Desktop and Notebook Computers

  Hardware Management

  Servers

  Embedded Applications