EMC1043 Datasheet, PDF (1/28 Pages) SMSC Corporation – 1°C Triple Temperature Sensor with Beta Compensation and Hotter of Two Zones

EMC1043
1°C Triple Temperature
Sensor with Beta
Compensation and
Hotter of Two Zones
PRODUCT FEATURES
Datasheet
GENERAL DESCRIPTION
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 error.¹
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 two data ranges (and formats), -64°C to
+127°C and -64°C to +191°C.
APPLICATIONS
„ Desktop and Notebook Computers
„ Hardware Management
„ Servers
„ Embedded Applications
FEATURES
„ Supports two External Temperature Diodes
— ±1°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
— Resistive 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
1.Patents pending
SIMPLIFIED BLOCK DIAGRAM
DP1
DN1
Switching
Current
DP2
DN2
Local Temp
Diode
11-bit
delta-sigma
ADC
External Diode
1 Register
External Diode
2 Register
Internal Diode
Register
Configuration
Register
Digital Mux
and
Byte Interlock
Status Register
SMCLK
SMDATA
SMSC EMC1043
DATASHEET
Revision 1.37 (09-05-06)