EMC1043
1°C Triple Temperature
Sensor with Beta
Compensation and
Hotter of Two Zones
PRODUCT FEATURES
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
1.Patents pending
Datasheet
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
—
±3°C
Accuracy (0°C to 85°C)
— 0.125°C Resolution
— 4uA Standby Current
Internal Temperature Diode
Low Power Operation
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
SIMPLIFIED BLOCK DIAGRAM
Switching
Current
External Diode
1 Register
Analog Mux
and Anti-Alias Filter
Configuration
Register
DP1
DN1
DP2
DN2
Local Temp
Diode
11-bit
delta-sigma
ADC
External Diode
2 Register
Digital Mux
and
Byte Interlock
Internal Diode
Register
Status Register
SMBus Interface
SMCLK
SMDATA
SMSC EMC1043
DATASHEET
Revision 1.37 (02-05-07)
SMSC [ SMSC CORPORATION ]
