EMC1053
1°C Triple Temperature
Sensor with Resistance
Error Correction &
Hotter of Two Zones
PRODUCT FEATURES
GENERAL DESCRIPTION
The EMC1053 is a System Management Bus (SMBus)
temperature sensor that monitors three temperature
zones, one internal diode and two externally connected
diodes, for PC and embedded environments. The
EMC1053 includes resistance error correction and
ideality factor configuration to eliminate major sources of
temperature measurement error.
1
An added feature to the EMC1053 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)
— Selectable Beta Compensation for Substrate Diodes
—
±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
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 EMC1053
DATASHEET
Revision 1.37 (02-05-07)