EMCT03
1°C Triple SMBus
Temperature Sensor
Datasheet
General Description
The EMCT03 is a System Management Bus (SMBus)
temperature sensor that is capable of monitoring three
temperature zones. The three temperature zones
consist of two external and one internal temperature
diode. The internal 11 bit sigma-delta ADC architecture
with digital filtering attributes to superb linearity and
immunity to interference and noise. An extended
temperature format may be selected for compatibility
with a broad range of CPUs. Selectable conversion
rates and standby mode support low-power operation.
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Features
Low Power; 3.0V to 3.6V Supply
— Programmable conversion rate
— < 1mA at 16 Conversions per Second
— < 3uA in Standby Mode
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■
SMBus 2.0 Compliant interface
Two External Temperature Monitors:
—
—
—
—
Range -64°C to +191°C
0.125°C resolution
±1°C
Accuracy 40°C to 80°C
Diode Fault Reporting
■
Internal Temperature Monitor
— Range 0°C to +85°C
— 0.125°C resolution
—
±3°C
Accuracy 0°C to 85°C
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■
Programmable Conversion Rate
MSOP-8 3x3mm Package; Green, Lead-Free
Package also available.
Simplified Block Diagram
EMCT03
Switching
Current
Remote Temp
Register 1
SMBus Interface
Analog Mux
Configuration
Register
DP1
DN1
DP2
DN2
Local Temp
Diode
11-bit
Sigma Delta
ADC
Remote Temp
Register 2
Digital Mux
and
Byte Interlock
Local Temp
Register
Status Register
SMCLK
SMDATA
SMSC EMCT03
DATASHEET
Revision 2.3 (04-19-05)
SMSC [ SMSC CORPORATION ]
