EMC1046/EMC1047
1°C Multiple Temperature
Sensor with Beta
Compensation and
Hottest of Thermal Zones
PRODUCT FEATURES
General Description
The EMC1046/EMC1047 are high accuracy, low cost,
System Management Bus (SMBus) temperature
sensors. Advanced features such as Resistance Error
Correction (REC), Beta Compensation (to CPU diodes
requiring the BJT or transistor model) and automatic
diode type detection combine to provide a robust
solution for complex environmental monitoring
applications.
Each device provides ±1° accuracy for external diode
temperatures and ±2°C accuracy for the internal diode
temperature. The EMC1046/EMC1047 monitors up to
seven temperature channels (up to six external and one
internal).
Datasheet
Features
Designed to support 45nm, 65nm, and 90nm CPU
diodes
Supports diodes requiring the BJT or transistor model
Resistance Error Correction (up to 100 Ohms)
Up to six External Temperature Monitors
—
—
—
—
±1°C Accuracy (60°C < T
DIODE
< 100°C)
0.125°C Resolution
Supports up to 2.2nF filter capacitor
Anti-parallel diodes for extra diode support and
compact design
Internal Temperature Monitor
— ±2°C accuracy
Applications
Notebook Computers
Desktop Computers
Industrial
Embedded Applications
3.3V Supply Voltage
Available in a 10 pin TSSOP lead-free RoHS
Compliant package
Block Diagram
DP1 / DN6*
DN1 / DP6*
DP2 / DN3
DN2 / DP3
DN4 / DP5
DP4 / DN5
External
Temp
Diodes
Analog
Mux
Anti-
parallel
diode
11 bit
Σ Δ
ADC
SMBus
Slave
Protocol
SMCLK
SMDATA
Temp Registers
Hottest of Comparison
Internal
Temp
Diode
* denotes EMC1047 only
SMSC EMC1046/EMC1047
DATASHEET
Revision 0.62 (03-05-08)
SMSC [ SMSC CORPORATION ]
