EMC1046_09 Datasheet, PDF (1/37 Pages) SMSC Corporation – 1°C Multiple Temperature Sensor

EMC1046/EMC1047
1°C Multiple Temperature
Sensor with Beta
Compensation and
Hottest of Thermal Zones
PRODUCT FEATURES
Datasheet
General Description
The EMC1046/EMC1047are 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 monitor up to
seven temperature channels (up to six external and one
internal).
Applications
„ Notebook Computers
„ Desktop Computers
„ Industrial
„ Embedded Applications
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
„ 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
Anti-
parallel
diode
Analog
Mux
Internal
Temp
Diode
11 bit Σ Δ
ADC
Temp Registers
Hottest of Comparison
SMBus
Slave
Protocol
SMCLK
SMDATA
* denotes EMC1047 only
SMSC EMC1046/EMC1047
DATASHEET
Revision 0.69 (06-29-09)