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EMC1182

更新时间： 2024-11-30 12:29:47
品牌 Logo 应用领域
SMSC 传感器温度传感器通信
页数 文件大小 规格书
48页 565K
描述
Dual Channel 1C Temperature Sensor with Beta Compensation and 1.8V SMBus Communications

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EMC1182  
Dual Channel 1°C Temperature Sensor with Beta  
Compensation and 1.8V SMBus Communications  
Datasheet  
PRODUCT FEATURES  
General Description  
Applications  
Notebook Computers  
Desktop Computers  
Industrial  
The EMC1182 is a high accuracy, low cost, 1.8V System  
Management Bus (SMBus) compatible temperature sensor.  
Advanced features such as Resistance Error Correction (REC),  
Beta Compensation (to support CPU diodes requiring the  
BJT/transistor model including 65nm and lower geometry  
processors) and automatic diode type detection combine to  
provide a robust solution for complex environmental monitoring  
applications. The ability to communicate at 1.8V SMBus levels  
provides compatible I/O for the advanced processors found in  
today’s tablet and smartphone applications.  
Embedded applications  
Features  
Support for diodes requiring the BJT/transistor model  
Supports 65nm and lower geometry CPU thermal  
diodes  
—
Pin and register compatible with EMC1412  
Automatically determines external diode type and  
optimal settings  
The EMC1182 monitors two temperature channels (one  
external and one internal), providing ±1°C accuracy for both  
external and internal diode temperatures.  
Resistance Error Correction  
Frequency hops the remote sample frequency to reject  
DC converter and other coherent noise sources*  
Consecutive Alert queue to further reduce false Alerts  
Up to 1 External Temperature Monitor  
REC automatically eliminates the temperature error caused by  
series resistance allowing greater flexibility in routing thermal  
diodes. Frequency hopping* and analog filters ensure remote  
diode traces can be as far as eight (8) inches without degrading  
the signal. Beta Compensation eliminates temperature errors  
caused by low, variable beta transistors common in today's fine  
geometry processors. The automatic beta detection feature  
monitors the external diode/transistor and determines the  
optimum sensor settings for accurate temperature  
measurements regardless of processor technology. This frees  
the user from providing unique sensor configurations for each  
temperature monitoring application. These advanced features  
plus ±1°C measurement accuracy provide a low-cost, highly  
flexible and accurate solution for critical temperature monitoring  
applications.  
—
—
—
25°C typ, ±1°C max accuracy (20°C < TDIODE < 110°C)  
0.125°C resolution  
Supports up to 2.2nF diode filter capacitor  
Internal Temperature Monitor  
—
—
±1°C accuracy  
0.125°C resolution  
3.3V Supply Voltage  
1.8V SMBus operation  
Programmable temperature limits for ALERT/THERM2  
(85°C default high limit and 0°C default low limit) and  
THERM (85°C default)  
Available in small 8-pin 2mm x 3mm TDFN RoHS  
compliant package  
Available in small 8-pin 3mm x 3mm DFN RoHS  
compliant package  
VDD = 3.3V  
1.8V – 3.3V  
1.8V  
VDD  
VDD  
EMC1182  
CPU / GPU  
Host  
Conversion Rate Register  
Switching  
Current  
DP  
DN  
Low Limit Registers  
DP  
Thermal  
Junction  
SMCLK  
SMDATA  
SMCLK  
Analog  
Mux  
High Limit Registers  
1
D
External  
Temperature  
Register(s)  
N1  
THERM Limit Register  
EMC1182  
ΔΣADC  
SMDATA  
SMBus  
Interface  
THERM Hysteresis  
Register  
Internal  
Temperature  
Register  
ALERT / THERM2  
Internal  
Temp Diode  
Interupt Masking  
Configuration Register  
ALERT / THERM2  
THERM / ADDR  
THERM / ADDR  
SMBus Address Decode  
Status Registers  
GND  
Power Control  
GND  
* Technology covered under the US patent 7,193,543.  
SMSC EMC1182  
Revision 1.0 (07-11-13)  
DATASHEET  
1234567...48

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