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EMC1182-1-AC3-TR 参数 Datasheet PDF下载

EMC1182-1-AC3-TR图片预览
型号: EMC1182-1-AC3-TR
PDF下载: 下载PDF文件 查看货源
内容描述: 双通道1C温度传感器,带有beta补偿和1.8V的SMBus通信 [Dual Channel 1C Temperature Sensor with Beta Compensation and 1.8V SMBus Communications]
分类和应用: 传感器温度传感器通信
文件页数/大小: 48 页 / 565 K
品牌: SMSC [ SMSC CORPORATION ]
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Dual Channel 1°C Temperature Sensor with Beta Compensation and 1.8V SMBus Communications  
Datasheet  
Chapter 5 Product Description  
The is an SMBus temperature sensor. The EMC1182 monitors one internal diode and one externally  
connected temperature diode.  
Thermal management is performed in cooperation with a host device. This consists of the host reading  
the temperature data of both the external and internal temperature diodes of the EMC1182 and using  
that data to control the speed of one or more fans.  
The EMC1182 has two levels of monitoring. The first provides a maskable ALERT / THERM2 signal  
to the host when the measured temperatures exceeds user programmable limits. This allows the  
EMC1182 to be used as an independent thermal watchdog to warn the host of temperature hot spots  
without direct control by the host. The second level of monitoring provides a non-maskable interrupt  
on the THERM pin if the measured temperatures meet or exceed a second programmable limit.  
Figure 5.1 shows a system level block diagram of the EMC1182.  
1.8V 1.8V – 3.3V  
VDD = 3.3V  
VDD  
Host  
CPU / GPU  
DP  
DN  
Thermal  
Junction  
SMCLK  
SMDATA  
EMC1182  
SMBus  
Interface  
ALERT / THERM2  
THERM / ADDR  
Power  
Control  
GND  
Figure 5.1 System Diagram for EMC1182  
5.1  
Modes of Operation  
The EMC1182 has two modes of operation.  
Active (Run) - In this mode of operation, the ADC is converting on all temperature channels at the  
programmed conversion rate. The temperature data is updated at the end of every conversion and  
the limits are checked. In Active mode, writing to the one-shot register will do nothing.  
Standby (Stop) - In this mode of operation, the majority of circuitry is powered down to reduce  
supply current. The temperature data is not updated and the limits are not checked. In this mode  
of operation, the SMBus is fully active and the part will return requested data. Writing to the one-  
shot register will enable the device to update all temperature channels. Once all the channels are  
updated, the device will return to the Standby mode.  
Revision 1.0 (07-11-13)  
18  
SMSC EMC1182  
DATASHEET