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EMC1182-1-AIA-TR 参数 Datasheet PDF下载

EMC1182-1-AIA-TR图片预览
型号: EMC1182-1-AIA-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  
5.2  
5.3  
Conversion Rates  
The EMC1182 may be configured for different conversion rates based on the system requirements.  
The conversion rate is configured as described in Section 6.5. The default conversion rate is 4  
conversions per second. Other available conversion rates are shown in Table 6.6, "Conversion Rate".  
Dynamic Averaging  
Dynamic averaging causes the EMC1182 to measure the external diode channels for an extended time  
based on the selected conversion rate. This functionality can be disabled for increased power savings  
at the lower conversion rates (see Section 6.4, "Configuration Register 03h / 09h"). When dynamic  
averaging is enabled, the device will automatically adjust the sampling and measurement time for the  
external diode channels. This allows the device to average 2x or 16x longer than the normal 11 bit  
operation (nominally 21ms per channel) while still maintaining the selected conversion rate. The  
benefits of dynamic averaging are improved noise rejection due to the longer integration time as well  
as less random variation of the temperature measurement.  
When enabled, the dynamic averaging applies when a one-shot command is issued. The device will  
perform the desired averaging during the one-shot operation according to the selected conversion rate.  
When enabled, the dynamic averaging will affect the average supply current based on the chosen  
conversion rate as shown in Table 5.1.  
Table 5.1 Supply Current vs. Conversion Rate for EMC1182  
AVERAGE SUPPLY CURRENT  
(TYPICAL)  
AVERAGING FACTOR (BASED ON  
11-BIT OPERATION)  
ENABLED  
(DEFAULT)  
ENABLED  
(DEFAULT)  
CONVERSION RATE  
DISABLED  
DISABLED  
1 / 16 sec  
1 / 8 sec  
1 / 4 sec  
1 / 2 sec  
1 / sec  
210uA  
265uA  
330uA  
395uA  
460uA  
890uA  
1010uA  
1120uA  
1200uA  
1400uA  
200uA  
200uA  
200uA  
200uA  
215uA  
325uA  
630uA  
775uA  
1050uA  
1100uA  
16x  
16x  
16x  
16x  
16x  
8x  
1x  
1x  
1x  
1x  
1x  
4 / sec (default)  
8 / sec  
1x  
4x  
1x  
16 / sec  
2x  
1x  
32 / sec  
1x  
1x  
64 / sec  
0.5x  
0.5x  
5.4  
THERM Output  
The THERM output is asserted independently of the ALERT output and cannot be masked. Whenever  
any of the measured temperatures exceed the user programmed Therm Limit values for the  
programmed number of consecutive measurements, the THERM output is asserted. Once it has been  
asserted, it will remain asserted until all measured temperatures drop below the Therm Limit minus  
the Therm Hysteresis (also programmable).  
SMSC EMC1182  
19  
Revision 1.0 (07-11-13)  
DATASHEET