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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  
APPLICATION NOTE: When monitoring a substrate transistor or CPU diode and beta compensation is enabled, the  
Ideality Factor should not be adjusted. Beta Compensation automatically corrects for most  
ideality errors.  
5.7  
Diode Faults  
The EMC1182 detects an open on the DP and DN pins, and a short across the DP and DN pins. For  
each temperature measurement made, the device checks for a diode fault on the external diode  
channel(s). When a diode fault is detected, the ALERT / THERM2 pin asserts (unless masked, see  
Section 5.8) and the temperature data reads 00h in the MSB and LSB registers (note: the low limit will  
not be checked). A diode fault is defined as one of the following: an open between DP and DN, a short  
from VDD to DP, or a short from VDD to DN.  
If a short occurs across DP and DN or a short occurs from DP to GND, the low limit status bit is set  
and the ALERT / THERM2 pin asserts (unless masked). This condition is indistinguishable from a  
temperature measurement of 0.000°C (-64°C in extended range) resulting in temperature data of 00h  
in the MSB and LSB registers.  
If a short from DN to GND occurs (with a diode connected), temperature measurements will continue  
as normal with no alerts.  
5.8  
5.9  
Consecutive Alerts  
The EMC1182 contains multiple consecutive alert counters. One set of counters applies to the ALERT  
/ THERM2 pin and the second set of counters applies to the THERM pin. Each temperature  
measurement channel has a separate consecutive alert counter for each of the ALERT / THERM2 and  
THERM pins. All counters are user programmable and determine the number of consecutive  
measurements that a temperature channel(s) must be out-of-limit or reporting a diode fault before the  
corresponding pin is asserted.  
See Section 6.11, "Consecutive ALERT Register 22h" for more details on the consecutive alert  
function.  
Digital Filter  
To reduce the effect of noise and temperature spikes on the reported temperature, the External Diode  
channel uses a programmable digital filter. This filter can be configured as Level 1, Level 2, or Disabled  
(default) (see Section 6.14). The typical filter performance is shown in Figure 5.4 and Figure 5.5.  
Revision 1.0 (07-11-13)  
22  
SMSC EMC1182  
DATASHEET