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LM95234CISD/NOPB

更新时间： 2024-11-24 20:08:35
品牌 Logo 应用领域
美国国家半导体 - NSC 输出元件传感器换能器
页数 文件大小 规格书
38页 469K
描述
Switch/Digital Output Temperature Sensor, DIGITAL TEMP SENSOR-SERIAL, 11BIT(s), 2Cel, SQUARE, SURFACE MOUNT, LLP-14

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LM95234CISD/NOPB 技术参数

是否Rohs认证： 符合生命周期：Transferred
包装说明：SOLCC14,.16,20Reach Compliance Code：compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：7.04最大精度（摄氏度）：2 Cel
主体宽度：4 mm主体高度：0.8 mm
主体长度或直径：4 mmJESD-609代码：e3
安装特点：SURFACE MOUNT位数：11
端子数量：14最大工作电流：0.5 mA
最高工作温度：140 °C最低工作温度：-40 °C
输出接口类型：2-WIRE INTERFACE封装主体材料：PLASTIC/EPOXY
封装等效代码：SOLCC14,.16,20封装形状/形式：SQUARE
电源：3.3 V传感器/换能器类型：TEMPERATURE SENSOR,SWITCH/DIGITAL OUTPUT,SERIAL
子类别：Other Sensors最大供电电压：3.6 V
最小供电电压：3 V表面贴装：YES
端子面层：Matte Tin (Sn)端接类型：SOLDER
Base Number Matches：1

LM95234CISD/NOPB 数据手册

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June 2007  
LM95234  
Quad Remote Diode and Local Temperature Sensor with  
SMBus Interface and TruTherm™ Technology  
TruTherm BJT beta compensation technology accurately  
senses sub-micron process thermal diodes  
Programmable digital filters and analog front end filter  
■
General Description  
LM95234 is an 11-bit digital temperature sensor with a 2-wire  
■
■
■
System Management Bus (SMBus) interface that can very  
accurately monitor the temperature of four remote diodes as  
0.125°C LSb temperature resolution  
0.03125°C LSb remote temperature resolution with digital  
filter enabled  
+127.875°C/–128°C and 0°C/255°C remote ranges  
well as its own temperature that includes patent pending re-  
mote diode TruTherm™ BJT beta compensation beta com-  
pensation technology. The four remote diodes can be  
external devices such as microprocessors, graphics proces-  
sors or diode-connected 2N3904s. The LM95234's TruTherm  
BJT beta compensation technology allows sensing of 90 nm  
or 65 nm process thermal diodes accurately.  
■
■
Remote diode fault detection, model selection and offset  
correction  
Mask and status register support  
■
■
3 programmable TCRIT outputs with programmable  
shared hysteresis and Fault-Queue  
Programmable conversion rate and shutdown mode one-  
shot conversion control  
SMBus 2.0 compatible interface, supports TIMEOUT  
Three-level address pin  
The LM95234 reports temperature in two different formats for  
+127.875°C/–128°C range and 0°C/255°C range. The  
LM95234 TCRIT1, TCRIT2 and TCRIT3 outputs are triggered  
when any unmasked channel exceeds its corresponding pro-  
grammable limit and can be used to shutdown the system, to  
turn on the system fans or as a microcontroller interrupt func-  
tion. The current status of the TCRIT1, TCRIT2 and TCRIT3  
pins can be read back from the status registers. Mask regis-  
ters are available for further control of the TCRIT outputs.  
■
■
■
■
14-pin LLP package  
Key Specifications  
Two LM95234 remote temperature channels have pro-  
grammable digital filters while the other two remote channels  
utilize a fault-queue to minimize unwanted TCRIT events  
when temperature spikes are encountered.  
±2.0°C (max)  
±0.875°C (max)  
3.0V to 3.6V  
■ꢀLocal Temperature Accuracy  
■ꢀRemote Diode Temperature Accuracy  
■ꢀSupply Voltage  
■ꢀAverage Supply Current  
ꢁꢀ(1Hz conversion rate)  
For optimum flexibility and accuracy, each LM95234 channel  
includes registers for sub-micron process or 2N3904 diode  
model selection as well as offset correction. A three-level ad-  
dress pin allows connection of up to 3 LM95234s to the same  
SMBus master. The LM95234 includes power saving func-  
tions such as: programmable conversion rate, shutdown  
mode, and disabling of unused channels.  
0.57 mA (typ)  
Applications  
Processor/Computer System Thermal Management  
(e.g. Laptop, Desktop, Workstations, Server)  
■
Electronic Test Equipment  
Office Electronics  
■
■
Features  
Accurately senses die temperature of 4 remote ICs or  
■
diode junctions and local temperature  
Connection Diagram  
LLP-14  
20106301  
TOP VIEW  
TruTherm™ is a trademark of National Semiconductor Corporation.  
Intel™ is a trademark of Intel Corporation.  
Pentium™ is a trademark of Intel Corporation.  
© 2007 National Semiconductor Corporation  
201063  
www.national.com  
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