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LM99-1CIMMX PDF预览

LM99-1CIMMX

更新时间: 2024-11-12 22:47:03
品牌 Logo 应用领域
美国国家半导体 - NSC 二极管传感器温度传感器
页数 文件大小 规格书
20页 345K
描述
【1C Accurate, High Temperature, Remote Diode Temperature Sensor with Two-Wire Interface

LM99-1CIMMX 技术参数

是否Rohs认证: 不符合生命周期:Transferred
包装说明:MO-187, MSOP-8Reach Compliance Code:not_compliant
ECCN代码:EAR99HTS代码:8542.39.00.01
风险等级:5.62最大精度(摄氏度):3 Cel
主体宽度:3 mm主体高度:0.86 mm
主体长度或直径:3 mm外壳:PLASTIC
JESD-609代码:e0安装特点:SURFACE MOUNT
位数:11最大工作电流:0.8 mA
最高工作温度:125 °C最低工作温度:
输出接口类型:2-WIRE INTERFACE封装形状/形式:SQUARE
传感器/换能器类型:TEMPERATURE SENSOR,SWITCH/DIGITAL OUTPUT,SERIAL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:Tin/Lead (Sn85Pb15)端接类型:SOLDER
Base Number Matches:1

LM99-1CIMMX 数据手册

 浏览型号LM99-1CIMMX的Datasheet PDF文件第2页浏览型号LM99-1CIMMX的Datasheet PDF文件第3页浏览型号LM99-1CIMMX的Datasheet PDF文件第4页浏览型号LM99-1CIMMX的Datasheet PDF文件第5页浏览型号LM99-1CIMMX的Datasheet PDF文件第6页浏览型号LM99-1CIMMX的Datasheet PDF文件第7页 
July 2003  
LM99  
1˚C Accurate, High Temperature, Remote Diode  
Temperature Sensor with Two-Wire Interface  
n On-board local temperature sensing  
n 10 bit plus sign remote diode temperature data format,  
0.125 ˚C resolution  
n T_CRIT_A output useful for system shutdown  
n ALERT output supports SMBus 2.0 protocol  
n SMBus 2.0 compatible interface, supports TIMEOUT  
n 8-pin MSOP package  
General Description  
The LM99 is an 11-bit remote diode temperature sensor with  
a 2-wire System Management Bus (SMBus) serial interface.  
The LM99 accurately measures: (1) its own temperature and  
(2) the temperature of a remote diode-connected transistor  
such as the 2N3904 or a thermal diode commonly found on  
Graphics Processor Units (GPU), Computer Processor Units  
(CPU or other ASICs. The LM99 remote diode temperature  
sensor shifts the temperature from the remote sensor down  
16˚C and operates on that shifted temperature:  
Key Specifications  
j
j
j
Supply Voltage  
3.0 V to 3.6 V  
0.8 mA (typ)  
TACTUAL DIODE JUNCTION = TLM99 + 16˚C  
Supply Current  
The local temperature reading requires no offset.  
Local Temp Accuracy (includes quantization error)  
The LM99 has an Offset Register which provides a means  
for precise matching to various thermal diodes. Contact  
TA = 25˚C to 125˚C  
3.0˚C (max)  
@
hardware.monitor nsc.com for the latest details.  
j
Remote Diode Temp Accuracy (includes quantization  
The LM99 and LM99-1 have the same functions but different  
SMBus slave addresses. This allows for one of each to be on  
the same bus at the same time.  
error)  
TA= 30˚C to 50˚C, TD= 120˚C to 140˚C  
TA= 0˚C to 85˚C, TD= 25˚C to 140˚C  
1.0˚C (max)  
3.0˚C (max)  
Activation of the ALERT output occurs when any tempera-  
ture goes outside a preprogrammed window set by the HIGH  
and LOW temperature limit registers or exceeds the T_CRIT  
temperature limit. Activation of the T_CRIT_A occurs when  
any temperature exceeds the T_CRIT programmed limit.  
Applications  
n Graphics Processor Thermal Management  
n Computer Processor Thermal Management  
n Electronic Test Equipment  
Features  
n Office Electronics  
n Accurately senses the temperature of remote diodes  
n Offset register allows use of a variety of thermal diodes  
Simplified Block Diagram  
20053801  
NVIDIA® is a registered trademark of NVIDIA Corporation.  
GeForce is a trademark of NVIDIA Corporation.  
Intel® and Pentium® are registered trademarks of Intel Corporation.  
© 2003 National Semiconductor Corporation  
DS200538  
www.national.com  

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