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LM99CIMMX/NOPB PDF预览

LM99CIMMX/NOPB

更新时间： 2024-11-14 11:11:03
品牌 Logo 应用领域
德州仪器 - TI 温度传感传感器温度传感器
页数 文件大小 规格书
30页 702K
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采用 TruTherm 技术且具有 SMBus 接口的远程和本地温度传感器 | DGK | 8 | 0 to 85

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LM99CIMMX/NOPB 数据手册

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LM99  
www.ti.com  
SNIS129D –JANUARY 2003–REVISED MARCH 2013  
LM99 ±1°C Accurate, High Temperature, Remote Diode Temperature Sensor with Two-  
Wire Interface  
Check for Samples: LM99  
1
FEATURES  
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:  
2
•
Accurately Senses the Temperature of Remote  
Diodes  
•
Offset Register Allows Use of a Variety of  
Thermal Diodes  
•
•
On-board Local Temperature Sensing  
10 Bit Plus Sign Remote Diode Temperature  
Data Format, 0.125 °C Resolution  
•
•
•
T_CRIT_A Output Useful for System Shutdown  
ALERT Output Supports SMBus 2.0 Protocol  
SMBus 2.0 Compatible Interface, Supports  
TIMEOUT  
TACTUAL DIODE JUNCTION = TLM99 + 16°C  
The local temperature reading requires no offset.  
•
8-Pin VSSOP Package  
The LM99 has an Offset Register which provides a  
means for precise matching to various thermal  
diodes.  
APPLICATIONS  
•
•
•
•
Graphics Processor Thermal Management  
Computer Processor Thermal Management  
Electronic Test Equipment  
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.  
Office Electronics  
Activation of the ALERT output occurs when any  
temperature 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.  
KEY SPECIFICATIONS  
•
•
•
Supply Voltage 3.0 V to 3.6 V  
Supply Current 0.8 mA (typ)  
Local Temp Accuracy  
(Includes Quantization error)  
–
TA = 25°C to 125°C ±3.0°C (Max)  
•
Remote Diode Temp Accuracy  
(Includes Quantization Error)  
–
TA = 30°C to 50°C, TD = 120°C to 140°C  
±1.0°C (Max)  
–
TA = 0°C to 85°C, TD = 25°C to 140°C ±3.0°C  
(Max)  
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of  
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
2
All trademarks are the property of their respective owners.  
PRODUCTION DATA information is current as of publication date.  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
Copyright © 2003–2013, Texas Instruments Incorporated  
1234567...30

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LM99CIMMX/NOPB 替代型号

型号 品牌 替代类型 描述 数据表
LM99-1CIMM/NOPB TI

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 采用 TruTherm 技术且具有 SMBus 接口的远程和本地温度传感器 | DGK |

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