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LM95233

更新时间： 2024-11-25 02:58:19
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德州仪器 - TI /
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44页 1148K
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Dual Remote Diode and Local Temperature Sensor with SMBus Interface and TruTherm™ Technology

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LM95233  
www.ti.com  
SNIS145E –AUGUST 2006–REVISED MARCH 2013  
LM95233 Dual Remote Diode and Local Temperature Sensor with SMBus Interface and  
TruTherm™ Technology  
Check for Samples: LM95233  
1
FEATURES  
KEY SPECIFICATIONS  
23  
•
Accurately Senses Die Temperature of 2  
Remote ICs or Diode Junctions and Local  
Temperature  
•
•
Local Temperature Accuracy: ±2.0 °C (max)  
Remote Diode Temperature Accuracy: ±0.875  
°C (max)  
•
TruTherm BJT Beta Compensation Technology  
Accurately Senses Sub-Micron Process  
Thermal Diodes  
•
•
Supply Voltage: 3.0 to 3.6 V  
Average Supply Current (1Hz conversion rate):  
0.57 mA (typ)  
•
•
0.125°C LSb Temperature Resolution  
0.03125°C LSb Remote Temperature  
Resolution with Digital Filter Enabled  
DESCRIPTION  
LM95233 is an 11-bit digital temperature sensor with  
a 2-wire System Management Bus (SMBus) interface  
that can monitor the temperature of two remote  
diodes as well as its own temperature. The LM95233  
can be used to very accurately monitor the  
temperature of up to two external devices such as  
microprocessors, graphics processors or diode-  
connected 2N3904s. The LM95233's TruTherm™  
BJT beta compensation technology allows sensing of  
90nm or 65nm process thermal diodes accurately.  
•
•
•
+127.875°C/–128°C and 0°C/255°C Remote  
Ranges  
Programmable Digital Filters and Analog Front  
End Filter  
Remote Diode Fault Detection, Model  
Selection and Offset Correction  
•
•
Mask and Status Register Support  
3 Programmable TCRIT Outputs with  
Programmable Shared Hysteresis  
The LM95233 reports temperature in two different  
formats for +127.875°C/–128°C range and 0°C/255°C  
range. The LM95233 TCRIT1, TCRIT2 and TCRIT3  
outputs are triggered when any unmasked channel  
exceeds its corresponding programmable limit and  
can be used to shutdown the system, to turn on the  
system fans or as a microcontroller interrupt function.  
The current status of the TCRIT1, TCRIT2 and  
TCRIT3 pins can be read back from the status  
registers. Mask registers are available for further  
control of the TCRIT outputs. LM95233's remote  
temperature channels have programmable digital  
filters to minimize unwanted TCRIT events when  
temperature spikes are encountered.  
•
•
Programmable Conversion Rate and Shutdown  
Mode One-Shot Conversion Control  
SMBus 2.0 Compatible Interface, Supports  
TIMEOUT  
•
•
Three-Level Address Pin  
14-Pin WSON Package  
APPLICATIONS  
•
Processor/Computer System Thermal  
Management (e.g. Laptop, Desktop,  
Workstations, Server)  
For optimum flexibility and accuracy each LM95233  
channel includes, registers for sub-micron process or  
2N3904 diode model selection as well as offset  
•
•
Electronic Test Equipment  
Office Electronics  
correction.  
A
three level address pin allows  
connection of up to 3 LM95233s to the same SMBus  
master. The LM95233 includes power saving  
functions such as: programmable conversion rate,  
shutdown mode, and turn off of unused channels.  
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
3
TruTherm is a trademark of Texas Instruments.  
All other 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 © 2006–2013, Texas Instruments Incorporated  
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