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LM75_05 PDF预览

LM75_05

更新时间: 2024-11-06 04:20:03
品牌 Logo 应用领域
美国国家半导体 - NSC 传感器温度传感器
页数 文件大小 规格书
18页 734K
描述
Digital Temperature Sensor and Thermal Watchdog with Two-Wire Interface

LM75_05 数据手册

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October 2005  
LM75  
Digital Temperature Sensor and Thermal Watchdog with  
Two-Wire Interface  
n Register readback capability  
n Power up defaults permit stand-alone operation as  
General Description  
The LM75 is a temperature sensor, Delta-Sigma analog-to-  
thermostat  
digital converter, and digital over-temperature detector with  
n Shutdown mode to minimize power consumption  
n Up to 8 LM75s can be connected to a single bus  
n UL Recognized Component  
I2C® interface. The host can query the LM75 at any time to  
read temperature. The open-drain Overtemperature Shut-  
down (O.S.) output becomes active when the temperature  
exceeds a programmable limit. This pin can operate in either  
“Comparator” or “Interrupt” mode.  
Key Specifications  
The host can program both the temperature alarm threshold  
(TOS) and the temperature at which the alarm condition goes  
away (THYST). In addition, the host can read back the con-  
tents of the LM75’s TOS and THYST registers. Three pins (A0,  
A1, A2) are available for address selection. The sensor  
powers up in Comparator mode with default thresholds of  
j
Supply Voltage  
3.0V to 5.5V  
250 µA (typ)  
1 mA (max)  
4 µA (typ)  
2˚C(max)  
j
Supply Current  
operating  
shutdown  
j
Temperature Accuracy −25˚C to 100˚C  
−55˚C to 125˚C  
80˚C TOS and 75˚C THYST  
.
3˚C(max)  
The LM75’s 3.0V to 5.5V supply voltage range, low supply  
current and I2C interface make it ideal for a wide range of  
applications. These include thermal management and pro-  
tection applications in personal computers, electronic test  
equipment, and office electronics.  
Applications  
n System Thermal Management  
n Personal Computers  
n Office Electronics  
Features  
n Electronic Test Equipment  
n SOP-8 and Mini SOP-8 (MSOP) packages save space  
n I2C Bus interface  
n Separate open-drain output pin operates as interrupt or  
comparator/thermostat output  
Simplified Block Diagram  
01265801  
2
I
C® is a registered trademark of Philips Corporation.  
© 2005 National Semiconductor Corporation  
DS012658  
www.national.com  

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