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LM75CIMM-5 参数 Datasheet PDF下载

LM75CIMM-5图片预览
型号: LM75CIMM-5
PDF下载: 下载PDF文件 查看货源
内容描述: 数字温度传感器和热看门狗具有双线接口 [Digital Temperature Sensor and Thermal Watchdog with Two-Wire Interface]
分类和应用: 传感器换能器温度传感器输出元件
文件页数/大小: 18 页 / 734 K
品牌: NSC [ NATIONAL SEMICONDUCTOR ]
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LM75 Digital Temperature Sensor and Thermal Watchdog with Two-Wire Interface
October 2005
LM75
Digital Temperature Sensor and Thermal Watchdog with
Two-Wire Interface
General Description
The LM75 is a temperature sensor, Delta-Sigma analog-to-
digital converter, and digital over-temperature detector with
I
2
C
®
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.
The host can program both the temperature alarm threshold
(T
OS
) and the temperature at which the alarm condition goes
away (T
HYST
). In addition, the host can read back the con-
tents of the LM75’s T
OS
and T
HYST
registers. Three pins (A0,
A1, A2) are available for address selection. The sensor
powers up in Comparator mode with default thresholds of
80˚C T
OS
and 75˚C T
HYST
.
The LM75’s 3.0V to 5.5V supply voltage range, low supply
current and I
2
C 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.
n
Register readback capability
n
Power up defaults permit stand-alone operation as
thermostat
n
Shutdown mode to minimize power consumption
n
Up to 8 LM75s can be connected to a single bus
n
UL Recognized Component
Key Specifications
j
Supply Voltage
j
Supply Current
3.0V to 5.5V
operating
shutdown
250 µA (typ)
1 mA (max)
4 µA (typ)
j
Temperature Accuracy
−25˚C to 100˚C
−55˚C to 125˚C
±
2˚C(max)
±
3˚C(max)
Applications
n
n
n
n
System Thermal Management
Personal Computers
Office Electronics
Electronic Test Equipment
Features
n
SOP-8 and Mini SOP-8 (MSOP) packages save space
n
I
2
C Bus interface
n
Separate open-drain output pin operates as interrupt or
comparator/thermostat output
Simplified Block Diagram
01265801
I2C
®
is a registered trademark of Philips Corporation.
© 2005 National Semiconductor Corporation
DS012658
www.national.com