Datasheet > LM75_05

LM75_05

更新时间： 2024-11-24 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

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LM75_05 数据手册

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

(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_OSand T_HYSTregisters. Three pins (A0,

A1, A2) are available for address selection. The sensor

powers up in Comparator mode with default thresholds of

Supply Voltage

3.0V to 5.5V

250 µA (typ)

1 mA (max)

4 µA (typ)

2˚C(max)

Supply Current

operating

shutdown

Temperature Accuracy −25˚C to 100˚C

−55˚C to 125˚C

80˚C T_OSand 75˚C T_HYST

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

C^®is a registered trademark of Philips Corporation.

DS012658

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