LM76

更新时间： 2024-11-21 11:07:55

品牌	Logo	应用领域
德州仪器 - TI		温度传感传感器换能器温度传感器
页数	文件大小	规格书
22页	1242K
描述
具有警报功能和 I2C/SMBus 接口的 ±1°C 温度传感器

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LM76 数据手册

LM76

www.ti.com

SNIS109E –JANUARY 2000–REVISED MARCH 2013

LM76 ±0.5°C, ±1°C, 12-Bit + Sign Digital Temperature Sensor and Thermal Window

Comparator with Two-Wire Interface

Check for Samples: LM76

FEATURES

DESCRIPTION

The LM76 is a digital temperature sensor and thermal

window comparator with an I²C Serial Bus interface

with an accuracy of ±1°C. This accuracy for the

•

Window Comparison Simplifies Design of

ACPI Compatible Temperature Monitoring and

Control.

LM76CHM is specified for

a −10°C to 45°C

•

Serial Bus Interface

temperature range. The LM76CHM is specified with

an accuracy ±0.5°C at 25°C. The window-comparator

architecture of the LM76 eases the design of

temperature control systems conforming to the ACPI

(Advanced Configuration and Power Interface)

specification for personal computers. The open-drain

Interrupt (INT) output becomes active whenever

temperature goes outside a programmable window,

Separate Open-Drain Outputs for Interrupt and

Critical Temperature Shutdown

•

Shutdown Mode to Minimize Power

Consumption

Up to 4 LM76s can be Connected to a Single

Bus

while

separate Critical Temperature Alarm

12-bit + Sign Output; Full-scale Reading of

Over 127°C

(T_CRIT_A) output becomes active when the

temperature exceeds a programmable critical limit.

The INT output can operate in either a comparator or

event mode, while the T_CRIT_A output operates in

comparator mode only.

KEY SPECIFICATIONS

•

Supply Voltage 5.0V

Supply Current

The host can program both the upper and lower limits

of the window as well as the critical temperature limit.

Programmable hysterisis as well as a fault queue are

available to minimize false tripping. Two pins (A0, A1)

are available for address selection. The sensor

powers up with default thresholds of 2°C T_HYST, 10°C

T_LOW, 64°C T_HIGH, and 80°C T_CRIT.

–

Operating

–

250 µA (typ)

450 µA (max)

–

Shutdown

8 µA (max)

Temperature +25ºC ±0.5ºC (max)

Accuracy

–

The LM76's 5.0V supply voltage, Serial Bus interface,

12-bit + sign output, and full-scale range of over

127°C make it ideal for a wide range of applications.

These include thermal management and protection

applications in personal computers, electronic test

equipment, office electronics and bio-medical

applications.

•

–

–10ºC to +45ºC ±10°C (max)

70°C to 100°C ±1.0°C (max)

Resolution 0.0625°C

APPLICATIONS

•

System Thermal Management

Personal Computers

Office Electronics

HVAC

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.

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.

12 3 4 5 6 7...22

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