Datasheet > LM63EVAL

LM63EVAL

更新时间： 2024-11-23 22:14:07

品牌	Logo	应用领域
美国国家半导体 - NSC		风扇二极管传感器温度传感器
页数	文件大小	规格书
28页	334K
描述
【1C/【3C Accurate Remote Diode Digital Temperature Sensor with Integrated Fan Control

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中文翻译

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LM63EVAL 数据手册

May 2003

LM63

1˚C/ 3˚C Accurate Remote Diode Digital Temperature

Sensor with Integrated Fan Control

n 10 bit plus sign remote diode temperature data format,

with 0.125˚C resolution

n SMBus 2.0 compatible interface, supports TIMEOUT

n LM86-compatible pinout

n LM86-compatible register set

n 8-pin SOIC package

General Description

The LM63 is a remote diode temperature sensor with inte-

grated fan control. The LM63 accurately measures: (1) its

own temperature and (2) the temperature of a diode-

connected transistor, such as a 2N3904, or a thermal diode

commonly found on Computer Processors, Graphics Pro-

cessor Units (GPU) and other ASIC’s. The LM63 remote

temperature sensor’s accuracy is factory trimmed for the

series resistance and 1.0021 non-ideality of the Intel^®0.13

µm Pentium^®4 and Mobile Pentium 4 Processor-M thermal

diode. The LM63 has an offset register to correct for errors

caused by different non-ideality factors of other thermal di-

Key Specifications

Remote Diode Temp Accuracy

(with quantization

error)

Ambient

Temp

Diode

Temp

I_PWML

Max

Version

odes.

For

the

latest

information

contact

Error

hardware.monitor.team nsc.com.

30 to 50˚C 60 to 100˚C 5 mA

0 to 85˚C 25 to 125˚C 8 mA

LM63C

LM63D

All

1.0˚C

3.0˚C

The LM63 also features an integrated, pulse-width-

modulated (PWM), open-drain fan control output. Fan speed

is a combination of the remote temperature reading, the

lookup table and the register settings. The 8-step Lookup

Table enables the user to program a non-linear fan speed vs.

temperature transfer function often used to quiet acoustic

fan noise.

Local Temp Accuracy (includes quantization error)

Ambient Temp

25˚C to 125˚C

Supply Voltage

Supply Current

Max Error

3.0˚C

3.0 V to 3.6 V

1.3 mA (typ)

Features

n Accurately senses diode-connected 2N3904 transistors

or thermal diodes on-board large processors or ASIC’s

n Accurately senses its own temperature

Applications

n Computer Processor Thermal Management

(Laptop, Desktop, Workstations, Servers)

n Graphics Processor Thermal Management

n Electronic Test Equipment

n Projectors

n Factory trimmed for Intel Pentium 4 and Mobile Pentium

4 Processor-M thermal diodes

n Integrated PWM fan speed control output

n Acoustic fan noise reduction with User-programmable

8-step Lookup Table

n Office Equipment

n Industrial Controls

n Multi-function, user-selectable pin for either ALERT

output, or Tachometer input, functions

n Tachometer input for measuring fan RPM

n Offset register can adjust for a variety of thermal diodes

Connection Diagram

20057001

Intel^®and Pentium^®are registered trademarks of Intel Corporation.

DS200570

www.national.com

12 3 4 5 6 7...28

中文翻译

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