LM64CILQ-F Datasheet

IC型號：
LM64CILQ-F
PDF描述：
【1∑C Remote Diode Temperature Sensor with PWM Fan Control ...
文件大小：
371.59KB
PDF頁數(shù)：
29頁
芯片廠家：
NSC

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LM64

鹵

1藲C Remote Diode Temperature Sensor with PWM Fan Control and 5 GPIO鈥檚

December 2003

LM64

鹵

1藲C Remote Diode Temperature Sensor with PWM Fan

Control and 5 GPIO鈥檚

General Description

The LM64 is a remote diode temperature sensor with PWM

fan control. The LM64 accurately measures its own tempera-

ture and that of a remote diode. The LM64 remote tempera-

ture accuracy is factory trimmed for a MMBT3904 diode-

connected transistor with a 16藲C offset for high

temperatures. T

ACTUAL DIODE JUNCTION

= T

LM64

+ 16藲C

The LM64 features a PWM, open-drain, fan control output, 5

GPIO (General Purpose Input/Output) and 5 GPD (General

Purpose Default) pins. The 8-step Lookup Table allows for a

non-linear fan speed vs. temperature transfer function often

used to quiet acoustic fan noise.

Key Specifications

Remote Diode Temperature Accuracy (includes

quantization error)

Ambient Temp

30藲C to 50藲C

0藲C to 85藲C

Diode Temp

120藲C to 140藲C

25藲C to 140藲C

Max Error

鹵

1.0藲C (max)

鹵

3.0藲C (max)

Local Temp Accuracy (includes quantization error)

Ambient Temp

25藲C to 125藲C

Power Supply Requirements

Max Error

鹵

3.0藲C (max)

Features

Accurately senses remote and local diode temperatures

Integrated PWM fan speed control output

Programmable 8-step Lookup Table for quieting fans

ALERT and T_Crit open-drain outputs

Tachometer input for measuring fan RPM

10 bit plus sign remote diode temperature data format,

with 0.125藲C resolution

SMBus 2.0 compatible interface, supports TIMEOUT

5 General Purpose Input/Output pins

5 General Purpose Default input pins

24-pin LLP package

Supply DC Voltage

Supply DC Current

3.0 V to 3.6 V

1.1 mA (typ)

Applications

Computer Processor Thermal Management

Graphics Processor Thermal Management

Voltage Regulator Modules

Electronic Instrumentation

Power Supplies

Projectors

Connection Diagram

20065501

漏 2003 National Semiconductor Corporation

DS200655

www.national.com

制造商
National Semiconductor (TI)
輸出類型
Digital
準(zhǔn)確性
+/- 1 C, +/- 3 C
數(shù)字輸出 - 總線接口
Serial (2-Wire)
最大工作溫度
+ 85 C
最小工作溫度
0 C
封裝
Reel
描述/功能
Temperature Sensor
數(shù)字輸出 - 位數(shù)
8 bit, 10 bit+ Sign
工作電源電壓
3 V to 3.6 V
工廠包裝數(shù)量
1000

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LM64CILQ-F Datasheet

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