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ADT7470ARQZ

更新时间： 2024-11-22 12:27:23
品牌 Logo 应用领域
亚德诺 - ADI 风扇传感器换能器温度传感器输出元件控制器PC
页数 文件大小 规格书
40页 580K
描述
Temperature Sensor Hub and Fan Controller

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ADT7470ARQZ 数据手册

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Temperature Sensor Hub and Fan Controller  
Data Sheet  
ADT7470  
FEATURES  
Monitors up to 10 remote temperature sensors  
Monitors and controls speed of up to 4 fans independently  
PWM outputs drive each fan under software control  
GENERAL DESCRIPTION  
The ADT74701 controller is a multichannel temperature sensor  
and PWM fan controller and fan speed monitor for systems  
requiring active cooling. It is designed to interface directly to  
an I2C® bus. The ADT7470 can monitor up to 10 daisy-chained  
TMP05 temperature sensors. It can also monitor and control  
the speed of four fans, in automatic or in manual control loops.  
FULL_SPEED  
input allows fans to be blasted to maximum  
speed by external hardware  
SMBALERT  
interrupt signals failures to system controller  
Three-state ADDR pin allows up to 3 devices on a single bus  
Temperature decoder interprets TMP05 temperature sensors  
and communicates values over I2C bus  
Limit comparison of all monitored values  
Supports fast I2C standard (400 kHz max)  
Meets SMBus 2.0 electrical specifications  
(fully SMBus 1.1-compliant)  
FULL_SPEED  
A
input is provided to allow the fans to be  
blasted to maximum speed, via external hardware control,  
under extreme thermal conditions or on system startup. An  
SMBALERT  
interrupt communicates error conditions such as  
fan under speed and over temperature measurements to the  
system service processor. Individual error conditions can then  
be read from status registers over the I2C bus.  
APPLICATIONS  
Servers  
Networking and telecommunications equipment  
Desktops  
FUNCTIONAL BLOCK DIAGRAM  
SMBALERT  
SDA SCL  
ADDR  
ADT7470  
SMBus  
ADDRESS  
SELECTION  
SERIAL BUS  
INTERFACE  
FULL_SPEED  
PWM1  
ADDRESS  
POINTER  
REGISTER  
PWM  
REGISTERS  
AND  
AUTOMATIC  
FAN SPEED  
CONTROL  
PWM  
CONFIG  
REGISTERS  
PWM2  
PWM3  
PWM4  
CONTROLLERS  
INTERRUPT  
MASKING  
TACH1  
TACH2  
TACH3  
TACH4  
FAN SPEED  
COUNTERS  
INTERRUPT  
STATUS  
REGISTERS  
TMP_START  
TMP_IN  
LIMIT  
COMPARATORS  
TEMPERATURE  
DECODER  
VALUE AND  
LIMIT  
REGISTERS  
Figure 1.  
1 Protected by Patent Numbers US6,169,442, US6,097,239, US5,982,221, US5,867,012. Other patents pending.  
Rev. E Document Feedback  
Information furnished by Analog Devices is believed to be accurate and reliable. However, no  
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other  
rightsof third parties that may result fromits use. Specifications subject to change without notice. No  
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.  
Trademarks andregisteredtrademarks are the property of their respective owners.  
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.  
Tel: 781.329.4700 ©2004–2013 Analog Devices, Inc. All rights reserved.  
Technical Support  
www.analog.com  
 
 
 
 
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ADT7470ARQZ 替代型号

型号 品牌 替代类型 描述 数据表
ADT7470ARQZ-REEL7 ADI

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ADT7470ARQZ-REEL ADI

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