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ADT7490ARQZ-REEL7 PDF预览

ADT7490ARQZ-REEL7

更新时间: 2024-11-23 04:04:47
品牌 Logo 应用领域
亚德诺 - ADI 模拟IC风扇信号电路光电二极管监控控制器
页数 文件大小 规格书
76页 1623K
描述
dBCool Remote Thermal Monitor and Fan Controller with PECI Interface

ADT7490ARQZ-REEL7 数据手册

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dBCool Remote Thermal Monitor and Fan  
Controller with PECI Interface  
ADT7490  
FEATURES  
GENERAL DESCRIPTION  
Temperature measurement:  
1 local on-chip temperature sensor  
2 remote temperature sensors  
The ADT7490 is a dBCool® thermal monitor and multiple  
PWM fan controller for noise-sensitive or power-sensitive  
applications requiring active system cooling. The ADT7490  
3-current external temperature sensors with series  
resistance cancellation (SRC)  
PECI interface for CPU thermal information and support of  
up to 4 PECI inputs on one pin  
Fan drive and fan speed control  
3 high frequency or low frequency PWM outputs for use  
with 3-wire or 4-wire fans  
4 TACH inputs to measure fan speed  
OS independent automatic fan speed control based on  
thermal information  
Dynamic TMIN control mode to optimize system acoustics  
Default startup at 100% PWM for all fans for robust  
operation  
Bidirectional THERM/SMBALERT pin to flag out-of-limit and  
overtemperature conditions  
includes a local temperature sensor, two remote temperature  
sensors including series resistance cancellation, and monitors  
CPU temperature with a PECI interface. The ADT7490 can  
drive a fan using either a low or high frequency drive signal,  
and measure and control the speed of up to four fans so they  
operate at the lowest possible speed for minimum acoustic noise.  
The automatic fan speed control loop optimizes fan speed  
for a given temperature using the PECI, remote, or local  
temperature information. The effectiveness of the systems  
THERM  
thermal solution can be monitored using the  
The ADT7490 also provides critical thermal protection to  
THERM SMBALERT  
pin as  
input.  
the system using the bidirectional  
/
an output to prevent system or component overheating.  
GPIO functionality to support extra features  
Can be used for loadline setting for voltage regulation,  
LED control, or other functions  
I
MON monitoring for CPU current and power information  
Footprint and register compatible with ADT7473/ADT7475/  
ADT7476/ADT7476A family of fan controllers  
SMBus interface with addressing capability for up to  
3 devices  
APPLICATIONS  
Personal Computers  
Servers  
Rev. 0  
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  
rights of third parties that may result from its 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 and registeredtrademarks arethe property of their respective owners.  
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.  
Tel: 781.329.4700  
Fax: 781.461.3113  
www.analog.com  
©2007 Analog Devices, Inc. All rights reserved.  
 

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