參數(shù)資料
型號: ADT7466ARQZ-REEL7
廠商: ANALOG DEVICES INC
元件分類: 模擬信號調(diào)理
英文描述: dBCool Remote Thermal Controller and Voltage Monitor
中文描述: SPECIALTY ANALOG CIRCUIT, PDSO16
封裝: LEAD FREE, MO-137AB, QSOP-16
文件頁數(shù): 1/48頁
文件大小: 1269K
代理商: ADT7466ARQZ-REEL7
dB
Cool
Remote Thermal
Controller and Voltage Monitor
ADT7466
FEATURES
Monitors two analog voltages or thermistor temperature
inputs
One on-chip and up to two remote temperature sensors with
series resistance cancellation
Controls and monitors the speed of up to two fans
Automatic fan speed control mode controls system
cooling based on measured temperature
Enhanced acoustic mode dramatically reduces user
perception of changing fan speeds
Thermal protection feature via THERM output monitors
performance impact of Intel Pentium 4 processor
thermal control circuit via PROCHOT input
3-wire fan speed measurement
Limit comparison of all monitored values
SMBus 1.1 serial interface
registered trademarks are the property of their respective owners.
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
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
2005 Analog Devices, Inc. All rights reserved.
www.analog.com
APPLICATIONS
Low acoustic noise notebook PCs
GENERAL DESCRIPTION
The ADT7466
dB
Cool controller is a complete thermal monitor
and dual fan controller for noise-sensitive applications
requiring active system cooling. It can monitor two analog
voltages or the temperature of two thermistors, plus its own
supply voltage. It can monitor the temperature of up to two
remote sensor diodes, plus its own internal temperature. It can
measure and control the speed of up to two fans so that they
operate at the lowest possible speed for minimum acoustic
noise. The automatic fan speed control loop optimizes fan
speed for a given temperature. The effectiveness of the system’s
thermal solution can be monitored using the PROCHOT input
to time and monitor the PROCHOT output of the processor.
FUNCTIONAL BLOCK DIAGRAM
INTERFACE
CREGISTERS
THERM
REGISTER
IMASKING
ADDRESS
POINTER
ISTATUS
REGISTERS
VALIMIT
REGISTERS
ACOUSTIC
ENCONTROL
FAN SPEED
CONTROL
COMLIMIT
FAN
SPEED
V_FAN_ON
CONTROL
DAC
DAC
V
CC
GND
REFOUT
SCL
SDA ALERT
BAND GAP
REFERENCE
ADC
DRIVE1
DRIVE2
TACH1
TACH2
FANLOCK
FAN1_ON/
PROCHOT/
THERM
D1+
D1–
AIN1/TH1/D2–
AIN2/TH2/D2+
RESERIES
CANCELLATION
BAND GAP
TESENSOR
CRESERIES
INPUT
COSAND
MANALOG
FAN1
ENABLE
PROCHOT
ADT7466
0
Figure 1.
Protected by U.S. Patent Numbers 6,188,189; 6,169,442; 6,097,239; 5,982,221; 5,867,012.
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