ADT7468 datasheet(1/80 Pages) AD

Numer części	ADT7468

Szczegółowy opis	dBCool??Remote Thermal Controller and Voltage Monitor

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dBCool™ Remote Thermal

Controller and Voltage Monitor

ADT7468

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

registered trademarks 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

www.analog.com

Fax: 781.326.8703

FEATURES

Monitors up to 5 voltages

Controls and monitors up to 4 fans

High and low frequency fan drive signal

1 on-chip and 2 remote temperature sensors

Series resistance cancellation on the remote channel

Extended temperature measurement range, up to 191°C

Dynamic TMIN control mode optimizes system acoustics

intelligently

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 THERM input

2-wire, 3-wire, and 4-wire fan speed measurement

Limit comparison of all monitored values

Meets SMBus 2.0 electrical specifications

(fully SMBus 1.1 compliant)

GENERAL DESCRIPTION

The ADT7468 dBCOOLTM controller is a thermal monitor and

multiple PWM fan controller for noise-sensitive or power-

sensitive applications requiring active system cooling. The

ADT7468 can drive a fan using either a low or high frequency

drive signal, monitor the temperature of up to two remote

sensor diodes plus its own internal temperature, and measure

and control the speed of up to four 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. A unique dynamic TMIN control mode

enables the system thermals/acoustics to be intelligently

managed. The effectiveness of the system’s thermal solution can

be monitored using the THERM input. The ADT7468 also

provides critical thermal protection to the system using the

bidirectional THERM pin as an output to prevent system or

component overheating.

FUNCTIONAL BLOCK DIAGRAM

INPUT

SIGNAL

CONDITIONING

AND

ANALOG

MULTIPLEXER

GND

SERIAL BUS

INTERFACE

SCL

SDA

VALUE AND

LIMIT

REGISTERS

LIMIT

COMPARATORS

INTERRUPT

STATUS

REGISTERS

BAND GAP

TEMP SENSOR

VCC TO ADT7468

ADDRESS

POINTER

REGISTER

PWM

CONFIGURATION

REGISTERS

INTERRUPT

MASKING

VCC

D1+

D1–

D2+

D2–

+5VIN

THERMAL

PROTECTION

PERFORMANCE

MONITORING

PWM REGISTERS

AND

CONTROLLERS

HF & LF

PWM1

PWM2

PWM3

ACOUSTIC

ENHANCEMENT

CONTROL

BAND GAP

REFERENCE

10-BIT

ADC

ADT7468

AUTOMATIC

FAN SPEED

CONTROL

DYNAMIC

TMIN

CONTROL

FAN SPEED

COUNTER

TACH1

TACH2

TACH3

TACH4

ACOUSTIC

ENHANCEMENT

CONTROL

SRC

+12VIN

+2.5VIN

VCCP

VID5

VID4

VID3

VID2

VID1

VID0

THERM

SMBALERT

Figure 1.

Podobny numer części - ADT7468

Producent	Numer części	Arkusz danych	Szczegółowy opis
ON Semiconductor	ADT7468	1Mb / 81P	dBCool짰 Remote Thermal Controller and Voltage Monitor May 2010 ??Rev. 3
	ADT7468ARQ	1Mb / 81P	dBCool짰 Remote Thermal Controller and Voltage Monitor May 2010 ??Rev. 3
	ADT7468ARQ-REEL	1Mb / 81P	dBCool짰 Remote Thermal Controller and Voltage Monitor May 2010 ??Rev. 3
	ADT7468ARQ-REEL7	1Mb / 81P	dBCool짰 Remote Thermal Controller and Voltage Monitor May 2010 ??Rev. 3
	ADT7468ARQZ	1Mb / 81P	dBCool짰 Remote Thermal Controller and Voltage Monitor May 2010 ??Rev. 3

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Podobny opis - ADT7468

Producent	Numer części	Arkusz danych	Szczegółowy opis
Analog Devices	ADT7476	1Mb / 72P	dBCool Remote Thermal Controller and Voltage Monitor REV. A
ON Semiconductor	ADT7476A	613Kb / 67P	dBCOOL Remote Thermal Controller and Voltage Monitor May, 2010 ??Rev. 3
	ADM1027	1Mb / 56P	dBCOOL??Remote Thermal Controller and Voltage Monitor May 2010 - Rev. 3
	ADT7476	620Kb / 67P	dBCOOL Remote Thermal Controller and Voltage Monitor May, 2010 ??Rev. 6
Analog Devices	ADT7466	1Mb / 48P	dBCool Remote Thermal Controller and Voltage Monitor REV. 0
	ADT7476A	1Mb / 72P	dBCool Remote Thermal Controller and Voltage Monitor REV. 0
	ADM1027	1,008Kb / 56P	dBCOOL-TM Remote Thermal Controller and Voltage Monitor REV. A
	ADT7467	1Mb / 80P	dBCool Remote Thermal Monitor and Fan Controller REV. 0
ON Semiconductor	ADT7475_1110	639Kb / 58P	dbCOOL Remote Thermal Monitor and Fan Controller October, 2011 ??Rev. 5
Analog Devices	ADT7473	1Mb / 76P	dBCool Remote Thermal Monitor and Fan Controller REV. A

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