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ADT7468

Analog Devices
Part Number ADT7468
Manufacturer Analog Devices
Description Remote Thermal Controller and Voltage Monitor
Published Jun 10, 2009
Detailed Description dBCool™ Remote Thermal Controller and Voltage Monitor ADT7468 www.datasheet4u.com FEATURES GENERAL DESCRIPTION The ADT7...
Datasheet PDF File ADT7468 PDF File

ADT7468
ADT7468

Overview
dBCool™ Remote Thermal Controller and Voltage Monitor ADT7468 www.
datasheet4u.
com FEATURES GENERAL DESCRIPTION The ADT7468 dBCOOLTM controller is a thermal monitor and multiple PWM fan controller for noise-sensitive or powersensitive 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.
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) FUNCTIONAL BLOCK DIAGRAM SCL VID5 VID4 VID3 VID2 VID1 VID0 PWM1 PWM2 PWM3 PWM REGISTERS AND CONTROLLERS HF & LF ACOUSTIC ENHANCEMENT CONTROL AUTOMATIC FAN SPEED CONTROL ADDRESS POINTER REGIS...


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