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ADT7466

Analog Devices
Part Number ADT7466
Manufacturer Analog Devices
Description dBCool Remote Thermal Controller and Voltage Monitor
Published Sep 23, 2005
Detailed Description dBCool® Remote Thermal Controller and Voltage Monitor ADT7466 FEATURES Monitors two analog voltages or thermistor temper...
Datasheet PDF File ADT7466 PDF File

ADT7466
ADT7466

Overview
dBCool® 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 GENERAL DESCRIPTION The ADT7466 dBCool 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.
APPLICATIONS Low acoustic noise notebook PCs FUNCTIONAL BLOCK DIAGRAM VCC SCL SDA ALERT DRIVE1 8-BIT DAC V_FAN_MIN V_FAN_ON CONTROL ACOUSTIC ENHANCEMENT CONTROL SERIAL BUS INTERFACE ADDRESS POINTER REGISTER CONFIGURATION REGISTERS THERM REGISTER INTERRUPT MASKING INTERRUPT STATUS REGISTERS DRIVE2 8-BIT DAC AUTOMATIC FAN SPEED CONTROL FAN SPEED MONITOR FAN1 ENABLE TACH1 TACH2 FANLOCK FAN1_ON/ PROCHOT/ THERM PROCHOT D1+ D1– SERIES RESISTANCE CANCELLATION SERIES RESISTANCE CANCELLATION BAND GAP TEMPERATURE SENSOR INPUT SIGNAL CONDITIONING AND ANALOG MULTIPLEXER 1...


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