ADT7468 datasheet(39/80 Pages) AD

39 / 80 page

ADT7468

Rev. 0 | Page 39 of 80

RECOMMENDED IMPLEMENTATION 2

Configuring the ADT7468 as in Figure 52 provides the system

designer with the following features:

Six VID inputs (VID0 to VID5) for VRM10 support.

Three PWM outputs for fan control of up to three fans.

(All three fans can be individually controlled.)

Three TACH fan speed measurement inputs.

VCC measured internally through Pin 4.

CPU core voltage measurement (VCORE).

2.5 V measurement input used to monitor CPU current

(connected to VCOMP output of ADP316x VRM controller).

This is used to determine CPU power consumption.

5 V measurement input.

VRM temperature using local temperature sensor.

CPU temperature measured using the Remote 1

temperature channel.

10. Ambient temperature measured through the Remote 2

temperature channel.

11. If not using VID5, this pin can be reconfigured as the 12 V

monitoring input.

12. Bidirectional THERM pin allows the monitoring of

PROCHOT output from an Intel P4 processor, for example,

or can be used as an overtemperature THERM output.

FRONT

CHASSIS

FAN

TACH2

ADT7468

PWM3

REAR

CHASSIS

FAN

AMBIENT

TEMPERATURE

ADP316x

VRM

CONTROLLER

VCOMP

TACH3

D1+

D1–

3.3VSB

12V/VID5

CURRENT

VCORE

GND

PWM1

TACH1

VID[0:4]/VID[0.5]

D2+

D2–

THERM

SDA

SCL

PROCHOT

5(VRM9)/6(VRM10)

CPU FAN

CPU

ICH

Figure 52. Recommended Implementation 2

ADT7468 Datasheet(PDF) 39 Page - Analog Devices

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