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ADT7463 Datasheet

dB COOL Remote Thermal Controller and Voltage Monitor

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ADT7463 pdf
a
dBCOOLRemote Thermal
Controller and Voltage Monitor
ADT7463*
www.datasFhEeAetT4uU.cRoEmS
Monitors up to 5 Supply Voltages
Controls and Monitors up to 4 Fan Speeds
1 On-Chip and 2 Remote Temperature Sensors
Monitors up to 6 Processor VID Bits
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 and 3-Wire Fan Speed Measurement
Limit Comparison of All Monitored Values
Meets SMBus 2.0 Electrical Specifications
(Fully SMBus 1.1 Compliant)
GENERAL DESCRIPTION
The ADT7463 dBCOOL controller is a complete systems
monitor and multiple PWM fan controller for noise-sensitive
applications requiring active system cooling. It can monitor
12 V, 5 V, and 2.5 V CPU supply voltages, 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 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 ADT7463 also provides critical thermal
protection to the system using the bidirectional THERM pin
as an output to prevent system or component overheating.
APPLICATIONS
Low Acoustic Noise PCs
Networking and Telecommunications Equipment
FUNCTIONAL BLOCK DIAGRAM
VID5
VID4
VID3
VID2
VID1
VID0
PWM1
PWM2
PWM3
TACH1
TACH2
TACH3
TACH4
ADDR
SELECT ADDR EN SCL SDA SMBALERT
PWM
REGISTERS
AND
CONTROLLERS
VID
REGISTER
ACOUSTIC
ENHANCEMENT
CONTROL
FAN SPEED
COUNTER
PERFORMANCE
MONITORING
SMBUS
ADDRESS
SELECTION
SERIAL BUS
INTERFACE
AUTOMATIC
FAN SPEED
CONTROL
ADDRESS
POINTER
REGISTER
DYNAMIC
TMIN
CONTROL
PWM
CONFIGURATION
REGISTERS
INTERRUPT
MASKING
THERM
VCC
D1+
D1–
D2+
D2–
VCC
+5VIN
+12VIN
+2.5VIN
VCCP
VCC TO ADT7463
BAND GAP
TEMP. SENSOR
THERMAL
PROTECTION
ADT7463
INPUT
SIGNAL
CONDITIONING
AND
ANALOG
MULTIPLEXER
10-BIT
ADC
BAND GAP
REFERENCE
GND
INTERRUPT
STATUS
REGISTERS
LIMIT
COMPARATORS
VALUE AND
LIMIT
REGISTERS
*Protected by U.S. Patent Nos. 6,188,189; 6,169,442; 6,097,239; 5,982,221; and 5,867,012. Other patents pending.
REV. B
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. 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 companies.
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 © 2003 Analog Devices, Inc. All rights reserved.


Analog Devices Semiconductor Electronic Components Datasheet

ADT7463 Datasheet

dB COOL Remote Thermal Controller and Voltage Monitor

No Preview Available !

ADT7463 pdf
ADT7463–SPECIFICATIONS1, 2, 3, 4
(TA = TMIN to TMAX, VCC = VMIN to VMAX, unless otherwise noted.)
Parameter
POWER SUPPLY
Supply Voltage
Supply Current, ICC
Min
3.0
wwTwE.dMatPaEshReAetT4uU.cRoEm-TO-DIGITAL CONVERTER
Local Sensor Accuracy
Resolution
Remote Diode Sensor Accuracy
Resolution
Remote Sensor Source Current
ANALOG-TO-DIGITAL CONVERTER
(INCLUDING MUX AND ATTENUATORS)
Total Unadjusted Error, TUE
Differential Nonlinearity, DNL
Power Supply Sensitivity
Conversion Time (Voltage Input)
Conversion Time (Local Temperature)
Conversion Time (Remote Temperature)
Total Monitoring Cycle Time
Total Monitoring Cycle Time
Input Resistance
FAN RPM-TO-DIGITAL CONVERTER
Accuracy
100
Full-Scale Count
Nominal Input RPM
Internal Clock Frequency
OPEN-DRAIN DIGITAL OUTPUTS,
PWM1–PWM3, XTO
Current Sink, IOL
Output Low Voltage, VOL
High Level Output Current, IOH
OPEN-DRAIN SERIAL DATA
BUS OUTPUT (SDA)
Output Low Voltage, VOL
High Level Output Current, IOH
SMBUS DIGITAL INPUTS
(SCL, SDA)
Input High Voltage, VIH
Input Low Voltage, VIL
Hysteresis
DIGITAL INPUT LOGIC LEVELS
(VID0–VID5)
Input High Voltage, VIH
Input Low Voltage, VIL
Input High Voltage, VIH
Input Low Voltage, VIL
82.8
2.0
1.7
0.8
Typ
5.0
± 0.5
0.25
± 0.5
0.25
180
11
Max
5.5
3
20
± 1.5
±3
± 1.5
± 2.5
±3
Unit Test Conditions/Comments
V
mA Interface Inactive, ADC Active
mA Standby Mode
ЊC 0ЊC Յ TA Յ 70ЊC
ЊC –40ЊC Յ TA Յ +120ЊC
ЊC
ЊC 0ЊC Յ TA Յ 70ЊC; 0ЊC Յ TD Յ 120ЊC
ЊC 0ЊC Յ TA Յ 105ЊC; 0ЊC Յ TD Յ 120ЊC
ЊC 0ЊC Յ TA Յ 120ЊC; 0ЊC Յ TD Յ 120ЊC
ЊC
mA High Level
mA Low Level
± 0.1
11.38
12.09
25.59
120.17
13.51
140
± 1.5
±1
13
13.50
28
134.50
15
200
%
LSB
%/V
ms
ms
ms
ms
ms
kW
Averaging Enabled
Averaging Enabled
Averaging Enabled
Averaging Enabled
Averaging Disabled
109
329
5,000
10,000
90.0
±7
± 11
± 13
65,535
97.2
%
%
%
RPM
RPM
RPM
RPM
kHz
0ЊC Յ TA Յ 70ЊC
0ЊC Յ TA Յ 105ЊC
–40ЊC Յ TA Յ +120ЊC
Fan Count = 0xBFFF
Fan Count = 0x3FFF
Fan Count = 0x0438
Fan Count = 0x021C
8.0 mA
0.4 V
IOUT = –8.0 mA, VCC = 3.3 V
0.1 1
mA VOUT = VCC
0.4 V
IOUT = –4.0 mA, VCC = 3.3 V
0.1 1
mA VOUT = VCC
0.4
500
V
V
mV
V
0.8 V
V
0.4 V
Bit 6 (THLD) Reg. 0x43 = 0
(VID Threshold = 1 V)
Bit 6 (THLD) Reg. 0x43 = 1
(VID Threshold = 0.6 V)
–2– REV. B


Part Number ADT7463
Description dB COOL Remote Thermal Controller and Voltage Monitor
Maker Analog Devices
Total Page 30 Pages
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