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ADM1031 の電気的特性と機能

ADM1031のメーカーはAnalog Devicesです、この部品の機能は「Intelligent Temperature Monitor and Dual PWM Fan Controller」です。


製品の詳細 ( Datasheet PDF )

部品番号 ADM1031
部品説明 Intelligent Temperature Monitor and Dual PWM Fan Controller
メーカ Analog Devices
ロゴ Analog Devices ロゴ 




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ADM1031 Datasheet, ADM1031 PDF,ピン配置, 機能
a
Intelligent Temperature
Monitor and Dual PWM Fan Controller
ADM1031
FEATURES
Optimized for Pentium® III: Allows Reduced Guardbanding
Software and Automatic Fan Speed Control
Automatic Fan Speed Control Allows Control Indepen-
dent of CPU Intervention after Initial Setup
Control Loop Minimizes Acoustic Noise and Battery
Consumption
Remote Temperature Measurement Accurate to 1؇C
Using Remote Diode (Two Channels)
0.125؇C Resolution on External Temperature Channels
Local Temperature Sensor with 0.25؇C Resolution
Pulsewidth Modulation Fan Control (PWM) for Two Fans
Programmable PWM Frequency
Programmable PWM Duty Cycle
Tach Fan Speed Measurement (Two Channels)
Analog Input To Measure Fan Speed of 2-Wire Fans
(Using Sense Resistor)
2-Wire System Management Bus (SMBus) with ARA
Support
Overtemperature THERM Output Pin for CPU Throttling
Programmable INT Output Pin
Configurable Offsets for Temperature Channels
3 V to 5.5 V Supply Range
Shutdown Mode to Minimize Power Consumption
Limit Comparison of All Monitored Values
APPLICATIONS
Notebook PCs, Network Servers and Personal Computers
Telecommunications Equipment
PRODUCT DESCRIPTION
The ADM1031 is an ACPI-compliant three-channel digital
thermometer and under/over temperature alarm, for use in
personal computers and thermal management systems. Opti-
mized for the Pentium III, the higher 1°C accuracy offered
allows systems designers to safely reduce temperature guard-
banding and increase system performance. Two Pulsewidth
Modulated (PWM) Fan Control outputs control the speed of
two cooling fans by varying output duty cycle. Duty cycle values
between 33%–100% allow smooth control of the fans. The speed
of each fan can be monitored via TACH inputs. The TACH
inputs may be reprogrammed as analog inputs, allowing fan
speeds for 2-wire fans to be measured via sense resistors. The
device will also detect a stalled fan. A dedicated Fan Speed
Control Loop provides control even without the intervention of
CPU software. It also ensures that if the CPU or system locks up,
each fan can still be controlled based on temperature measure-
ments, and the fan speed adjusted to correct any changes in
system temperature. Fan speed may also be controlled using
existing ACPI software. Two inputs (four pins) are dedicated to
remote temperature-sensing diodes with an accuracy of ± 1°C,
and an on-chip temperature sensor allows ambient temperature
to be monitored. The device has a programmable INT output
to indicate error conditions. There is a dedicated FAN_FAULT
output to signal fan failure. The THERM pin is a fail-safe output
for overtemperature conditions that can be used to throttle a
CPU clock.
FUNCTIONAL BLOCK DIAGRAM
VCC
PWM_OUT1
PWM_OUT2
TACH2 /AIN2
TACH1 /AIN1
D1+
D1–
D2+
D2–
*Patents pending.
Pentium is a registered
trademark of Intel Corporation.
REV. 0
ADM1031
PWM
CONTROLLERS
TACH SIGNAL
CONDITIONING
SLAVE
ADDRESS
REGISTER
FAN FILTER
REGISTER
FAN
CHARACTERISTICS
REGISTERS
FAN SPEED
CONFIG
REGISTER
FAN SPEED
COUNTER
BANDGAP
TEMPERATURE
SENSOR
ANALOG
MULTIPLEXER
ADC
2.5V
BANDGAP
REFERENCE
GND
SERIAL BUS
INTERFACE
ADDRESS
POINTER
REGISTER
INTERRUPT
STATUS
REGISTERS
LIMIT
COMPARATOR
VALUE AND LIMIT
REGISTERS
OFFSET
REGISTERS
CONFIGURATION
REGISTERS
ADD
SDA
SCL
INT (SMBALERT)
THERM
FAN_FAULT
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
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
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
© Analog Devices, Inc., 2001

1 Page





ADM1031 pdf, ピン配列
ADM1031
ABSOLUTE MAXIMUM RATINGS*
Positive Supply Voltage (VCC) . . . . . . . . . . . . . . . . . . . . .6.5 V
Voltage on Any Input or Output Pin . . . . . . . . –0.3 V to +6.5 V
Input Current at Any Pin . . . . . . . . . . . . . . . . . . . . . . . ± 5 mA
Package Input Current . . . . . . . . . . . . . . . . . . . . . . . ± 20 mA
Maximum Junction Temperature (TJMAX) . . . . . . . . . . 150°C
Storage Temperature Range . . . . . . . . . . . . –65°C to +150°C
Lead Temperature, Soldering
Vapor Phase 60 sec . . . . . . . . . . . . . . . . . . . . . . . . . . 215°C
Infrared 15 sec . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200°C
ESD Rating All Pins . . . . . . . . . . . . . . . . . . . . . . . . . . 2000 V
*Stresses above those listed under Absolute Maximum Ratings may cause perma-
nent damage to the device. This is a stress rating only; functional operation of the
device at these or any other conditions above those indicated in the operational
section of this specification is not implied. Exposure to absolute maximum rating
conditions for extended periods may affect device reliability.
THERMAL CHARACTERISTICS
16-Lead QSOP Package
θJA = 105°C/W, θJC = 39°C/W
tLOW
tR
tF
Model
ADM1031ARQ
ORDERING GUIDE
Temperature
Range
0°C to 100°C
Package
Package
Description Option
16-Lead QSOP RQ-16
tHD:STA
SCL
tHD:STA
SDA
tBUF
PS
tHD:DAT
tHIGH
tSU:DAT
tSU:STA
S
Figure 1. Diagram for Serial Bus Timing
tSU:STO
P
REV. 0
–3–


3Pages


ADM1031 電子部品, 半導体
ADM1031
7
VIN = 30mV p-p
6
5
4
3
2
1
0 VIN = 20mV p-p
1
0
100k 1M 100M 200M 300M 400M 500M
FREQUENCY Hz
TPC 7. Temperature Error vs. Differential-Mode Noise
Frequency
200
180
160
140
120
100
80
60
40
20
0
20
0
ADD = Hi-Z
ADD = GND
ADD = VCC
1.1 1.3 1.5 1.7 1.9 2.1 2.5 2.9 4.5
SUPPLY VOLTAGE V
TPC 8. Standby Supply Current vs. Supply Voltage
0.08
0
0.08
0.16
0.24
0.32
0.40
0.48
0.56
0.64
0.72
0.80
0
20 40 60
80 85 100 105 120
TEMPERATURE ؇C
TPC 9. Local Sensor Temperature Error
0.08
0
0.08
0.16
0.24
0.32
0.40
0.48
0.56
0.64
0.72
0.80
0
20 40 60
80 85 100 105 120
TEMPERATURE ؇C
TPC 10. Remote Temperature Sensor Error
1.30
1.25
1.20
1.15
1.10
1.05
1.00
0.95
0.90
0.85
0.80
2.0 2.2 2.4 2.6 2.8 3.0 3.2 3.4 3.6 3.8 4.0 4.2 4.4 4.6 4.8 5.0
SUPPLY VOLTAGE V
TPC 11. Supply Current vs. Supply Voltage
120
110
100
90
80
70
60
50
40
30
20
10
0
012 34 5 6 7 89
TIME Sec
TPC 12. Response to Thermal Shock
10
–6– REV. 0

6 Page



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共有リンク

Link :


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