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?Semiconductor Components Industries, LLC, 2012
April, 2012  Rev. 3
1
Publication Order Number:
ADM1030/D
ADM1030
Intelligent Temperature
Monitor and PWM Fan
Controller
The ADM1030 is an ACPI-compliant two-channel digital
thermometer and under/over temperature alarm, for use in computers
and thermal management systems. Optimized for the Pentium
?/DIV>
III,
the higher 1癈 accuracy offered allows systems designers to safely
reduce temperature guardbanding and increase system performance.
A Pulsewidth Modulated (PWM) Fan Control output controls the
speed of a cooling fan by varying output duty cycle. Duty cycle values
between 33%100% allow smooth control of the fan. The speed of the
fan can be monitored via a TACH input for a fan with a tach output.
The TACH input can be programmed as an analog input, allowing the
speed of a 2-wire fan to be determined via a sense resistor. 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, the fan can still be
controlled based on temperature measurements, and the fan speed
adjusted to correct any changes in system temperature. Fan Speed may
also be controlled using existing ACPI software. One input (two pins)
is dedicated to a remote temperaturesensing diode with an accuracy of
?癈, and a local 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 over-temperature
conditions that can be used to throttle a CPU clock.
Features
?SPAN class="pst ADM1030ARQZ-RL7_2617276_4"> Optimized for Pentium
?/DIV>
III: Allows Reduced Guardbanding
Software and Automatic Fan Speed Control
?SPAN class="pst ADM1030ARQZ-RL7_2617276_4"> Automatic Fan Speed Control Allows Control Independent of CPU
Intervention after Initial Setup
?SPAN class="pst ADM1030ARQZ-RL7_2617276_4"> Control Loop Minimizes Acoustic Noise and Battery Consumption
?SPAN class="pst ADM1030ARQZ-RL7_2617276_4"> Remote Temperature Measurement Accurate to 1?/SPAN>C Using Remote
Diode
?SPAN class="pst ADM1030ARQZ-RL7_2617276_4"> 0.125?/SPAN>C Resolution on Remote Temperature Channel
?SPAN class="pst ADM1030ARQZ-RL7_2617276_4"> Local Temperature Sensor with 0.25?/SPAN>C Resolution
?SPAN class="pst ADM1030ARQZ-RL7_2617276_4"> Pulsewidth Modulation Fan Control (PWM)
?SPAN class="pst ADM1030ARQZ-RL7_2617276_4"> Programmable PWM Frequency
?SPAN class="pst ADM1030ARQZ-RL7_2617276_4"> Programmable PWM Duty Cycle
?SPAN class="pst ADM1030ARQZ-RL7_2617276_4"> Tach Fan Speed Measurement
?SPAN class="pst ADM1030ARQZ-RL7_2617276_4"> Analog Input To Measure Fan Speed of 2-wire Fans
(Using Sense Resistor)
?SPAN class="pst ADM1030ARQZ-RL7_2617276_4"> 2-wire System Management Bus (SMBus) with ARA Support
?SPAN class="pst ADM1030ARQZ-RL7_2617276_4"> Overtemperature THERM
 Output Pin
?SPAN class="pst ADM1030ARQZ-RL7_2617276_4"> Programmable INT
 Output Pin
?SPAN class="pst ADM1030ARQZ-RL7_2617276_4"> Configurable Offset for All Temperature Channels
?SPAN class="pst ADM1030ARQZ-RL7_2617276_4"> 3 V to 5.5 V Supply Range
?SPAN class="pst ADM1030ARQZ-RL7_2617276_4"> Shutdown Mode to Minimize Power Consumption
?SPAN class="pst ADM1030ARQZ-RL7_2617276_4"> This is a Pb-Free Device*
Applications
?SPAN class="pst ADM1030ARQZ-RL7_2617276_4"> Notebook PCs, Network Servers and Personal
Computers
?SPAN class="pst ADM1030ARQZ-RL7_2617276_4"> Telecommunications Equipment
* For additional information on our Pb-Free strategy and soldering details, please download the ON Semiconductor Soldering and Mounting
Techniques Reference Manual, SOLDERRM/D.
http://onsemi.com
See detailed ordering and shipping information in the package
dimensions section on page 29 of this data sheet.
ORDERING INFORMATION
1029ARQZ
= Special Device Code
#
= Pb-Free Package
YY
= Year
WW
= Work Week
MARKING DIAGRAM
QSOP16
CASE 492
ADM1030
Top View
(Not To Scale)
SCL
SDA
INT
NC
ADD
NC
D+
D
PWM_OUT
TACH/AIN
NC
NC
GND
V
CC
THERM
FAN_FAULT
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
PIN ASSIGNMENT
NC = No Connect
1030A
RQZ
#YYWW
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