|ADM1022ARQ-REEL7(2003)||Low-Cost PC Temperature Monitor and Fan Control ASIC|
|ADM1022ARQ-REEL7 Datasheet PDF : 21 Pages |
Low-Cost PC Temperature
Monitor and Fan Control ASIC
External Temperature Measurement with Remote
Diode (Two Channels)
On-Chip Temperature Sensor
Interrupt and Over-Temperature Outputs
Fault Tolerant Fan Control
System Management Bus (SMBus)
Standby Mode to Minimize Power Consumption
Limit Comparison of all Monitored Values
Network Servers and Personal Computers
Microprocessor-Based Ofﬁce Equipment
Test Equipment and Measuring Instruments
The ADM1022 is a low cost temperature monitor and fan con-
troller for microprocessor-based systems. The temperature of one
or two remote sensor diodes may be measured, allowing monitor-
ing of processor temperature in single- or dual-processor systems.
Measured values can be read out via a serial System Manage-
ment Bus, and values for limit comparisons can be programmed
in over the same serial bus.
The ADM1022 also contains a DAC for fan speed control.
Automatic hardware temperature trip points are provided and
the fan will be driven to full speed if they are exceeded.
Finally, the chip has two supply voltage monitors for brownout
The ADM1022’s 3.0 V to 5.5 V supply voltage range, low supply
current, and SMBus interface make it ideal for a wide range of
applications. These include hardware monitoring and protection
applications in personal computers, electronic test equipment
and ofﬁce electronics.
FUNCTIONAL BLOCK DIAGRAM
AND 8-BIT DAC
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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.
Fax: 781/326-8703 © 2003 Analog Devices, Inc. All rights reserved.
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