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参数资料
| 型号： | ADM1022 |
| 厂商： | Analog Devices, Inc. |
| 英文描述： | Low-Cost PC Temperature Monitor and Fan Control ASIC |
| 中文描述： | 低价电脑温度监控和风扇控制ASIC |
| 文件页数： | 1/19页 |
| 文件大小： | 190K |
| 代理商： | ADM1022 |
REV. 0
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.
a
ADM1022
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
World Wide Web Site: http://www.analog.com
Fax: 781/326-8703
Analog Devices, Inc., 2000
Low-Cost PC Temperature
Monitor and Fan Control ASIC
FUNCTIONAL BLOCK DIAGRAM
2.5V
BANDGAP
REFERENCE
ADDRESS
POINTER
REGISTER
ADC
RESET
GENERATOR 1
ANALOG
MULTIPLEXER
ADM1022
RST1
RST2
D1+
D1–
D2+/GPI
D2–/
THERM
GND
SDA
SCL
ADD/NTEST_OUT
MR
V
CC
20k
V
CC
V
MON
FAN_SPD/NTEST_IN
INT
FAN_OFF
LIMIT
COMPARATORS
INTERRUPT
STATUS
REGISTERS
MASK
GATING
CONFIGURATION
REGISTER
SERIAL BUS
INTERFACE
INT MASK
REGISTER
ANALOG
OUTPUT
REGISTER
AND 8-BIT DAC
VALUE AND
LIMIT
REGISTERS
RESET
GENERATOR 2
BANDGAP
TEMPERATURE
SENSOR
FEATURES
External Temperature Measurement with Remote
Diode (Two Channels)
On-Chip Temperature Sensor
Interrupt and Over-Temperature Outputs
Fault Tolerant Fan Control
Brownout Detection
LDCM Support
System Management Bus (SMBus)
Standby Mode to Minimize Power Consumption
Limit Comparison of all Monitored Values
APPLICATIONS
Network Servers and Personal Computers
Microprocessor-Based Office Equipment
Test Equipment and Measuring Instruments
GENERAL DESCRIPTION
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
monitoring of processor temperature in single- or dual-pro-
cessor 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
detection.
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.
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