ADM1024
System Hardware Monitor
with Remote Diode Thermal
Sensing
The ADM1024 is a complete system hardware monitor for
microprocessor−based systems, providing measurement and limit
comparison of various system parameters. Eight measurement inputs
are provided; three are dedicated to monitoring 5.0 V and 12 V power
supplies and the processor core voltage. The ADM1024 can monitor a
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fourth power supply voltage by measuring its own V . One input
CC
TSSOP−24
CASE 948H
(two pins) is dedicated to a remote temperature−sensing diode. Two
more pins can be configured as inputs to monitor a 2.5 V supply and a
second processor core voltage, or as a second temperature−sensing
input. The remaining two inputs can be programmed as general
purpose analog inputs or as digital fan speed measuring inputs.
Measured values can be read out via a serial System Management Bus
and values for limit comparisons can be programmed in over the same
serial bus. The high speed successive approximation ADC allows
frequent sampling of all analog channels to ensure a fast interrupt
response to any out−of−limit measurement.
MARKING DIAGRAM
1024
ARUZ
#YYWW
The ADM1024’s 2.8 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.
1
xxx
#
= Specific Device Code
= Pb−Free Package
YYWW = Date Code
FEATURES
• Up to Nine Measurement Channels
PIN ASSIGNMENT
• Inputs Programmable−to−Measure Analog Voltage,
Fan Speed or External Temperature
• External Temperature Measurement with Remote Diode
(Two Channels)
• On−Chip Temperature Sensor
• Five Digital Inputs for VID Bits
• LDCM Support
• System Management Bus (SMBus)
• Chassis Intrusion Detect
• Interrupt and Overtemperature Outputs
• Programmable RESET Input Pin
• Shutdown Mode to Minimize Power Consumption
• Limit Comparison of All Monitored Values
• This is a Pb−Free Device
1
2
24
23
22
21
VID0/IRQ0
VID1/IRQ1
NTEST_OUT/ADD
THERM
SDA
3
4
5
6
7
8
VID2/IRQ2
VID3/IRQ3
SCL
AD1024
(Top View)
20 VID4/IRQ4
FAN1/AIN1
FAN2/AIN2
CI
+V
19
18
17
16
CCP1
+2.5V /D2+
IN
V
/D2–
CCP2
GND
+5.0V
+12V
V
9
IN
CC
10
IN
INT
15
14
D1+
D1–
NTEST_IN/AOUT 11
12
13
RESET
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 28 of this data sheet.
APPLICATIONS
• Network Servers and Personal Computers
• Microprocessor−Based Office Equipment
• Test Equipment and Measuring Instruments
© Semiconductor Components Industries, LLC, 2010
1
Publication Order Number:
June, 2010 − Rev. 2
ADM1024/D