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
(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.
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.
TSSOP−24
CASE 948H
PIN ASSIGNMENT
NTEST_OUT/ADD
THERM
SDA
1
2
24
23
22
21
20
19
18
17
16
15
14
13
VID0/IRQ0
VID1/IRQ1
VID2/IRQ2
VID3/IRQ3
VID4/IRQ4
3
SCL
4
FAN1/AIN1
FAN2/AIN2
CI
5
6
+V
CCP1
7
+2.5V /D2+
IN
8
GND
V
CCP2
/D2−
V
CC
9
+5.0V
IN
Features
10
11
12
INT
NTEST_IN/AOUT
RESET
+12V
D1+
D1−
IN
Up to Nine Measurement Channels
Inputs Programmable-to-Measure Analog Voltage,
Fan Speed or External Temperature
External Temperature Measurement with Remote Diode
(Two Channels)
AD1024
(Top View)
On-chip Temperature Sensor
Five Digital Inputs for VID Bits
MARKING DIAGRAM
LDCM Support
System Management Bus (SMBus)
Chassis Intrusion Detect
1024
ARUZ
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*
#YYWW
1
xxx
#
= Specific Device Code
= Pb-Free Package
YYWW = Date Code
Applications
ORDERING INFORMATION
Network Servers and Personal Computers
Microprocessor-Based Office Equipment
Test Equipment and Measuring Instruments
See detailed ordering and shipping information in the package
dimensions section on page 29 of this data sheet.
*For additional information on our Pb−Free strategy and soldering details, please
download the ON Semiconductor Soldering and Mounting Techniques
Reference Manual, SOLDERRM/D.
Semiconductor Components Industries, LLC, 2012
1
Publication Order Number:
April, 2012 − Rev. 4
ADM1024/D