Semiconductor Components Industries, LLC, 2012
April, 2012 Rev. 4
1
Publication Order Number:
ADM1024/D
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
fourth power supply voltage by measuring its own VCC. One input
(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.
Features
Up to Nine Measurement Channels
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*
Applications
Network Servers and Personal Computers
Microprocessor-Based Office Equipment
Test Equipment and Measuring Instruments
*For additional information on our PbFree 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
xxx
= Specific Device Code
#
= Pb-Free Package
YYWW = Date Code
MARKING DIAGRAM
TSSOP24
CASE 948H
1024
ARUZ
#YYWW
1
PIN ASSIGNMENT
AD1024
(Top View)
VID0/IRQ0
VID1/IRQ1
VID2/IRQ2
VID3/IRQ3
VID4/IRQ4
+VCCP1
+2.5VIN/D2+
VCCP2/D2
+5.0VIN
+12VIN
D1+
D1
NTEST_OUT/ADD
THERM
SDA
SCL
FAN1/AIN1
FAN2/AIN2
CI
GND
VCC
INT
NTEST_IN/AOUT
RESET
24
1
23
2
22
3
21
4
20
5
19
6
18
7
17
8
16
9
15
10
14
11
13
12