ADM1026
Complete Thermal System
Management Controller
The ADM1026 is a complete system hardware monitor for
microprocessor−based systems, providing measurement and limit
comparison of various system parameters. The ADM1026 has up to 19
analog measurement channels. Fifteen analog voltage inputs are
provided, five of which are dedicated to monitoring +3.3 V, +5.0 V,
and
±12
V power supplies, and the processor core voltage. The
ADM1026 can monitor two other power supply voltages by
measuring its own V
CC
and the main system supply. One input (two
pins) is dedicated to a remote temperature−sensing diode. Two
additional pins can be configured as general−purpose analog inputs to
measure 0 V to 2.5 V, or as a second temperature sensing input. The
eight remaining inputs are general−purpose analog inputs with a range
of 0 V to 2.5 V or 0 V to 3.0 V. The ADM1026 also has an on−chip
temperature sensor.
The ADM1026 has eight pins that can be configured for fan speed
measurement or as general−purpose logic I/O pins. Another eight pins are
dedicated to general−purpose logic I/O. An additional pin can be
configured as a general−purpose I/O or as the bidirectional THERM pin.
Measured values can be read out via a 2−wire serial system
management bus, and values for limit comparisons can be
programmed 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.
FEATURES
http://onsemi.com
LQFP−48
CASE 932
MARKING DIAGRAM
ADM1026
JSTx
#YYWW
1
x
= Refer to list of PNs in
Ordering Info Table
#
= Pb−Free Package
YYWW = Date Code
•
Up to 19 Analog Measurement Channels
•
•
•
•
•
•
•
•
•
•
•
•
•
•
(Including Internal Measurements)
Up to 8 Fan Speed Measurement Channels
Up to 17 General−Purpose Logic I/O Pins
Remote Temperature Measurement with Remote Diode (Two Channels)
On−Chip Temperature Sensor
Analog and PWM Fan Speed Control Outputs
2−Wire Serial System Management Bus (SMBus)
8 kB On−Chip EEPROM
Full SMBus 1.1 Support Includes Packet Error Checking (PEC)
Chassis Intrusion Detection
Interrupt Output (SMBAlert)
Reset Input, Reset Outputs
Thermal Interrupt (THERM) Output
Limit Comparison of All Monitored Values
Pb−Free Packages are Available
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 54 of this data sheet.
APPLICATIONS
•
Network Servers and Personal Computers
•
Telecommunications Equipment
•
Test Equipment and Measuring Instruments
©
Semiconductor Components Industries, LLC, 2010
June, 2010
−
Rev. 3
1
Publication Order Number:
ADM1026/D
ONSEMI [ ON SEMICONDUCTOR ]
