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
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measuring its own V and the main system supply. One input (two
CC
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.
LQFP−48
CASE 932
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.
MARKING DIAGRAM
ADM1026
JSTx
#YYWW
1
FEATURES
x
= Refer to list of PNs in
Ordering Info Table
= Pb−Free Package
• Up to 19 Analog Measurement Channels
(Including Internal Measurements)
• Up to 8 Fan Speed Measurement Channels
#
YYWW = Date Code
• 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
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 54 of this data sheet.
• Thermal Interrupt (THERM) Output
• Limit Comparison of All Monitored Values
• Pb−Free Packages are Available
APPLICATIONS
• Network Servers and Personal Computers
• Telecommunications Equipment
• Test Equipment and Measuring Instruments
© Semiconductor Components Industries, LLC, 2010
1
Publication Order Number:
June, 2010 − Rev. 3
ADM1026/D