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ADM1025 View Datasheet(PDF) - Analog Devices

Part Name
Description
Manufacturer
ADM1025
ADI
Analog Devices ADI
ADM1025 Datasheet PDF : 16 Pages
1 2 3 4 5 6 7 8 9 10 Next Last
a
Low Cost PC
Hardware Monitor ASIC
ADM1025/ADM1025A*
FEATURES
Up to 8 Measurement Channels
5 Inputs to Measure Supply Voltages
VCC Monitored Internally
External Temperature Measurement with Remote Diode
On-Chip Temperature Sensor
5 Digital Inputs for VID Bits
Integrated 100 kPull-Ups on VID Pins (ADM1025 Only)
LDCM Support
I2C® Compatible System Management Bus (SMBus)
Programmable RST Output Pin
Programmable INT Output Pin
Configurable Offset for Internal/External Channel
Shutdown Mode to Minimize Power Consumption
Limit Comparison of all Monitored Values
APPLICATIONS
Network Servers and Personal Computers
Microprocessor-Based Office Equipment
Test Equipment and Measuring Instruments
PRODUCT DESCRIPTION
The ADM1025/ADM1025A is a complete system hardware
monitor for microprocessor-based systems, providing measure-
ment and limit comparison of various system parameters. Five
voltage measurement inputs are provided for monitoring 2.5 V,
3.3 V, 5 V, and 12 V power supplies and the processor core
voltage. The ADM1025/ADM1025A can monitor a sixth power
supply voltage by measuring its own VCC. One input (two pins) is
dedicated to a remote temperature-sensing diode, and an on-chip
temperature sensor allows ambient temperature to be moni-
tored. The ADM1025A has open-drain VID inputs while the
ADM1025 has on-chip 100 kpull-ups on the VID inputs.
Measured values and in/out of limit status can be read out via
an I2C compatible serial System Management Bus. The device
can be controlled and configured over the same serial bus. The
device also has a programmable INT output to indicate under-
voltage, overvoltage, and overtemperature conditions.
The ADM1025/ADM1025A’s 3.0 V to 5.5 V supply voltage
range, low supply current, and I2C compatible 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.
FUNCTIONAL BLOCK DIAGRAM
VID0
VID1
VID2
VID3
12VIN/VID4
VCC
VDD
VID0–VID3
REGISTER
100k
300kPULL-UPS
VID4
REGISTER
POWER TO CHIP
SERIAL BUS
INTERFACE
ADM1025/
ADM1025A
VALUE AND
LIMIT
REGISTERS
ADD/RST/INT/NTO
SDA
SCL
VCCPIN
2.5VIN
3.3VIN
5VIN
D+
D–/NTI
BAND GAP
TEMPERATURE
SENSOR
INPUT
ATTENUATORS
AND
ANALOG
MULTIPLEXER
ADDRESS
POINTER
REGISTER
ADC
2.5V
BAND GAP
REFERENCE
LIMIT
COMPARATORS
MEASUREMENT
STATUS
REGISTERS
OFFSET
REGISTER
CONFIGURATION
REGISTER
*Patent Pending.
GND
Purchase of licensed I2C components of Analog Devices or one of its sublicensed
Associated Companies conveys a license for the purchaser under the Philips I 2C Patent
Rights to use these components in an I2C system, provided that the system conforms
to the I2C Standard Specification as defined by Philips.
REV. C
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties that
may result from its use. No license is granted by implication or otherwise
under any patent or patent rights of Analog Devices. Trademarks and
registered trademarks are the property of their respective companies.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
www.analog.com
Fax: 781/326-8703 © 2003 Analog Devices, Inc. All rights reserved.
 

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