ADM1025ARQ-REEL

ADM1025ARQ-REEL Datasheet

ADM1025/ADM1025A*

Part	Datasheet
ADM1025ARQ-REEL	ADM1025ARQ-REEL (pdf)

Related Parts	Information
ADM1025ARQ-REEL7	ADM1025ARQ-REEL7

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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 Pull-Ups on VID Pins ADM1025 Only LDCM Support Compatible System Management Bus SMBus Programmable RST Output Pin Programmable INT Output Pin 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 Equipment Test Equipment and Measuring Instruments PRODUCT DESCRIPTION The ADM1025/ADM1025A is a complete system hardware monitor for microprocessor-based systems, providing measurement and limit comparison of various system parameters. Five voltage measurement inputs are provided for monitoring V, 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 monitored. The ADM1025A has open-drain VID inputs while the ADM1025 has on-chip 100 pull-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 over the same serial bus. The device also has a programmable INT output to indicate undervoltage, overvoltage, and overtemperature conditions. The ADM1025/ADM1025A’s V to 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 electronics. FUNCTIONAL BLOCK DIAGRAM VID0 VID1 VID2 VID3 12VIN/VID4 VCC REGISTER PULL-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+ BAND GAP TEMPERATURE SENSOR INPUT ATTENUATORS AND ANALOG MULTIPLEXER ADDRESS POINTER REGISTER 2.5V BAND GAP REFERENCE LIMIT COMPARATORS MEASUREMENT STATUS REGISTERS OFFSET REGISTER CONFIGURATION REGISTER *Patent Pending. 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. 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 Fax 781/326-8703 2003 Analog Devices, Inc. All rights reserved. ORDERING GUIDE Package Description 16-Lead QSOP 16-Lead QSOP Package Option RQ-16 RQ-16 Option Integrated 100 VID Pull-Ups Open-Drain VID Inputs tLOW tHD:STA tHD:STA tBUF tHD:DAT tHIGH tSU:DAT tSU:STA Figure Diagram for Serial Bus Timing tSU:STO ADM1025/ADM1025A Pin No. Mnemonic 1 SDA 2 SCL 3 GND 4 VCC 5 VID0 6 VID1 7 VID2 8 VID3 10 D+ 11 12VIN/VID4 12 5VIN 13 3.3VIN 14 2.5VIN 15 VCCPIN 16 ADD/RST/INT/NTO PIN FUNCTION DESCRIPTIONS Digital I/O. Serial bus bidirectional data. Open-drain output. Digital Input. Serial bus clock. System Ground Power. Can be powered by V standby power if monitoring in low power states is required. This pin also serves as the analog input to monitor VCC. Digital Input. Core voltage ID readouts from the processor. This value is read into the Status Register. It has an on-chip 100 pull-up resistor ADM1025 only . Digital Input. Core voltage ID readouts from the processor. This value is read into the Status Register. It has an on-chip 100 pull-up resistor ADM1025 only . Digital Input. Core voltage ID readouts from the processor. This value is read into the Status Register. It has an on-chip 100 pull-up resistor ADM1025 only . Digital Input. Core voltage ID readouts from the processor. This value is read into the Status Register. It has an on-chip 100 pull-up resistor ADM1025 only . Analog/Digital Input. Connected to cathode of external temperature sensing diode. If held high at power-up, it initiates NAND tree test mode. Analog Input. Connected to anode of external temperature sensing diode. Programmable Analog/Digital Input. Defaults to 12 VIN analog input at power-up but may be programmed as VID4 Core Voltage ID readout from the processor. This value is read into the VID4 Status Register. In analog 12 VIN mode, it has an on-chip voltage attenuator. In VID4 mode, it has an on-chip 300 pull-up resistor. Analog Input. Monitors 5 V supply. Analog Input. Monitors V supply. Analog Input. Monitors V supply. Analog Input. Monitors processor core voltage 0 V to V . Programmable Digital I/O. The lowest order programmable bit of the SMBus Address, sampled on SMB activity as a three-state input. Can also be to give a minimum 20 ms low reset output pulse. Alternatively, it can be programmed as an interrupt output for temperature/voltage interrupts. Functions as the output of the NAND tree in NAND tree test mode. PIN CONFIGURATION SDA 1 16 ADD/RST/INT/NTO SCL 2 15 VCCPIN GND 3 ADM1025/ 14 2.5VIN VCC 4 ADM1025A 13 3.3VIN VID0 TOP VIEW Not to Scale 12 5VIN VID1 6 11 12VIN/VID4 VID2 7

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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 Pull-Ups on VID Pins ADM1025 Only LDCM Support Compatible System Management Bus SMBus Programmable RST Output Pin Programmable INT Output Pin 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 Equipment Test Equipment and Measuring Instruments

PRODUCT DESCRIPTION The ADM1025/ADM1025A is a complete system hardware monitor for microprocessor-based systems, providing measurement and limit comparison of various system parameters. Five voltage measurement inputs are provided for monitoring V, 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 monitored. The ADM1025A has open-drain VID inputs while the ADM1025 has on-chip 100 pull-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 over the same serial bus. The device also has a programmable INT output to indicate undervoltage, overvoltage, and overtemperature conditions.

The ADM1025/ADM1025A’s V to 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 electronics.

FUNCTIONAL BLOCK DIAGRAM

VID0 VID1 VID2 VID3
12VIN/VID4 VCC

REGISTER

PULL-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+

BAND GAP TEMPERATURE

SENSOR

INPUT ATTENUATORS

AND ANALOG MULTIPLEXER

ADDRESS POINTER REGISTER
2.5V BAND GAP REFERENCE

LIMIT COMPARATORS

MEASUREMENT STATUS

REGISTERS

OFFSET REGISTER

CONFIGURATION REGISTER
*Patent Pending.

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.

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

Fax 781/326-8703 2003 Analog Devices, Inc. All rights reserved.
ORDERING GUIDE

Package Description
16-Lead QSOP 16-Lead QSOP

Package Option

RQ-16 RQ-16

Option

Integrated 100 VID Pull-Ups Open-Drain VID Inputs
tLOW
tHD:STA
tHD:STA
tBUF
tHD:DAT
tHIGH
tSU:DAT
tSU:STA

Figure Diagram for Serial Bus Timing
tSU:STO

ADM1025/ADM1025A

Pin No. Mnemonic
1 SDA 2 SCL 3 GND 4 VCC
5 VID0
6 VID1
7 VID2
8 VID3
10 D+ 11 12VIN/VID4
12 5VIN 13 3.3VIN 14 2.5VIN 15 VCCPIN 16 ADD/RST/INT/NTO

PIN FUNCTION DESCRIPTIONS

Digital I/O. Serial bus bidirectional data. Open-drain output. Digital Input. Serial bus clock. System Ground Power. Can be powered by V standby power if monitoring in low power states is required. This pin also serves as the analog input to monitor VCC. Digital Input. Core voltage ID readouts from the processor. This value is read into the Status Register. It has an on-chip 100 pull-up resistor ADM1025 only . Digital Input. Core voltage ID readouts from the processor. This value is read into the Status Register. It has an on-chip 100 pull-up resistor ADM1025 only . Digital Input. Core voltage ID readouts from the processor. This value is read into the Status Register. It has an on-chip 100 pull-up resistor ADM1025 only . Digital Input. Core voltage ID readouts from the processor. This value is read into the Status Register. It has an on-chip 100 pull-up resistor ADM1025 only . Analog/Digital Input. Connected to cathode of external temperature sensing diode. If held high at power-up, it initiates NAND tree test mode. Analog Input. Connected to anode of external temperature sensing diode. Programmable Analog/Digital Input. Defaults to 12 VIN analog input at power-up but may be programmed as VID4 Core Voltage ID readout from the processor. This value is read into the VID4 Status Register. In analog 12 VIN mode, it has an on-chip voltage attenuator. In VID4 mode, it has an on-chip 300 pull-up resistor. Analog Input. Monitors 5 V supply. Analog Input. Monitors V supply. Analog Input. Monitors V supply. Analog Input. Monitors processor core voltage 0 V to V . Programmable Digital I/O. The lowest order programmable bit of the SMBus Address, sampled on SMB activity as a three-state input. Can also be to give a minimum 20 ms low reset output pulse. Alternatively, it can be programmed as an interrupt output for temperature/voltage interrupts. Functions as the output of the NAND tree in NAND tree test mode.

PIN CONFIGURATION

SDA 1
16 ADD/RST/INT/NTO

SCL 2
15 VCCPIN

GND 3 ADM1025/ 14 2.5VIN

VCC 4 ADM1025A 13 3.3VIN

VID0

TOP VIEW Not to Scale 12
5VIN

VID1 6
11 12VIN/VID4

VID2 7

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Datasheet ID: ADM1025ARQ-REEL 517828