ADM1022ARQ-REEL

Overview

The ADM1022ARQ-REEL is a microprocessor system temperature monitor manufactured by Analog Devices Inc. It functions as a two-channel digital thermometer and undertemperature/overtemperature alarm designed for personal computers and thermal management systems. The device measures the temperature of a microprocessor using a diode-connected PNP transistor, which may be provided on-chip or as a discrete component, and monitors its own environment via an on-chip sensor. It communicates over a two-wire serial interface compatible with SMBus standards. The unit operates within a supply voltage range of 3 V to 5.5 V and utilizes a small 16-lead QSOP package.

Feature Summary

• On-chip and remote temperature sensing capabilities without calibration requirements
• SMBus serial interface supporting system management bus alert signals
• Programmable overtemperature and undertemperature limits

Applications

• Desktop computers
• Notebook computers
• Smart batteries
• Industrial controllers
• Telecom equipment

Procurement Notes

Verify the specific suffix against official documentation to confirm packaging configuration. Ensure compatibility with existing SMBbus protocols in the target design. Confirm RoHS compliance status through current manufacturer declarations before finalizing procurement orders.

Selection Notes

Select this component when low-cost thermal monitoring is required for microprocessor systems. It serves as an alternative to similar legacy models. Verify that the 16-lead QSOP package fits the board layout constraints. Ensure the operating temperature range meets the environmental specifications of the application.

Part Context

This part belongs to the ADM1021 family of temperature monitors. It shares functional similarities with the ADM1021A but offers distinct pinout or feature variations. The series is designed for cost-effective system design and monitoring of analog and digital sensors in consumer and industrial electronics.

Replacement Considerations

The ADM1021A is documented as a direct alternative. Verify pin compatibility and register mapping before substitution. Other family members may require schematic adjustments.