ADM1022ARQ

Overview

The ADM1022ARQ is a microprocessor system temperature monitor manufactured by Analog Devices Inc. It features two-channel digital thermometry with on-chip and remote sensing capabilities, eliminating the need for external calibration. The device utilizes a 2-wire SMBus serial interface for communication and supports system management bus alert functions. It operates within a supply voltage range of 3V to 5.5V and is housed in a small 16-lead QSOP package. Key electrical parameters include 1°C accuracy for the on-chip sensor and 3°C accuracy for the remote sensor, with programmable overtemperature and undertemperature limits.

Feature Summary

• On-chip and remote temperature sensing without calibration requirements
• Programmable overtemperature and undertemperature alarm limits
• SMBus compatible 2-wire serial interface support

Applications

• Desktop computer thermal monitoring
• Notebook computer system management
• Industrial controller temperature regulation

Procurement Notes

Verify the specific manufacturer part number against official Analog Devices documentation to ensure authenticity. Confirm that the component matches the required 16-lead QSOP package format. Check for any obsolescence notices or lifecycle status updates directly from the manufacturer before procurement planning.

Selection Notes

Select this component when precise thermal monitoring of microprocessors and environmental temperatures is required without calibration overhead. Ensure the design supports the 2-wire SMBus protocol and accommodates the specified supply voltage range. Verify that the remote sensor interface aligns with the intended discrete NPN/PNP transistor configuration.

Part Context

The ADM1022ARQ belongs to the ADM1021 family of low-cost microprocessor system temperature monitors. It serves as an alternative to previous generation sensors, offering enhanced integration for thermal management in computing and industrial systems. The device is designed to replace discrete thermal protection circuits with a single integrated solution.

Replacement Considerations

The ADM1021AARQ is documented as a direct alternative within the same product family. Verify pinout compatibility and software register mapping between the ADM1022ARQ and potential substitute parts before implementation.