ADM1025ARQ

Overview

The ADM1025ARQ is a digital temperature sensor and thermal monitor manufactured by Analog Devices. It features an on-chip diode-connected PNP transistor for local temperature measurement and supports remote sensing via external diodes or transistors. The device provides programmable overtemperature and undertemperature limits with an ALERT output for system management. Communication is handled through a two-wire SMBus serial interface compatible with standard protocols. It operates within a supply voltage range of 3 V to 5.5 V, drawing a maximum operating current of 200 mA and a standby current of 1 mA. The component is housed in a small 16-lead QSOP package.

Feature Summary

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

Applications

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

Procurement Notes

Verify the specific suffix ARQ corresponds to the 16-lead QSOP package and industrial temperature grade when sourcing. Confirm RoHS compliance status as manufacturing processes may vary across production lots. Ensure the supplier provides valid documentation regarding the active status of this part number before finalizing procurement plans.

Selection Notes

Select the ADM1025ARQ for applications requiring precise thermal monitoring with minimal calibration overhead. The integrated SMBus interface simplifies integration into existing system management architectures. Consider the 16-lead QSOP package constraints for PCB layout planning. Verify that the required accuracy specifications align with the device's stated performance characteristics for both on-chip and remote sensors.

Part Context

This component belongs to the ADM1021 family of low-cost microprocessor system temperature monitors. It serves as a direct alternative to the ADM1021, offering similar functionality with enhanced packaging options. The series is designed for cost-sensitive applications requiring reliable thermal management in computing and industrial environments.

Replacement Considerations

The ADM1021AARQ is a documented functional alternative within the same product family. Verify pinout compatibility and software register mapping differences before substitution. Ensure the replacement part meets the same environmental and electrical specifications required by the original design.