ADM1025ARQ-REEL

Overview

The ADM1025ARQ-REEL is a digital thermal controller and voltage monitor manufactured by Analog Devices Inc. It operates within a supply voltage range of 3V to 5.5V and utilizes a 16-pin QSOP package. The device integrates one on-chip temperature sensor with ±1°C accuracy and two remote diode sensors with ±0.5°C accuracy, covering a monitoring range of 0°C to +100°C. It features dual PWM fan control outputs with programmable frequency and duty cycle, supporting automatic speed regulation based on measured temperatures. Communication is handled via a 2-wire SMBus interface compliant with SMBus 2.0 specifications.

Feature Summary

• Integrates local and remote temperature sensing for precise thermal management
• Provides dual PWM fan control with automatic speed adjustment capabilities
• Supports system voltage monitoring for critical power rails
• Enables low-noise operation through enhanced acoustic mode algorithms

Applications

• Low acoustic noise personal computers
• Networking equipment requiring active cooling
• Telecommunications systems

Procurement Notes

Verify the specific suffix REEL7 or standard reel packaging against current distributor listings, as availability may vary. Confirm RoHS compliance status directly with the manufacturer or authorized agents. Ensure the QSOP-16 footprint matches the target PCB design. Check for obsolescence notices or lifecycle status updates prior to finalizing procurement plans.

Selection Notes

Select this component when simultaneous monitoring of multiple supply voltages and precise thermal control are required. It is suitable for designs prioritizing acoustic performance in sensitive environments. Compare pin compatibility with successor models like the ADT7466 if future-proofing is necessary. Ensure the SMBus interface aligns with the host microcontroller's communication protocols.

Part Context

This part belongs to the ADM1025 family of dBCOOL controllers designed for noise-sensitive applications. It serves as a complete system monitor solution, combining thermal sensing with fan control. The device is positioned for use in PC and server architectures where thermal efficiency and user comfort are critical design parameters.

Replacement Considerations

The ADT7466 is a documented successor in the dBCOOL family offering similar functionality. Verify pinout compatibility before substitution. Other alternatives include the ADM1027ARQ-REEL for expanded voltage monitoring channels.