ADM1033ARQ-REEL

Overview

The ADM1033ARQ-REEL is a thermal monitor and fan speed controller manufactured by onsemi. It integrates one local and one remote temperature channel with ±1°C accuracy for both sensors. The device supports SMBus 2.0, 1.1, and 1.0 protocols and includes programmable over/undertemperature limits. It features a fail-safe overtemperature comparator output, FAN_FAULT indication, and THERM input for PROCHOT assertions. Supply voltage ranges from 3.0 V to 5.5 V in a 16-lead QSOP package.

Feature Summary

• Integrates local and remote temperature sensing channels with high accuracy
• Provides fan speed control with look-up table options for temperature-to-fan speed mapping
• Supports multiple SMBus protocol versions including 2.0, 1.1, and 1.0
• Includes fail-safe overtemperature protection and fault queue programming

Applications

• Desktop and notebook PCs
• Embedded systems
• Telecommunications equipment
• LCD projectors

Procurement Notes

Verify the specific manufacturer source as this component may be produced under license or acquisition agreements involving Analog Devices. Confirm RoHS compliance status and lead times through authorized distributors. Ensure the QSOP-16 package matches your PCB footprint requirements. Check for any recent product change notices regarding pinout or electrical characteristics before finalizing procurement.

Selection Notes

Select this component when precise dual-channel temperature monitoring is required alongside active fan control. The ±1°C accuracy on both local and remote channels makes it suitable for critical thermal management. Consider the SMBus compatibility with your system controller. The inclusion of a THERM input allows direct integration with processor hot signals for immediate throttling responses.

Part Context

This part belongs to the ADM103x series of thermal monitors and fan controllers designed for PC and server applications. It serves as a dedicated hardware solution for managing system temperatures and cooling fans without continuous CPU intervention. The QSOP-16 package offers a compact form factor for space-constrained designs.

Replacement Considerations

Check for ADM1033ARQZ-REEL as a potential variant with different packaging or tape-and-reel specifications. Verify cross-compatibility with other ADM103x family members if pinouts differ.