ADT7467ARQZ

Overview

The ADT7467ARQZ is a dbCOOL remote thermal monitor and fan controller designed for noise-sensitive or power-sensitive applications. It features three PWM outputs to control up to four fans, supporting both high and low frequency drive signals. The device monitors temperature using one on-chip sensor and two remote diode sensors, with an extended measurement range up to 191°C. It includes series resistance cancellation on remote channels and dynamic TMIN control mode to optimize system acoustics. Communication is handled via a fixed SMBus address of 0x2E.

Feature Summary

• Controls and monitors up to four fans with automatic speed control loops
• Features high and low frequency fan drive signal options
• Includes one on-chip and two remote temperature sensors with series resistance cancellation
• Provides thermal protection via bidirectional THERM output

Applications

• Noise-sensitive computer systems requiring active cooling
• Power-sensitive applications optimizing fan speed for minimum acoustic noise
• Systems monitoring Intel Pentium 4 processor performance impact
• Thermal management in environments requiring intelligent acoustics optimization

Procurement Notes

Verify the specific ordering suffix ARQZ corresponds to the QSOP-16 package and Pb-Free/RoHS compliance status as documented in the manufacturer's official datasheet. Confirm that the fixed SMBus address 0x2E aligns with your system bus configuration requirements before integration.

Selection Notes

Select this component when multiple fan control and precise thermal monitoring are required in a single IC. It is suitable for designs needing series resistance cancellation for accurate remote sensing and dynamic TMIN control for acoustic optimization. Ensure the system supports SMBus communication at the fixed address 0x2E.

Part Context

The ADT7467 is part of onsemi's dbCOOL family of thermal controllers. It serves as an upgrade to the ADT7460, offering enhanced features such as programmable high/low frequency drives, extended temperature range, and series resistance cancellation. It maintains pin and register map compatibility with previous generations while adding advanced acoustic and thermal management capabilities.

Replacement Considerations

The ADT7460 is a compatible predecessor with similar functionality but lacks high-frequency drive support and series resistance cancellation. Verify register map differences and default fan states during replacement to ensure proper system initialization.