ADT7476AARQZ

Overview

The ADT7476AARQZ is a thermal monitor and multiple PWM fan controller designed for noise-sensitive or power-sensitive applications requiring active system cooling. It monitors up to five voltages, controls and monitors up to four fans, and measures temperatures using one on-chip sensor and two remote diodes. The device supports high and low frequency drive signals, automatic fan speed control based on measured temperature, and enhanced acoustic mode to reduce user perception of changing speeds. It features thermal protection via the THERM output and meets SMBus 2.0 electrical specifications.

Feature Summary

• Monitors up to five voltages including +5V, +12V, VCCP, and two VID/GPIO channels
• Controls and monitors up to four fans with high and low frequency drive signals
• Measures temperature using one internal sensor and two remote diode sensors
• Provides automatic fan speed control and enhanced acoustic mode

Applications

• Thermal monitoring in systems requiring active cooling
• Fan speed control for noise-sensitive applications
• Power management in systems with critical thermal protection needs
• Monitoring performance impact of Intel Pentium 4 processors

Procurement Notes

Verify the specific ordering suffix ARQZ corresponds to the QSOP-24 package and Pb-Free compliance as documented in the manufacturer's datasheet. Confirm that the device meets RoHS standards and check for any specific handling requirements related to ESD sensitivity during installation and storage.

Selection Notes

Select this component when designing systems that require precise thermal monitoring and multi-fan control via SMBus. Ensure compatibility with the required voltage levels (+5V, +12V, VCCP) and verify that the SMBus address configuration options meet the system's addressing requirements. Consider the extended temperature measurement range and accuracy specifications for the intended operating environment.

Part Context

The ADT7476A is part of onsemi's thermal management product line, specifically designed for motherboard and system-level thermal control. It integrates multiple sensing and control functions into a single IC, reducing the component count and complexity of thermal management designs compared to discrete solutions.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.