ADT7460ARQ-REEL

Overview

The ADT7460ARQ-REEL is a dBCOOL remote thermal controller and fan controller designed for noise-sensitive applications. It monitors up to two remote diode sensors plus an internal temperature sensor, with local accuracy of ±1.5°C at 25°C. The device controls up to four fans via three PWM outputs and measures speed using TACH inputs. It supports SMBus 2.0 communication, features dynamic TMIN control for acoustic optimization, and includes a bidirectional THERM pin for thermal protection and performance monitoring.

Feature Summary

• Intelligent dynamic TMIN control mode optimizes system acoustics by managing thermal thresholds based on measured temperatures.
• Automatic fan speed control loop adjusts cooling levels according to real-time temperature data from one on-chip and two remote sensors.
• Bidirectional THERM pin enables both monitoring of processor thermal signals and outputting overtemperature alerts for system protection.

Applications

• Low acoustic noise PCs
• Networking equipment
• Telecommunications equipment

Procurement Notes

Verify the manufacturer origin, as Analog Devices specifications apply despite onsemi distribution listings. Confirm the package type matches the QSOP-16 outline dimensions in the official datasheet. Ensure the reel packaging aligns with the REEL suffix designation. Cross-reference the specific revision level against the latest documentation to confirm parameter stability.

Selection Notes

Select this component for systems requiring precise thermal management with minimal acoustic impact. It is suitable where SMBus integration is required for centralized monitoring. The device supports both 3.3 V and 5 V supply rails, offering flexibility in power architecture design for various server and workstation platforms.

Part Context

Originally developed by Analog Devices, the ADT7460 is part of the dBCOOL family of thermal controllers. The ADT7460ARQ-REEL variant specifically denotes the QSOP-16 package configuration supplied in reel format. This component serves as a bridge between thermal sensing and active cooling control in modern electronic systems.

Replacement Considerations

Check for ADT7460 variants with different package codes or suffixes if physical footprint constraints change. Verify SMBus address configurations when substituting multiple units in a single bus topology.

FAQ

How does the ADT7460 handle fan speed measurement?

It measures fan speed via dedicated TACH inputs, supporting both 2-wire and 3-wire fan tachometer signals through digital input pins.

What is the function of the THERM pin?

The THERM pin is bidirectional; it can monitor external thermal signals like Intel PROCHOT or act as an output to signal overtemperature conditions.