ADT7470ARQZ-REEL

Thermal Management Overview

The ADT7470ARQZ-REEL is a multichannel temperature sensor hub and PWM fan controller manufactured by Analog Devices. It monitors up to 10 remote temperature sensors via daisy-chained TMP05 sensors and controls the speed of four fans independently using software-controlled PWM outputs. The device features an SMBALERT interrupt for failure signaling, supports fast I2C (400 kHz max), and meets SMBus 2.0 electrical specifications. It operates within a supply voltage range of 3.0 V to 5.5 V and functions across a temperature range of -40°C to +125°C.

Thermal Management Feature Summary

• Monitors up to 10 remote temperature sensors and controls up to 4 fans independently
• Provides software-controlled PWM outputs with hardware MAX_SPEED capability
• Generates SMBALERT interrupts for system error conditions
• Supports fast I2C and SMBus 2.0 protocols with three-state address selection

Thermal Management Applications

• Servers
• Networking and telecommunications equipment
• Desktops

Thermal Management Procurement Notes

Verify the REEL suffix indicates tape-and-reel packaging rather than tube packaging when sourcing components. Confirm the specific revision level matches design requirements, as datasheet revisions may update timing or electrical parameters. Ensure the QSOP-16 package footprint aligns with PCB layout constraints before finalizing procurement orders.

Thermal Management Selection Notes

Select this component for systems requiring active cooling management with multiple thermal zones. It is suitable for applications needing independent fan control loops and centralized temperature monitoring via standard serial interfaces. Consider the open-drain output requirements and pull-up resistor needs for SDA, SCL, and PWM lines during circuit design.

Thermal Management Part Context

This part belongs to the ADT7470 series of thermal monitor and fan controllers. It is designed for board-mount installation in surface-mount technology (SMD/SMT) configurations. The device integrates digital temperature decoding and fan speed measurement capabilities into a single integrated circuit solution for system management.

Thermal Management Replacement Considerations

Check for ADT7470ARQZ if tube packaging is required instead of reel packaging. Verify compatibility with alternative fan controllers if pinout or register maps differ significantly in potential substitute parts.