ADT7470ARQZ

Overview

The ADT7470ARQZ is a multichannel temperature sensor hub and PWM fan controller designed for systems requiring active cooling. It monitors up to 10 remote TMP05 sensors and controls four fans independently via software or automatic loops. The device operates on a 3.0 V to 5.5 V supply with typical current consumption of 0.8 mA. It features an SMBus/I2C interface supporting fast mode up to 400 kHz, an SMBALERT interrupt for error signaling, and a FULL_SPEED input for hardware-controlled maximum fan speed.

Feature Summary

• Monitors multiple daisy-chained TMP05 temperature sensors and controls four fans independently
• Supports automatic or manual fan speed control loops with programmable limits
• Provides SMBALERT interrupt output for system notification of out-of-limit conditions
• Features a FULL_SPEED input for external hardware override to maximum fan speed

Applications

• Servers
• Networking and telecommunications equipment
• Desktops

Procurement Notes

Verify the specific package variant (QSOP-16) and ordering suffix against the manufacturer's latest datasheet revision E documentation. Confirm that the serial bus address configuration matches the system requirements, as the ADDR pin determines the SMBus slave address. Ensure compatibility with the host controller's I2C/SMBus voltage levels and timing specifications before integration.

Selection Notes

Select this component when a system requires centralized monitoring of multiple thermal zones alongside independent control of several cooling fans. It is suitable for designs needing hardware-level fault detection via the SMBALERT line without constant polling. Consider the available GPIO pins if additional digital control functions are required beyond standard fan and temperature operations.

Part Context

This part belongs to the Analog Devices ADT7470 series of thermal management controllers. It is specifically engineered for high-density server and networking applications where precise thermal regulation and multi-fan synchronization are critical. The device integrates both sensing and actuation capabilities into a single integrated circuit.

Replacement Considerations

Consult official Analog Devices documentation for confirmed substitute part numbers within the same product family or cross-reference lists.