ADM1029ARQZ-R7

Overview

The ADM1029ARQZ-R7 is a dual PWM fan controller and temperature monitor designed for high-availability systems. It operates on a 3.0 V to 5.5 V supply with typical current consumption of 1.5 mA (ADC active) or 10 µA (shutdown). The device features an internal sensor accuracy of ±1.0 °C and supports external diode sensors with ±3.0 °C accuracy. It communicates via SMBus, supports up to eight devices per bus, and includes interrupt and cascadable fault outputs.

Feature Summary

• Dual PWM fan speed control with independent tachometer inputs
• Integrated local and remote temperature monitoring capabilities
• SMBus serial interface supporting multiple device addressing
• Hardware-based automatic fan speed control and hot-swap support

Applications

• Network servers and personal computers
• Microprocessor-based office equipment
• High availability telecommunications equipment

Procurement Notes

Verify the specific ordering suffix R7 indicates reel packaging when sourcing. Confirm the component status as obsolete or discontinued through official manufacturer channels prior to finalizing procurement plans. Ensure compatibility with existing system voltage rails and thermal requirements.

Selection Notes

Select this component for applications requiring precise thermal management in redundant cooling architectures. The integrated SMBus interface simplifies host processor integration. Verify that the 24-lead QSOP package fits the available PCB real estate and that the operating temperature range meets environmental specifications.

Part Context

Manufactured by onsemi, the ADM1029 belongs to a family of thermal management controllers. It replaces legacy discrete fan control circuits by integrating analog sensing, digital conversion, and PWM generation into a single monolithic IC, reducing board space and design complexity for server and telecom cooling solutions.

Replacement Considerations

No public confirmed substitute part numbers are available.