ADM1022ARQZ-REEL7

Overview

The ADM1022ARQZ-REEL7 is a low-cost temperature monitor and fan control ASIC manufactured by Analog Devices. It operates within a supply voltage range of 3.0 V to 5.5 V with a typical supply current of 2.6 mA. The device features an internal bandgap temperature sensor with ±3 °C accuracy and supports two external diode sensors with ±5 °C accuracy, both offering 1 °C resolution. It includes a System Management Bus (SMBus) interface for data readout and limit programming, a single analog output DAC producing 0 V to 2.5 V for fan speed control, and two supply voltage monitors for brownout detection. The component is housed in a 16-lead QSOP package.

Feature Summary

• Supports measurement of one or two remote thermal diodes alongside an on-chip sensor for comprehensive thermal monitoring.
• Integrates a fault-tolerant fan control mechanism with automatic hardware trip points that drive fans to full speed upon exceeding limits.
• Provides dual interrupt outputs and manual reset capabilities for system protection and status indication.
• Enables serial configuration via SMBus for programmable limit comparisons and address selection.

Applications

• Network servers and personal computers
• Microprocessor-based office equipment
• Test equipment and measuring instruments

Procurement Notes

Verify the manufacturer designation as Analog Devices despite the input brand listing. Confirm the specific package type is 16-Lead QSOP and the operating temperature range is 0 °C to 85 °C. Ensure the ordering suffix matches the reel packaging requirement for automated assembly processes.

Selection Notes

Select this component for systems requiring integrated thermal management and fan control without external microcontrollers. Consider the SMBus interface compatibility with existing master controllers. Evaluate the need for remote diode sensing versus relying solely on the internal sensor based on proximity to heat sources.

Part Context

This part belongs to the ADM1022 family of hardware monitoring ASICs designed for PC and server environments. It consolidates temperature sensing, fan driving, and voltage monitoring into a single low-cost solution, reducing bill-of-materials complexity compared to discrete implementations.

Replacement Considerations

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