ADM1022ARQZ-REEL

Overview

The ADM1022ARQZ-REEL is a low-cost temperature monitor and fan control ASIC manufactured by Analog Devices, packaged in a 16-lead QSOP. 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 sensor with ±1°C accuracy at 85°C and supports two remote diode channels with ±3°C accuracy. It includes a System Management Bus (SMBus) interface for data access, a single analog output DAC for fan speed control, and dual voltage monitors for brownout detection.

Feature Summary

• Supports measurement of one or two remote thermal diodes alongside an on-chip ambient temperature sensor.
• Provides fault-tolerant fan control via an analog output DAC and automatic hardware trip points.
• Integrates dual supply voltage monitors for brownout detection and manual reset capabilities.

Applications

• Microprocessor-based personal computers
• Network servers
• Electronic test equipment

Procurement Notes

Verify the manufacturer designation carefully, as the datasheet identifies Analog Devices as the producer while the model suffix suggests onsemi distribution. Confirm the specific package type and revision level against the official documentation to ensure compatibility with existing system designs.

Selection Notes

Select this component for systems requiring SMBus connectivity and integrated fan management. Ensure the design accommodates the 16-lead QSOP footprint and provides adequate bypass capacitance near the power pins to maintain signal integrity during operation.

Part Context

This part belongs to the ADM1022 family of hardware monitoring ICs. It serves as a dedicated solution for thermal management in computing environments, combining sensing, communication, and actuation functions into a single integrated circuit.

Replacement Considerations

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

FAQ

How is the SMBus address determined?

The lowest order bits of the 7-bit address are determined by the logical state of Pin 13 (ADD/NTEST_OUT) at power-up, allowing for three different addresses.

What is the function of the FAN_SPD pin?

It serves as an active-high input for NAND board-level testing or, when not selected, as an analog output from an 8-bit DAC for fan speed control.