ADM1022ARQZ

Overview

The ADM1022ARQZ is a low-cost temperature monitor and fan controller ASIC manufactured by Analog Devices, housed in a 16-lead QSOP package. It operates within a supply voltage range of 3.0 V to 5.5 V with a typical supply current of 2.6 mA during active ADC operation. The device features an on-chip bandgap sensor with ±3 °C accuracy and supports two remote diode channels with ±5 °C accuracy at 85°C. It includes a single-channel 8-bit DAC for analog fan speed control (0–2.5 V output) and dual voltage monitors for brownout detection. Communication is handled via a System Management Bus (SMBus) interface supporting up to 400 kHz clock frequency.

Feature Summary

• Dual-channel external temperature measurement capability using remote diodes or diode-connected transistors alongside an integrated on-chip sensor.
• Integrated fault-tolerant fan control system featuring an 8-bit DAC for analog speed regulation and automatic hardware trip points.
• System Management Bus (SMBus) serial interface allowing programmable limit comparisons and register configuration.
• Brownout detection circuitry with two independent supply voltage monitors driving reset outputs.

Applications

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

Procurement Notes

Verify the manufacturer designation carefully, as the component is produced by Analog Devices despite the requested brand being onsemi. Confirm the specific suffix ARQZ corresponds to the 16-lead QSOP package and industrial temperature range. Ensure compatibility with SMBus protocols before integration into existing monitoring architectures.

Selection Notes

Select this component when a microprocessor-based system requires simultaneous thermal management and fan speed regulation. It is suitable for environments needing brownout protection and precise temperature monitoring via both internal and external sensors. Verify that the required SMBus address configuration via the ADD pin does not conflict with other bus devices.

Part Context

The ADM1022 belongs to the ADM1022 family of temperature monitors. It serves as a dedicated hardware monitoring solution for PC and server architectures. The ARQZ variant specifically denotes the 16-lead QSOP package option designed for surface-mount assembly in compact electronic systems requiring thermal oversight.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should consult official Analog Devices resources for cross-reference data or evaluate alternative PMICs with similar SMBus interfaces and fan control capabilities.