ADM1033ARQZ

Overview

The ADM1033ARQZ is a thermal monitor and fan speed controller featuring one local and one remote temperature channel. It provides ±1°C accuracy for both channels and supports up to 64 measurements per second. The device operates on a 3.0 V to 5.5 V supply and communicates via an SMBus 2.0 interface. It includes a look-up table for temperature-to-fan speed control, programmable over/undertemperature limits, and fault queue capabilities.

Feature Summary

• Monitors local ambient and remote diode temperatures with high precision
• Controls cooling fan speed using linear or discrete lookup table profiles
• Supports SMBus 2.0 ARP-capable and fixed/discoverable addressing modes
• Provides fail-safe overtemperature comparator and fan stall detection outputs

Applications

• Desktop and notebook PCs
• Embedded systems
• Telecommunications equipment
• LCD projectors

Procurement Notes

Verify the specific ordering suffix ARQZ corresponds to the 16-lead QSOP package and lead-free status. Confirm that the LOCATION pin configuration matches the required SMBus version (ARP-capable vs. fixed/discoverable) for the target system design. Ensure pull-up resistors are included for open-drain outputs like SDA, SCL, and ALERT as specified in the datasheet.

Selection Notes

Select this component when precise monitoring of both processor die and ambient temperatures is required alongside active fan control. The device is suitable for systems needing SMBus integration with address resolution protocol support. Consider the 16-lead QSOP package constraints and the need for external pull-up resistors on serial bus lines during circuit design.

Part Context

Manufactured by onsemi, the ADM1033 belongs to a family of thermal management ICs designed for microprocessor-based systems. It integrates analog multiplexing, ADC, and digital logic to simplify thermal monitoring architectures. The device replaces discrete sensor and fan control circuits, reducing board space and component count in complex cooling solutions.

Replacement Considerations

Check for ADM1030 variants if only local temperature monitoring is needed without remote channel support. Verify compatibility with ADM1033 revisions regarding SMBus timing parameters. Ensure any substitute maintains the 16-lead QSOP footprint and compatible voltage ranges.