ADM1034ARQZ

Overview

The ADM1034ARQZ is a thermal monitor and fan speed controller featuring one local and two remote temperature channels with ±1°C accuracy. It supports SMBus 2.0, 1.1, and 1.0 interfaces via an 8-level LOCATION input for address configuration. The device controls two cooling fans using a programmable look-up table for linear or discrete speed profiles. Operating on a 3.0 V to 5.5 V supply, it includes fail-safe overtemperature outputs, THERM I/O for PROCHOT timing, and FAN_FAULT detection in a 16-lead QSOP package.

Feature Summary

• Dual-channel remote and single local temperature sensing with high accuracy
• Programmable fan speed control using linear or discrete look-up tables
• SMBus 2.0 compatibility with ARP-capable and fixed/discoverable modes
• Integrated fault detection including fan stall and overtemperature alerts

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 Pb-free status as documented. Confirm that the LOCATION pin resistor network matches the required SMBus mode (ARP-capable or fixed/discoverable) for the target system address assignment. Ensure pull-up resistors are included for open-drain outputs like ALERT, SDA, and DRIVE pins.

Selection Notes

Select this component when dual remote sensor monitoring and active fan control are required within a microprocessor-based system. The device is suitable for applications needing precise temperature tracking with ±1°C accuracy across local and external diodes. Consider the SMBus interface requirements and the need for programmable thermal thresholds before finalizing the design.

Part Context

Manufactured by onsemi, the ADM1034 belongs to the ADM1034 series of thermal management ICs. It integrates analog multiplexing, ADC, and digital control logic into a single chip. The part replaces earlier versions or similar monitors by offering enhanced SMBus 2.0 features and flexible fan control algorithms in a compact surface-mount package.

Replacement Considerations

Public confirmed substitute part numbers: None identified in official documentation.