ADM1025ARQZ-R7

Overview

The ADM1025ARQZ-R7 is a voltage supervisor and reset circuit manufactured by Analog Devices Inc. It operates within an input voltage range of 1.62 V to 5.5 V and provides a fixed output threshold of 4.63 V for monitoring power supply integrity. The device features a programmable watchdog timer with a timeout period ranging from 140 ms to 255 s, configurable via external resistors. It includes a manual reset input pin and supports open-drain or push-pull reset outputs. The component functions reliably across an industrial temperature range of -40°C to +85°C and is housed in a compact 10-lead TSSOP package.

Feature Summary

• Integrates a watchdog timer with adjustable timeout intervals for system fault recovery
• Provides precise voltage supervision with a fixed 4.63 V threshold for critical rail monitoring
• Supports flexible reset output configurations including open-drain and push-pull modes

Applications

• Industrial control systems requiring automated fault detection and recovery
• Embedded computing platforms needing reliable power-on reset sequencing
• Communication equipment utilizing watchdog timers for processor stability

Procurement Notes

Verify the specific suffix R7 indicates reel packaging when sourcing. Confirm the ARQZ designation corresponds to the 10-lead TSSOP package variant. Ensure compatibility with the required 4.63 V threshold for your target voltage rail. Check datasheet specifications for maximum operating current and thermal dissipation limits under your specific load conditions.

Selection Notes

Select this component when a fixed high-voltage threshold near 5 V is required for supervising standard logic rails. The integrated watchdog functionality reduces external component count compared to discrete solutions. Consider the TSSOP package size constraints against available PCB real estate. Verify that the manual reset input aligns with your system's user interface requirements.

Part Context

This part belongs to the ADM1025 family of voltage supervisors designed for robust system management. It complements other Analog Devices PMIC offerings by providing dedicated reset generation rather than power conversion. The series targets applications demanding high reliability in harsh environments without complex configuration overhead.

Replacement Considerations

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