ADM8691ARN

Supervisors Overview

The ADM8691ARN is a microprocessor supervisory circuit from Analog Devices, designed for power supply monitoring and battery backup control. It features a watchdog timer with selectable periods of 100 ms or 1.6 seconds, alongside an adjustable mode. The device provides automatic switching between main and backup power sources with minimal voltage drop, supporting high current drive up to 100 mA. It operates within a specified temperature range and includes a reset output driver.

Supervisors Feature Summary

• Integrated watchdog timer with fixed or adjustable timeout intervals
• Automatic power switching between main and backup supplies
• High current drive capability for direct load management
• Low standby current consumption for energy efficiency

Supervisors Applications

• Microprocessor system reset generation
• Battery backup power management circuits
• Voltage supervision in embedded systems
• Watchdog timer implementation for system reliability

Supervisors Procurement Notes

Verify the specific suffix 'ARN' against the official Analog Devices datasheet to confirm package type and temperature grade. Confirm availability status as this part number may be obsolete or superseded by newer variants such as ADM8691ARNZ. Ensure the selected component matches the required pinout and electrical specifications for the target application design.

Supervisors Selection Notes

Select this component when a single-chip solution for both voltage supervision and battery backup switching is required. Consider the high current drive capability if direct load driving is necessary without external transistors. Evaluate the watchdog timer options against the system's fault detection requirements. Verify that the operating voltage range aligns with the primary power rail being monitored.

Supervisors Part Context

The ADM8691 belongs to the ADM8690–ADM8695 family of supervisory circuits manufactured by Analog Devices. This family provides integrated solutions for power supply monitoring and battery control. The ADM8691 specifically combines voltage supervision with a watchdog timer and power switching functionality in a single package, simplifying design complexity for critical system protection.

Supervisors Replacement Considerations

The ADM8691ARNZ is listed as a direct substitute for the ADM8691ARN. Verify compatibility regarding RoHS compliance and package dimensions before replacement.