ADM690AARN

Supervisors Overview

The ADM690AARN is a microprocessor supervisory circuit manufactured by Analog Devices Inc., designed for precise power supply monitoring. It features a fixed reset threshold voltage of 4.65 V and operates within a supply voltage range of 4.75 V to 5.5 V. The device provides an active high output signal with a typical reset timeout delay of 280 ms. It supports battery backup switchover functionality and includes power fail warning capabilities. The component is housed in an SOIC-8 surface-mount package and functions reliably across an industrial temperature range from -40°C to +85°C, consuming a maximum operating current of 100 µA.

Supervisors Feature Summary

• Integrates precision voltage monitoring with a fixed 4.65 V threshold for reliable system supervision.
• Includes automatic battery backup switchover mechanism to maintain data integrity during power transitions.
• Provides power fail warning indication to alert the system prior to complete voltage loss.
• Delivers a deterministic reset assertion with a standard timeout period for stable microprocessor initialization.

Supervisors Applications

• Microprocessor reset circuits requiring precise voltage threshold detection
• Battery backup systems utilizing automatic switchover logic
• CMOS RAM write protection interfaces
• Power management units needing power failure warning signals

Supervisors Procurement Notes

Verify component authenticity through authorized channels as this part number may be subject to obsolescence or limited availability. Confirm that the specific suffix matches the required package type and thermal specifications for your application. Ensure compliance with RoHS directives if environmental regulations apply to your manufacturing process. Cross-reference datasheet revisions to confirm pinout compatibility before integration into new designs.

Supervisors Selection Notes

Select this component when a fixed 4.65 V threshold is appropriate for the target supply rail. Consider the SOIC-8 package constraints regarding board space and thermal dissipation requirements. Evaluate the need for battery backup switchover versus simpler reset-only solutions. Verify that the active-high output polarity aligns with the receiving logic inputs of the monitored microprocessor or FPGA.

Supervisors Part Context

This device belongs to the ADM690 series of supervisory circuits, which are engineered for comprehensive power management tasks. The series typically includes variants with different thresholds and packages, such as the ADM690AARMZ in MSOP format. These components serve as critical safety elements in embedded systems, ensuring that processors remain in a known state during power-up and power-down sequences while protecting non-volatile memory contents.

Supervisors Replacement Considerations

Public confirmed substitute part numbers include ADM690AARMZ for alternative packaging within the same family. Other compatible devices may include the ADM692A series for different threshold requirements. Always verify electrical parameters and pin configurations against the original design specifications before substitution.