ADM800MARNZ

Supervisors Overview

The ADM800MARNZ is a voltage supervisory circuit manufactured by Analog Devices Inc., housed in a 16-pin SOIC package. It monitors a single input with a threshold voltage of 4.4 V and an overvoltage threshold of 4.5 V. The device features an open-drain output, a reset delay time of 200 ms, and includes a watchdog timer and battery backup switch functionality. It operates within a supply voltage range up to 5.5 V, consumes 100 uA of working current, and dissipates 700 mW of power. The component supports chip enable signals but lacks manual reset capability, functioning across temperatures from -40 C to +85 C.

Supervisors Feature Summary

• Integrates a watchdog timer for system fault detection alongside voltage supervision capabilities.
• Includes a battery backup switch mechanism to manage power transitions between primary and secondary sources.
• Provides an open-drain output configuration compatible with CMOS logic processes.

Supervisors Applications

• Monitoring power supply integrity in embedded systems requiring voltage supervision.
• Implementing watchdog functions in microcontroller-based designs to prevent software lockups.
• Managing power source switching in devices utilizing battery backup configurations.

Supervisors Procurement Notes

Verify component authenticity through authorized channels due to end-of-life status. Confirm package integrity and pin alignment against the SOIC-16 specification. Review datasheet revisions for any parameter updates prior to integration. Ensure design compatibility with existing voltage thresholds and timing requirements. Check for alternative sourcing options given potential availability constraints.

Supervisors Selection Notes

Evaluate the 4.4 V threshold against target supply rails to ensure accurate triggering. Consider the 200 ms reset delay for system startup synchronization needs. Assess the open-drain output interface for level shifting or pull-up resistor requirements. Verify that the 100 uA quiescent current aligns with power budget constraints. Confirm thermal dissipation limits fit within the application's operating temperature range.

Supervisors Part Context

This component belongs to the ADM800 series of supervisory circuits designed for reliable power management. It addresses common system failures related to voltage drops or glitches. The inclusion of watchdog and backup features distinguishes it from basic reset generators. It serves as a critical protection element in industrial and commercial electronic equipment requiring high reliability.

Supervisors Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. The component is listed as end-of-life, necessitating careful evaluation of legacy support or redesign strategies. Consult manufacturer archives for potential direct replacements if officially documented.