ADM690AN

Supervisors Overview

The ADM690AN is a microprocessor supervisory circuit manufactured by Analog Devices Inc., designed to monitor power supply voltages in electronic systems. It operates within a maximum supply voltage of 5.5 V and features a fixed threshold voltage of 4.65 V for precise monitoring. The device provides an active low reset output with a timeout delay of 200 ms, ensuring stable system initialization. It includes a watchdog timer and battery backup switchover functionality to maintain data integrity during power transitions. The component supports manual reset input and detects power failures, operating reliably across a temperature range of -40°C to +85°C.

Supervisors Feature Summary

• Integrates precision voltage monitoring with a fixed 4.65 V threshold for reliable power supervision.
• Includes a built-in watchdog timer and battery backup switchover mechanism to protect system data.
• Provides active low reset output with a defined 200 ms timeout delay for controlled system restarts.
• Features power failure warning capability to alert the system of abnormal supply conditions.

Supervisors Applications

• Microprocessor reset circuits requiring precise voltage monitoring
• Battery-backed memory systems needing automatic switchover control
• Embedded systems utilizing watchdog timers for fault recovery
• Power supply management in industrial control applications

Supervisors Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels due to limited availability status. Confirm package type matches design requirements, as variations exist between DIP and SOIC formats within the family. Check RoHS compliance documentation for regulatory adherence. Ensure replacement parts are sourced from verified suppliers to avoid counterfeit components. Review current stock levels carefully as inventory may be restricted or subject to allocation constraints.

Supervisors Selection Notes

Select this component when a fixed 4.65 V threshold is required for single-supply monitoring. Consider the PDIP-8 package for through-hole mounting needs. Evaluate the 200 ms reset timeout against system startup timing requirements. Verify that the open collector output configuration aligns with downstream logic interface capabilities. Assess the need for integrated watchdog and battery backup functions before choosing alternative simpler supervisors.

Supervisors Part Context

The ADM690AN belongs to the ADM690 series of microprocessor supervisory circuits from Analog Devices. This family focuses on providing comprehensive power management solutions including reset generation, watchdog timing, and battery backup switching. The part is designed for CMOS process technology, offering low power consumption while maintaining high accuracy in voltage detection. It serves as a critical component in ensuring system reliability during power-up and power-down sequences.

Supervisors Replacement Considerations

ADM690AARMZ is a documented surface-mount equivalent in the same functional family. MAX690RESAT+T offers similar supervisory functions in an SOIC package variant. Verify pin compatibility and electrical specifications before substitution. Ensure thermal and mechanical constraints match the new package format. Confirm that threshold voltages and timeout delays remain consistent with original design intent.