ADM695AQ

Supervisors Overview

The ADM695AQ is a microprocessor supervisory circuit from Analog Devices, designed for power supply monitoring and battery control in MPU systems. It operates within a voltage range of 4.75 V to 5.5 V with a threshold voltage of 4.65 V. Key electrical parameters include a reset delay time of 200 ms, an accuracy of 1.7%, and a maximum power dissipation of 600 mW. The device features open collector outputs and includes a watchdog timer. It functions reliably across a temperature range of -40°C to +85°C.

Supervisors Feature Summary

• Provides complete single-chip solutions for power supply monitoring and battery backup switchover in microprocessor systems.
• Integrates a watchdog timer with selectable periods of 100 ms, 1.6 s, or adjustable timing.
• Features extremely fast gating of chip enable signals with a response time of 5 ns.
• Supports automatic battery backup power switching with low switch-on resistance.

Supervisors Applications

• Microprocessor systems requiring precise voltage supervision
• Computer and controller hardware
• Intelligent instruments needing power failure warning
• Automotive systems with strict environmental tolerances

Supervisors Procurement Notes

Verify the specific suffix 'AQ' indicates the commercial temperature grade (-40°C to +85°C) and ceramic DIP package variant. Confirm that the part number matches the exact pinout and output configuration required by the design. Ensure compatibility with existing PCB footprints for the 16-lead CERDIP package before finalizing procurement orders.

Supervisors Selection Notes

Select this component when a dedicated supervisory IC with integrated watchdog and battery backup switching is required. It is suitable for designs needing high accuracy (1.7%) and fast chip enable gating. Consider the 16-lead ceramic DIP package constraints and the specific 4.65 V threshold relative to the system's 5 V rail stability requirements.

Supervisors Part Context

The ADM695AQ belongs to the ADM690–ADM695 family of supervisory circuits manufactured by Analog Devices. This family offers various configurations for microprocessor reset, RAM write protection, and power failure warnings. The AQ variant specifically denotes the commercial temperature range and ceramic dual in-line package construction.

Supervisors Replacement Considerations

The ADM695AN serves as a direct functional substitute within the same family, sharing identical electrical characteristics but differing in package type (PDIP vs. CERDIP). Verify pin compatibility and thermal performance differences between plastic and ceramic packages when substituting.

Supervisors FAQ

What is the reset delay time for the ADM695AQ?

The reset delay time is specified as 200 ms.

Does the ADM695AQ include a manual reset input?

No, the standard ADM695 configuration does not include a manual reset input; it relies on automatic detection of power faults.

What is the operating temperature range for the ADM695AQ?

The ADM695AQ is rated for operation from -40°C to +85°C.