ADM690-ADM695 is a family of supervisory circuits from Analog Devices that offers complete single chip solutions for power supply monitoring and battery control functions in microprocessor systems. These functions include µP reset, backup battery switchover, watchdog timer, CMOS RAM write protection, and power failure warn- ing. The complete family provides a variety of configurations to satisfy most microprocessor system requirements.
The ADM690‑ADM695 family offers complete single‑chip solutions for power‑supply monitoring and battery control in microprocessor systems. Features include power‑on reset, battery backup switching, watchdog timer, voltage monitoring and CMOS RAM write protection.
The devices are available in 8‑pin DIP (ADM690, ADM692, ADM694) and 16‑pin DIP/SOIC (ADM691, ADM693, ADM695) packages, supporting up to 100 mA output current, low standby current and fast chip‑enable gating (5 ns).
| Supply Current (Excludes Igyr) | 1.95 mA typ at 100 mA load |
|---|---|
| Reset Voltage Threshold (typ) | 4.65 V for ADM690/ADM691/ADM694/ADM695 |
| Maximum Output Current (Vour) | 100 mA |
| Watchdog Timeout Period (typ) | 1.6 s |
The reset voltage threshold is typically 4.65 V for the ADM690, ADM691, ADM694 and ADM695 devices.
Vour can supply up to 100 mA of output current.
The nominal watchdog timeout period is preset at 1.6 seconds for the ADM690, ADM692 and ADM694 devices.
The supply current in battery backup mode is typically 0.6 µA.