ADM8690/ADM8691/ADM8695 is a microprocessor supervisory circuit launched by Analog Devices company. It has the characteristics of low power consumption, high precision and high driving current. It is suitable for microprocessor systems, computers, controllers, intelligent instruments and other fields.
The ADM8690, ADM8691 and ADM8695 are single‑chip supervisory circuits that provide microprocessor reset, battery backup switchover, watchdog timer, RAM write protection and power‑fail detection for microprocessor systems, computers, controllers, intelligent instruments and automotive applications. They operate from a 5 V supply, consume low power (0.7 mW) and can drive up to 100 mA output current.
The family is offered in 8‑lead PDIP and SOIC packages for the ADM8690 and in 16‑lead PDIP, SOIC and TSSOP packages for the ADM8691/ADM8695. The datasheet includes electrical specifications, absolute maximum ratings, pin descriptions, typical performance curves and ordering information.
| VCC Operating Voltage Range | 4.75 V – 5.5 V |
|---|---|
| VBATT Operating Voltage Range | 2.0 V – 4.25 V |
| Supply Current (typical) | 140 µA – 200 µA |
| Battery Backup Standby Current | 0.4 µA – 1 µA |
| Reset Voltage Threshold | 4.5 V – 4.73 V (typical 4.65 V) |
| Watchdog Timeout Period (internal oscillator) | 1.0 s – 2.25 s |
| Maximum Output Current | 100 mA |
The reset threshold is typically 4.65 V, with a specified range of 4.5 V to 4.73 V.
Typical supply current is between 140 µA and 200 µA under normal operation.
They are offered in 16‑lead PDIP, standard SOIC, and thin‑shrink TSSOP packages.
The device can source up to 100 mA without an external pass transistor.