The ADM811/ADM812 are reliable voltage monitoring devices suitable for use in most voltage monitoring applications. They have specified over temperature, low power consumption, precision voltage monitoring, and built-in manual reset, among other features.
The ADM811 and ADM812 are low‑power voltage‑monitoring devices available in several voltage options (2.5 V, 3 V, 3.3 V, 5 V). They feature a manual reset input, configurable reset thresholds, and both active‑low (ADM811) and active‑high (ADM812) reset outputs. The document details functional block diagrams, pin configurations, and typical performance curves.
Key sections include specifications, absolute maximum ratings, ESD precautions, pin function tables, and circuit information for integrating the devices into microprocessor systems, automotive and safety applications. The handbook also covers reset timing, glitch immunity, and guidelines for ensuring a valid reset output down to 0 V.
| Supply Voltage Range | 1.0 V to 5.5 V |
|---|---|
| Supply Current (typical) | 15 pA |
| Reset Voltage Threshold (ADM81xL typical) | 4.63 V |
| Reset Active Timeout Period | 140 ms to 560 ms |
| Manual Reset Minimum Pulse Width | 10 µs |
| Glitch Immunity | 100 ns |
| Terminal Voltage Rating | -0.3 V to +6 V |
| Operating Temperature Range | -40 °C to +85 °C |
The devices operate from 1.0 V up to 5.5 V supply voltage.
The reset output remains active for about 140 ms (ADM811) or 240 ms (ADM812) after Vcc rises above the threshold.
The manual reset input provides glitch immunity of 100 ns.