This document introduces the features and characteristics of ADM811/ADM812 products, including low power consumption, precise voltage monitoring, and reset signal output.
The ADM811 and ADM812 are low‑power voltage‑monitoring devices that supervise supply voltages ranging from 1.0 V to 5.5 V. They offer selectable reference levels (2.5 V, 3 V, 3.3 V, 5 V) and provide a reset output that can be active‑low (ADM811) or active‑high (ADM812).
The document includes detailed electrical specifications, absolute maximum ratings, pin‑out diagrams, typical performance curves, and guidance for manual reset and glitch immunity. It also describes interfacing considerations and typical application environments such as microprocessor systems, automotive and safety circuits.
| Supply Voltage Range | 1.0 V – 5.5 V |
|---|---|
| Supply Current (typical) | 15 pA |
| Reset Voltage Threshold (ADM81xL) | 4.54 V – 4.63 V |
| Reset Active Timeout Period | 140 ms – 560 ms |
| Glitch Immunity | 100 ns |
The manual reset (MR) pin is an active‑low debounced input that ignores pulses shorter than 100 ns and accepts pulses longer than 10 µs, allowing a user to reset the circuit manually.
ADM811 provides an active‑low reset output, while ADM812 provides an active‑high reset output.