The ADM1185 is an integrated, 4-channel, voltage monitoring and sequencing device. A 2.7 V to 5.5 V power supply is required on the VCC pin. The ADM1185 monitors four supplies via 0.8% accurate comparators, and provides power supply sequencing and fault protection using a logical core with internal timeouts. The inputs can be programmed to monitor different voltage levels with resistor dividers, and three open-drain enable outputs, and an open-drain power-good output (PWRGD) are provided. The ADM1185 is packaged in a 10-lead MSOP. Applications include monitor and alarm functions, power supply sequencing, telecommunications and data communication equipment, and PCs/servers.
The ADM1185 integrates four precision comparators to monitor separate voltage rails and a digital core that provides sequencing and fault protection. It operates from a 2.7 V to 5.5 V supply, offers three open‑drain enable outputs (OUT1‑OUT3) and a common power‑good output (PWRGD), and is packaged in a 10‑lead MSOP.
Typical applications include power‑supply monitoring, power‑up sequencing for telecom and data‑communication equipment, and PCs/servers. The device features programmable voltage thresholds via external resistor dividers, internal timing delays for controlled start‑up, and robust protection against over‑voltage and undervoltage conditions.
| Operating Voltage Range (VCC) | 2.7 V to 5.5 V |
|---|---|
| Supply Current (I_VCC) typical | 80 µA |
| Input Rising Threshold (V_THR) typical | 0.6000 V |
| Output Low Voltage (V_OUTL) at VCC=2.7 V | 0.4 V |
| Leakage Current (I_ALERT) max | ±1 µA |
| VIN1 to OUT1 Rising Delay typical | 190 ms |
| Number of Open‑Drain Outputs | 4 (OUT1‑OUT3, PWRGD) |
The device operates from a VCC supply of 2.7 V to 5.5 V.
It provides four open‑drain outputs: OUT1, OUT2, OUT3, and PWRGD.
Typical supply current is about 80 µA.
Yes, the datasheet includes a section on cascading multiple devices.