Analog Devices Inc. ADM1184ARMZ-REEL7

Overview

ADM1184ARMZ-REEL7 from Analog Devices is a quad-channel voltage monitor IC with 0.8% threshold accuracy, operating from 2.7 V to 5.5 V supply, featuring four 0.6 V precision comparators, three open-drain enable outputs (OUT1–OUT3), and one open-drain power-good output (PWRGD) with 190 ms typical assertion delay - used for supply sequencing and system power integrity monitoring in microprocessor systems and telecom equipment.

For engineers reviewing the ADM1184ARMZ-REEL7 datasheet, ADM1184ARMZ-REEL7 pinout, ADM1184ARMZ-REEL7 application, or ADM1184ARMZ-REEL7 equivalent, key selection considerations include its 10-lead MSOP package, 30 µs typical propagation delay per channel, guaranteed valid outputs down to VCC = 1 V, and resistor-programmable trip points for monitoring rails such as 1.2 V, 1.8 V, 2.5 V, and 3.3 V.

Technical Context

The ADM1184ARMZ-REEL7 integrates four independent voltage comparators sharing a common 0.6 V internal reference with ±0.8% worst-case accuracy over −40°C to +85°C. Each VINx input accepts externally scaled rail voltages via resistor dividers, enabling flexible threshold configuration without external references.

Its output architecture uses open-drain logic: OUT1–OUT3 are individually tied to VIN1–VIN3 and assert high only when their respective input exceeds 0.6 V; PWRGD asserts only after all four inputs exceed threshold and remains asserted for 190 ms, deasserting immediately upon any single undervoltage event - supporting robust power-up sequencing and fault detection.

Key Specifications

Pinout & Package

ADM1184ARMZ-REEL7 is housed in a 10-lead Mini Small Outline Package (MSOP), JEDEC MO-187-BA compliant, with 0.5 mm pitch and 3.0 mm × 3.0 mm footprint - optimized for space-constrained PCB layouts in server and embedded applications.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad-voltage monitoring applications.

Compared with TPS3307-33DGNR and MAX6816EUT+T, ADM1184ARMZ-REEL7 uniquely integrates four independently scalable inputs, three dedicated enable outputs, and a delayed common PWRGD - delivering complete sequencing control in a single 10-pin MSOP, reducing design complexity and validation effort.

Availability

ADM1184ARMZ-REEL7 is available at Aetrix Electronics and suitable for telecom infrastructure, server board design, and industrial PLC development requiring stable component supply, RoHS-compliant packaging, and long-term production continuity.

Supply support for ADM1184ARMZ-REEL7 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets since 1965.

The ADM1184ARMZ-REEL7 belongs to Analog Devices' precision voltage monitoring product line, engineered specifically for reliable power sequencing, rail supervision, and system-level power-good generation in high-density computing and infrastructure platforms.

FAQ

What is the function of the PWRGD pin on the ADM1184ARMZ-REEL7?

The PWRGD pin on the ADM1184ARMZ-REEL7 is an open-drain, active-high power-good output that asserts only after all four VINx inputs exceed their 0.6 V threshold and remain stable for a typical 190 ms delay. It deasserts immediately if any monitored rail falls below threshold, providing a system-level indication of overall power integrity. This behavior makes ADM1184ARMZ-REEL7 suitable for synchronizing processor reset release or enabling downstream logic only after full power stabilization.

Can the ADM1184ARMZ-REEL7 monitor a 1.2 V rail directly?

No, the ADM1184ARMZ-REEL7 cannot monitor a 1.2 V rail directly because its internal comparators reference a fixed 0.6 V threshold. To monitor 1.2 V, an external resistor divider must scale the rail down to 0.6 V at the VINx pin - for example, using equal 10 kΩ resistors to halve the voltage. The ADM1184ARMZ-REEL7's design requires this scaling for any rail above 0.6 V, and its 0.8% threshold accuracy ensures the resulting trip point remains within ±10 mV of target.

What is the minimum VCC voltage required for valid operation of the ADM1184ARMZ-REEL7?

The ADM1184ARMZ-REEL7 guarantees valid output states - meaning OUT1, OUT2, OUT3, and PWRGD will drive either low or a defined logic level - down to VCC = 1 V. However, full functional operation (including specified propagation delay, threshold accuracy, and supply current) requires VCC between 2.7 V and 5.5 V. This 1 V minimum enables fail-safe behavior during brownout conditions, allowing ADM1184ARMZ-REEL7 to maintain predictable output states even as system supply collapses.

How does the ADM1184ARMZ-REEL7 support power supply sequencing?

The ADM1184ARMZ-REEL7 supports power supply sequencing through three dedicated open-drain enable outputs (OUT1–OUT3), each tied to a specific VINx input. When VIN1 exceeds 0.6 V, OUT1 asserts and can enable Regulator 1; its output then powers the next rail, monitored by VIN2, which asserts OUT2 to enable Regulator 2, and so on. This cascaded enable scheme - combined with PWRGD asserting only after all rails are stable - implements deterministic, self-timed sequencing without external controllers. ADM1184ARMZ-REEL7 thus replaces discrete timing circuits and multiple supervisors in complex multi-rail systems.

Is the ADM1184ARMZ-REEL7 RoHS compliant and what package does it use?

Yes, the ADM1184ARMZ-REEL7 is RoHS compliant (denoted by the "Z" suffix) and is packaged in a 10-lead Mini Small Outline Package (MSOP), JEDEC MO-187-BA compliant, with 0.5 mm lead pitch and 3.0 mm × 3.0 mm body size. This compact, surface-mount package supports automated assembly and meets IPC/JEDEC standards for thermal and mechanical reliability in industrial and telecom applications. The "REEL7" suffix indicates tape-and-reel packaging with 1,000 units per reel, optimized for SMT production lines.