Analog Devices Inc. ADM1166ASUZ-REEL7

Overview

ADM1166ASUZ-REEL7 from Analog Devices is a configurable supervisory and sequencing IC for multivoltage systems, integrating 10 supply fault detectors (±1% accuracy), a 12-bit SAR ADC, six 8-bit DACs (0.300 V–1.551 V output), nonvolatile black-box fault recording (16-event depth), and SMBus-programmable sequencing engine with up to 63 states. It enables closed-loop voltage margining and power-up/power-down sequencing in server line cards.

For engineers reviewing the ADM1166ASUZ-REEL7 datasheet, ADM1166ASUZ-REEL7 pinout, ADM1166ASUZ-REEL7 application, or ADM1166ASUZ-REEL7 equivalent, key selection considerations include its dual-mode VXx inputs (analog SFD or digital logic), charge-pumped high-voltage PDO outputs (up to 14 V), 40-lead 6 mm × 6 mm LFCSP package, and support for in-circuit supply margining via DAC trim-node injection.

Technical Context

The ADM1166ASUZ-REEL7 implements a state-machine-based Sequencing Engine (SE) with 63 programmable states, enabling conditional output transitions based on input events (e.g., supply OK, fault, timeout). Its 10-input supervision architecture supports mixed analog/digital configuration: VH and VP1–VP4 use selectable attenuators for 0.573 V–14.4 V detection ranges, while VX1–VX5 operate as high-impedance SFDs or CMOS/TTL logic inputs.

Power is arbitrated from the highest of VH (up to 14.4 V) or VPx (up to 6.0 V), regulating VDDCAP to 4.75 V ±0.65 V. Six PDOs (PDO1–PDO6) integrate internal charge pumps for N-FET gate drive (12.5 V typical at 1 μA load); remaining PDOs (PDO7–PDO10) support push-pull or open-collector modes referenced to VDDCAP or VPx.

Key Specifications

Pinout & Package

ADM1166ASUZ-REEL7 is housed in a 40-lead, 6 mm × 6 mm LFCSP package with exposed pad (NC, recommended for mechanical stability). Power is derived from VH or VPx pins; VDDCAP requires a 10 μF decoupling capacitor to GND. The device uses dedicated ground pins (GND, AGND, REFGND, PDOGND) for noise isolation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar multirail supervisory and sequencing applications.

Compared with ADM1168ASTZ, ADM1166ASUZ-REEL7 offers superior board-area efficiency and thermal performance in LFCSP, while versus TPS659122ZQWR it delivers specialized supervision features-nonvolatile fault logging, closed-loop margining, and complex state-driven sequencing-that are absent in general-purpose PMICs.

Availability

ADM1166ASUZ-REEL7 is available at Aetrix Electronics and suitable for server/routers, multivoltage system line cards, and DSP/FPGA supply sequencing requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for ADM1166ASUZ-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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.

The ADM1166ASUZ-REEL7 belongs to Analog Devices' Super Sequencer® family, designed specifically for intelligent power supervision and sequencing in high-reliability multirail systems such as telecom infrastructure and enterprise servers.

FAQ

What is the primary function of the ADM1166ASUZ-REEL7 in a multivoltage system?

The ADM1166ASUZ-REEL7 serves as a centralized supervisory and sequencing controller, monitoring up to 10 supply rails with ±1% accuracy, executing programmable power-up/down sequences via its 63-state sequencing engine, and enabling closed-loop voltage margining using six integrated 8-bit DACs and a 12-bit ADC. It replaces discrete supervisors and timers in complex systems like servers and line cards.

How does the ADM1166ASUZ-REEL7 handle power supply redundancy?

The ADM1166ASUZ-REEL7 implements automatic power arbitration from the highest of VH (up to 14.4 V) or VPx (up to 6.0 V) inputs, regulating VDDCAP to 4.75 V. This architecture ensures continuous operation during single-rail brownout or hot-swap events, with minimal dropout (~0.2 V) and reservoir support from a 10 μF VDDCAP capacitor.

Can the ADM1166ASUZ-REEL7 perform in-circuit voltage margining without external components?

Yes-the ADM1166ASUZ-REEL7 integrates six 8-bit DACs (0.300 V–1.551 V output) and a 12-bit ADC to form a self-contained closed-loop margining system. DAC outputs connect directly to dc-dc converter trim/feedback nodes, while the ADC reads back actual rail voltages, enabling automated production testing at ±5% margins with no external instrumentation.

What fault data does the nonvolatile black-box recorder store in the ADM1166ASUZ-REEL7?

The ADM1166ASUZ-REEL7's 16-event nonvolatile EEPROM fault recorder stores timestamped entries including fault type (e.g., undervoltage on VP2), input voltage levels at trigger, sequencing engine state, and associated PDO output states. Records persist even during total power loss, supporting deterministic post-failure analysis in telecom and server applications.

Which package variant does the ADM1166ASUZ-REEL7 use, and why is it significant?

The ADM1166ASUZ-REEL7 uses a 40-lead, 6 mm × 6 mm LFCSP package with exposed pad. This compact, thermally efficient封装 enables high-density routing in space-constrained server and line card designs, while the exposed pad improves thermal dissipation-critical for sustained operation in ambient temperatures up to +85°C.