Analog Devices Inc. ADM1063ASU

Overview

ADM1063ASU from Analog Devices is a multisupply supervisory and sequencing IC with integrated 12-bit ADC, temperature monitoring (1 internal + 2 remote diode channels), and 10 programmable driver outputs (PDOs). It supervises up to 10 voltage rails with <1.0% accuracy across −40°C to +85°C, supports supply margining on 6 rails, and implements state-machine-based sequencing via SMBus-configurable EEPROM. It is used in DSP/FPGA power-up control and multivoltage line card supervision.

For engineers reviewing the ADM1063ASU datasheet, ADM1063ASU pinout, ADM1063ASU application, or ADM1063ASU equivalent, key selection criteria include its 10-supply fault detection capability, charge-pumped high-voltage PDO outputs (up to 14 V), dual-mode input flexibility (VXx as SFD or logic inputs), 12-bit ADC readback of all supervised voltages, and support for closed-loop voltage margining.

Technical Context

The ADM1063ASU integrates a deterministic sequencing engine (SE) implementing a 63-state finite state machine, enabling conditional power-up/down sequences triggered by input events (e.g., supply OK, fault, timeout). Its 12-bit SAR ADC performs round-robin conversion across up to 12 channels - including VH, VP1–VP4, VX1–VX5, REFIN, and temperature sensor inputs - with 0.44 ms per conversion and ±2.5 LSB INL.

Power is arbitrated from the highest active supply among VH (3.0–14.4 V) or VPx (3.0–6.0 V), regulating to VDDCAP (2.7–5.4 V); no external regulator is needed. Six PDOs (PDO1–PDO6) feature internally charge-pumped drivers capable of sourcing up to 14 V at ≤1 μA load for N-FET gate control, while PDO7–PDO10 operate as LV logic-level drivers with configurable pull-up targets (VDDCAP or VPx).

Key Specifications

Pinout & Package

ADM1063ASU is available in a 40-lead, 6 mm × 6 mm LFCSP package with exposed pad (NC, recommended for mechanical stability). Pin functions are validated per Analog Devices Rev. D datasheet Figures 3 and Table 4.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADM1062ACPZ and TPS40422RGET, the ADM1063ASU uniquely combines 10-rail supervision, charge-pumped HV outputs for direct N-FET drive, integrated 12-bit ADC readback, and dual remote temperature sensing - making it optimal for high-integration, self-contained power management in space-constrained networking and compute platforms.

Availability

ADM1063ASU is available at Aetrix Electronics and suitable for server/routers, DSP/FPGA supply sequencing, and multivoltage system line cards requiring stable component supply, long-term lifecycle support, and guaranteed traceability.

Supply support for ADM1063ASU 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 since 1965.

The ADM1063ASU belongs to Analog Devices' Power Management and Supervisory IC product line, designed specifically for intelligent, autonomous power sequencing and health monitoring in high-reliability multirail systems.

FAQ

What is the primary function of the ADM1063ASU in a power management system?

The ADM1063ASU serves as a fully integrated multisupply supervisor and sequencer with built-in ADC and temperature monitoring. It replaces discrete comparators, timers, and microcontrollers by autonomously managing up to 10 voltage rails - detecting faults, enforcing power-up/down order, driving FETs via charge-pumped outputs, and reporting health data over SMBus. The ADM1063ASU enables robust, compact, and software-configurable power control in demanding applications like servers and telecom line cards.

Does the ADM1063ASU require an external voltage reference for ADC operation?

No - the ADM1063ASU includes an internal 2.048 V ±0.25% reference (REFOUT) that can be directly connected to REFIN for standard operation. However, an external high-accuracy reference may be used on REFIN to improve ADC gain error to ±0.05%. The ADM1063ASU's REFOUT pin must be decoupled with a minimum 1 μF capacitor to REFGND for stability, as specified in the Rev. D datasheet.

How does the ADM1063ASU handle power supply redundancy and brownout conditions?

The ADM1063ASU uses an internal VDD arbitrator to select the highest valid supply among VH (3.0–14.4 V) or VPx (3.0–6.0 V), regulating it to VDDCAP (2.7–5.4 V). During brownouts, the VDDCAP decoupling capacitor (10 μF recommended) acts as a reservoir, sustaining operation until the next highest supply takes over. This architecture ensures continuous supervision even if one rail fails - a key reliability feature of the ADM1063ASU in mission-critical systems.

Can the VXx pins on the ADM1063ASU be used for both voltage supervision and digital logic inputs?

Yes - each VXx pin (VX1–VX5) is a dual-function terminal. It operates as a high-impedance (1 MΩ) supply fault detector with programmable thresholds from 0.573 V to 1.375 V, or as a general-purpose digital input with VIH ≥ 2.0 V and VIL ≤ 0.8 V. Configuration is done via EEPROM registers; the ADM1063ASU does not require hardware modification to switch modes, providing design flexibility without pin count penalty.

What is the maximum output voltage achievable from the charge-pumped PDOs on the ADM1063ASU?

The charge-pumped PDOs (PDO1–PDO6) on the ADM1063ASU deliver up to 14 V typical at zero load (IOH = 0 μA), with 10.5–13.5 V maintained at 1 μA sink current. This high-voltage capability is generated internally using a charge pump driven from VCCP (5.25 V), eliminating external boost circuitry. The ADM1063ASU's charge-pump architecture enables direct gate drive of N-channel MOSFETs in high-side switching configurations - a defining feature distinguishing it from standard supervisors.