Analog Devices Inc. ADM1069ASTZ-REEL

Overview

ADM1069ASTZ-REEL from Analog Devices is a configurable supervisory and sequencing IC with integrated 12-bit ADC, four 8-bit DACs, and eight programmable driver outputs (PDOs). It monitors up to eight voltage rails with <1.0% accuracy across temperature, implements closed-loop voltage margining for dc-dc converters, and executes state-machine-based power-up/down sequencing. Used in multivoltage server line cards and FPGA/DSP supply control.

For engineers reviewing the ADM1069ASTZ-REEL datasheet, ADM1069ASTZ-REEL pinout, ADM1069ASTZ-REEL application, or ADM1069ASTZ-REEL equivalent, key selection criteria include its 32-lead LQFP package, VH/VPx supply arbitration architecture, charge-pumped high-voltage PDO outputs (up to 14 V), 0.573–14.4 V supervision range, and SMBus-programmable sequencing engine supporting 63 states.

Technical Context

The ADM1069ASTZ-REEL integrates a sequencing engine (SE) - a deterministic state machine with 63 programmable states - that conditions PDO output transitions on input events (e.g., supply OK, fault, timer expiry), enabling complex power-up/down and fault-handling sequences. Its dual-function VXx inputs serve either as high-impedance (1 MΩ) fault detectors with 0.573–1.375 V thresholds or as general-purpose logic inputs.

Power is derived from the highest active VPx (3.0–6.0 V) or VH (3.0–14.4 V) rail via an internal arbitrator, generating a regulated 4.75 V VDDCAP supply. The device includes a 90–110 kHz on-chip oscillator driving all timing functions, and supports SMBus communication with 400 kHz clock, 100 ns data setup, and 5 ns hold time.

Key Specifications

Pinout & Package

ADM1069ASTZ-REEL is housed in a 32-lead, 7 mm × 7 mm LQFP package with exposed thermal pad (not electrically connected). Pin 1 is marked by corner notch; all ground pins (GND, AGND, REFGND, PDOGND) must be tied together in layout. VDDCAP requires a mandatory 10 µF decoupling capacitor to GND.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADM1066ASTZ-REEL and TPS659122ZQWR, the ADM1069ASTZ-REEL uniquely combines high-voltage FET drive capability, field-reprogrammable sequencing logic, and precision closed-loop margining - making it the only option for production-grade in-circuit voltage tolerance validation and adaptive power path control in telecom and server platforms.

Availability

ADM1069ASTZ-REEL 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 traceable sourcing.

Supply support for ADM1069ASTZ-REEL 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, headquartered in Norwood, MA.

The ADM1069ASTZ-REEL belongs to Analog Devices' Super Sequencer® family, designed specifically for intelligent, software-configurable power supervision and sequencing in complex multivoltage systems found in datacenter, telecom, and high-reliability embedded applications.

FAQ

What is the primary function of the ADM1069ASTZ-REEL in a power management system?

The ADM1069ASTZ-REEL serves as a centralized supervisory and sequencing controller that monitors up to eight voltage rails with ±1.0% accuracy, executes programmable power-up/down sequences via its 63-state sequencing engine, and performs closed-loop voltage margining using four integrated 8-bit DACs. It replaces discrete supervisors, timers, and margining circuitry in systems such as servers and FPGA carrier boards, reducing design complexity and improving reliability through deterministic state-machine control.

Does the ADM1069ASTZ-REEL support hot-swap capable 12 V backplane monitoring?

Yes, the ADM1069ASTZ-REEL supports 12 V backplane monitoring via its VH pin, which accepts input voltages up to 14.4 V. However, Analog Devices recommends using a hot-swap controller upstream of the VH pin to protect against transients during insertion/removal. The device's supply arbitration ensures continued operation even if the 12 V rail dips momentarily, thanks to the VDDCAP reservoir capacitor maintaining internal bias during brownouts.

How does the ADM1069ASTZ-REEL implement closed-loop voltage margining?

The ADM1069ASTZ-REEL implements closed-loop voltage margining by using its four 8-bit DACs to inject precise trim voltages into the feedback node of dc-dc converters, while simultaneously measuring the resulting rail voltage via its 12-bit SAR ADC. The sequencing engine or host processor compares measured values against target margins (e.g., −5%) and adjusts DAC codes iteratively until the desired deviation is achieved - all without external components beyond standard decoupling capacitors.

What are the key differences between PDO1–PDO6 and PDO7–PDO8 on the ADM1069ASTZ-REEL?

PDO1–PDO6 support charge-pumped high-voltage operation (up to 14 V at 1 µA), enabling direct gate drive of external N-FETs in supply paths without level shifters. PDO7–PDO8 operate only in low-voltage modes - push-pull or open-collector referenced to VDDCAP or VPx - and are intended for logic-level enables, resets, or status signals. This dual-driver architecture allows simultaneous control of high-side FETs and digital control signals from a single IC.

Can the ADM1069ASTZ-REEL sequencing configuration be updated in-system without reflashing hardware?

Yes, the ADM1069ASTZ-REEL supports full in-system sequencing reconfiguration via its SMBus interface. Configuration data stored in the 256-byte user EEPROM can be rewritten dynamically using Analog Devices' GUI-based software or custom firmware. The sequencing engine accepts new state tables, transition conditions, and timing parameters over SMBus without requiring power cycle or hardware modification - enabling field updates for new board revisions or failure mode adaptations.