Analog Devices Inc. ADM1169ASTZ

Overview

ADM1169ASTZ from Analog Devices is a configurable supervisory and sequencing IC for multivoltage systems, integrating 8-channel supply fault detection (±1% accuracy), 12-bit ADC voltage readback, four 8-bit DACs for closed-loop margining (0.300 V–1.551 V output), programmable state-machine sequencing engine, and 16-event nonvolatile fault recording. It enables precise power-up/down control and in-circuit testing of DSP/FPGA rails.

For engineers reviewing the ADM1169ASTZ datasheet, ADM1169ASTZ pinout, ADM1169ASTZ application, or ADM1169ASTZ equivalent, key selection considerations include its dual-function VXx inputs (analog SFD or digital logic), charge-pumped high-voltage PDO outputs (up to 14 V), SMBus-programmable sequencing, and support for 32-lead LQFP and 40-lead LFCSP packages.

Technical Context

The ADM1169ASTZ implements a state-machine-based Sequencing Engine (SE) with up to 63 programmable states, enabling conditional output transitions based on input events (e.g., supply OK, fault, watchdog timeout). Its supply arbitration selects VDDCAP from the highest of VH (up to 14.4 V) or VPx (up to 6.0 V), ensuring operational redundancy across backplane and core rail failures.

It integrates a closed-loop margining system: four buffered 8-bit DACs inject trim signals into dc-dc converter feedback nodes, while the 12-bit SAR ADC (±2.5 LSB INL, 0.44 ms conversion) reads back all supervised voltages (VH, VPx, VXx) with selectable attenuation ranges - supporting ±0.5% supervision at 25°C and <1.0% across −40°C to +85°C.

Key Specifications

Pinout & Package

ADM1169ASTZ is available in a 32-lead LQFP package (7 mm × 7 mm, 0.8 mm pitch) with exposed thermal pad (not connected). Pin functions are validated per Analog Devices Rev. B datasheet Figures 3 and Table 4.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADM1166ASTZ and TPS40400RHLR, the ADM1169ASTZ uniquely combines 8-channel supervision, on-chip 12-bit ADC readback, four margining DACs, and 16-event black-box logging in a single package - eliminating external components needed for closed-loop test and field-failure diagnostics.

Availability

ADM1169ASTZ is available at Aetrix Electronics and suitable for server power sequencing, DSP/FPGA board supervision, central office line card control, and in-circuit production test systems requiring stable component supply and long-term lifecycle support.

Supply support for ADM1169ASTZ 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 semiconductor leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision measurement and control applications.

The ADM1169ASTZ belongs to Analog Devices' Super Sequencer® family, designed specifically for complex multivoltage system power management - targeting high-reliability infrastructure equipment where sequencing fidelity, fault visibility, and production test efficiency are critical.

FAQ

What is the primary function of the ADM1169ASTZ in a multivoltage system?

The ADM1169ASTZ serves as a complete supervisory and sequencing controller, providing 8-channel supply fault detection, programmable power-up/down sequencing via its state-machine Sequencing Engine, closed-loop voltage margining using four 8-bit DACs and a 12-bit ADC, and nonvolatile 16-event fault logging. It replaces discrete supervisors, timers, and margining circuitry in systems like servers and FPGA boards.

Does the ADM1169ASTZ support both high-voltage and low-voltage programmable outputs?

Yes, the ADM1169ASTZ features eight programmable driver outputs (PDO1–PDO8). PDO1–PDO6 support three modes: charge-pumped high-voltage drive (up to 14 V for NFET gates), push-pull to VDDCAP or VPx, or open-collector with weak pull-up. PDO7–PDO8 operate in low-voltage push-pull or open-collector modes only - confirmed in the Rev. B datasheet Section "Programmable Driver Outputs".

How does the ADM1169ASTZ achieve supply redundancy for its own operation?

The ADM1169ASTZ implements internal power arbitration that selects VDDCAP from the highest valid input among VH (up to 14.4 V) and VP1–VP3 (up to 6.0 V). This OR-ing architecture ensures uninterrupted operation during single-rail failure or brownout, with minimal dropout (~0.2 V) and automatic handover - detailed in the "Powering the ADM1169" section of the datasheet.

Can the ADM1169ASTZ perform in-circuit voltage margining without external components?

Yes, the ADM1169ASTZ integrates four 8-bit voltage-output DACs (0.300 V–1.551 V) and a 12-bit SAR ADC to form a self-contained closed-loop margining system. It drives dc-dc converter trim/feedback nodes directly and reads back actual rail voltages - enabling production test at ±5% tolerance with no external DACs, ADCs, or controllers required.

What package options are available for the ADM1169ASTZ and how do they differ electrically?

The ADM1169ASTZ is offered in two packages: 32-lead LQFP (7 mm × 7 mm) and 40-lead LFCSP (6 mm × 6 mm). Both share identical pin functions and electrical specifications. The LFCSP offers lower thermal resistance (θJA = 26.5°C/W vs. 54°C/W for LQFP), making it preferable for high-power-density designs, while the LQFP provides easier manual assembly and probe access - per Table 3 and Figures 3–4 of the datasheet.