Analog Devices Inc. ADM1260ACPZ

Overview

ADM1260ACPZ from Analog Devices is a configurable supervisory and sequencing IC for multivoltage systems, integrating 10 supply fault detectors (<1.0% accuracy across temperature), a 12-bit SAR ADC, six 8-bit DACs for closed-loop voltage margining, and a state-machine-based sequencing engine supporting up to 61 states. It enables precise power-up/down sequencing and fault handling in server line cards and FPGA/DSP power domains.

For engineers reviewing the ADM1260ACPZ datasheet, ADM1260ACPZ pinout, ADM1260ACPZ application, or ADM1260ACPZ equivalent, key selection considerations include interchip bus (ICB) scalability to 4 devices, nonvolatile black box fault recording (16-event depth), programmable driver outputs with HV charge-pump capability (up to 14 V), and SMBus-configurable sequencing logic.

Technical Context

The ADM1260ACPZ implements a deterministic state-machine sequencing engine (SE) with conditional transitions triggered by input events (e.g., supply OK, fault, timeout), enabling complex power-up/down and fault-response sequences without host intervention. Its ICB interface supports daisy-chained arbitration among up to four devices, synchronizing sequencing across multiple rails while maintaining independent configuration storage in on-chip EEPROM.

Supervision combines analog comparators with selectable input attenuators (for VH: 6–14.4 V; VPx: 1.25–6.0 V; VXx: 0.573–1.375 V) and digital glitch filtering (100 μs max). Margining uses six DACs (0.300–1.552 V output range) to adjust dc-dc converter feedback nodes, with ADC readback (12-bit, 0.44 ms/conversion) closing the loop for in-circuit testing or dynamic voltage control.

Key Specifications

Pinout & Package

ADM1260ACPZ is housed in a 40-lead, 6 mm × 6 mm LFCSP package with exposed pad (NC, recommended soldered for mechanical stability). Power is derived internally from the highest active VPx or VH rail, regulated to VDDCAP (4.75 V typical).

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADM1266ACPZ, ADM1260ACPZ offers identical sequencing architecture and ICB compatibility but trades expanded GPIO and EEPROM for lower cost and smaller footprint; versus TPS659122ZQWR, ADM1260ACPZ delivers superior fault visibility, nonvolatile diagnostics, and dedicated margining capability-critical for high-reliability infrastructure.

Availability

ADM1260ACPZ is available at Aetrix Electronics and suitable for server/routers, DSP/FPGA supply sequencing, multivoltage line cards, central office systems, and in-circuit voltage margining applications requiring stable component supply and long-term lifecycle support.

Supply support for ADM1260ACPZ 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 ADM1260ACPZ belongs to Analog Devices' Super Sequencer® family, designed specifically for high-reliability, multirail power management in datacenter, telecom, and industrial infrastructure where deterministic sequencing, fault diagnostics, and voltage margining are critical.

FAQ

What is the primary function of the ADM1260ACPZ in a power system?

The ADM1260ACPZ serves as a configurable supervisory and sequencing controller that monitors up to 10 voltage rails, executes programmable power-up/down sequences via its 61-state sequencing engine, records faults in nonvolatile EEPROM, and performs closed-loop voltage margining using integrated 12-bit ADC and six 8-bit DACs. Its role is to ensure reliable, repeatable, and diagnosable power delivery in complex multivoltage systems like servers and FPGA platforms.

How does the ADM1260ACPZ achieve power redundancy and supply arbitration?

The ADM1260ACPZ achieves power redundancy by deriving its internal VDDCAP supply from the highest active voltage among VP1–VP4 or VH pins-automatically selecting the best available rail with ~0.2 V dropout. This arbitration ensures continuous operation even if one supply fails, and eliminates dependency on a single dedicated bias rail. The ADM1260ACPZ remains functional as long as at least one VPx or VH input is ≥3.0 V.

Can the ADM1260ACPZ drive external N-channel MOSFETs directly, and which pins support this?

Yes, the ADM1260ACPZ can directly drive external N-channel MOSFET gates using its charge-pumped high-voltage driver outputs. Pins PDO1 through PDO6 support HV mode, delivering up to 14 V (at 0 μA load) and sustaining ≥10.5 V at 1 μA sink current. These outputs eliminate the need for external level-shifters or gate drivers in high-side switch configurations for rail enable or hot-swap control.

What interfaces does the ADM1260ACPZ use for configuration and inter-device communication?

The ADM1260ACPZ uses two distinct interfaces: an SMBus (2-wire) interface (SDA/SCL pins) for configuration download, register access, and real-time monitoring; and a dedicated interchip bus (ICB) interface (CDA/CCL pins) for daisy-chained synchronization among up to four ADM1260ACPZ devices. ICB handles event propagation, fault sharing, and coordinated sequencing without host involvement, while SMBus retains full configurability per device.

Does the ADM1260ACPZ support voltage margining, and how is it implemented?

Yes, the ADM1260ACPZ supports both open-loop and closed-loop voltage margining. It implements closed-loop margining using six 8-bit DACs (0.300–1.552 V output) to inject precise offsets into dc-dc converter feedback nodes, combined with its 12-bit ADC to measure actual rail voltage. This enables automated in-circuit testing at ±5% margins or dynamic voltage tuning during operation-all without external components beyond standard decoupling capacitors.