Cascadable Super Sequencer with Margin Control and Fault Recording

The ADM1266 Super Sequencer® is a configurable supervisory/sequencing device that offers a single-chip solution for supply monitoring and sequencing in systems with up to 17 supplies. For systems with more supplies (up to 257), the operation of up to 16 ADM1266 devices can be synchronized through a proprietary 2-wire interface (interdevice bus).

The sequencing engine (SE) monitors the supply fault detectors (SFDs), programmable driver input/outputs (PDIOs), general-purpose inputs/outputs (GPIOs), and timers, and controls the PDIOs and GPIOs to sequence the supplies up and down as required. The logical core of the device is an ARM® Cortex-M3 microcontroller. The firmware is supplied by Analog Devices, Inc., and all configuration is performed through an intuitive graphic user interface (GUI).

Additionally, the ADM1266 integrates an analog-to-digital converter (ADC) and voltage output digital-to-analog converters (DACs) that can be used to adjust either the feedback node or reference of a dc-to-dc converter to implement a closed-loop, autonomous, margining system.

A block of nonvolatile EEPROM is available to record voltage, time, and fault information when instructed to by the sequencing engine configuration.

APPLICATIONS

* Communications infrastructure

* Industrial test and measurement

* Complete supervisory and sequencing solution for up to 17 supplies

* Expandable to 257 supplies with additional ADM1266 ICs connected to the 2-wire interdevice bus

* Fully programmable sequencing engine

* 17 supply fault detectors enable real time supervision of supplies

* 0.4 V to 15 V on VH1 to VH4 (VHx)

* 0.4 V to 5 V on VP1 to VP13 (VPx)

* Device powered by the higher of VH1 and VH2 inputs for improved operating redundancy