ADM1066

PRODUCTION

Super Sequencer® with Margining Control and Auxiliary ADC Inputs

Analog Devices ADM1066 Product Info

10 February 2026 5

Features

Complete supervisory and sequencing solution for up to 10 supplies
10 supply fault detectors enable supervision of supplies to <0.5% accuracy at all voltages at 25°C
<1.0 % accuracy across all voltages and temperatures
5 selectable input attenuators allow supervision of
Supplies up to 14.4 V on VH
Supplies up to 6 V on VP1 to VP4 (VPn)
5 dual-function inputs, VX1 to VX5 (VXn)
High impedance input to supply fault detector with thresholds between 0.573 V and 1.375 V
General-purpose logic input
Complete voltage-margining solution for 6 voltage rails

10 Programmable Output Drivers (PDO1 To PDO10)

Open collector with external pull-up
Push/pull output, driven to VDDCAP or VPn
Open collector with weak pull-up to VDDCAP or VPn
Internally charge-pumped high drive for use with external N-FET (PDO1 to PDO6 only)

6 voltage output 8-bit DACs (0.300 V to 1.551 V) allow voltage adjustment via dc-to-dc converter trim/feedback node
12-bit ADC for readback of all supervised voltages
2 auxiliary (single-ended) ADC inputs
Reference input (REFIN) has 2 input options
Driven directly from 2.048 V (±0.25%) REFOUT pin
More accurate external reference for improved ADC performance
Device powered by the highest of VPn, VH for improved redundancy

Sequencing Engine (SE) Implements State Machine Control Of PDO Outputs

State changes conditional on input events
Enables complex control of boar

Part details & applications

The ADM1066 Super Sequencer^® is a configurable supervisory/ sequencing device that offers a single-chip solution for supply monitoring and sequencing in multiple-supply systems. In addition to these functions, the ADM1066 integrates a 12-bit ADC and six 8-bit voltage output DACs. These circuits can be used to implement a closed-loop margining system that enables supply adjustment by altering either the feedback node or reference of a dc-to-dc converter using the DAC outputs.

Supply margining can be performed with a minimum of external components. The margining loop can be used for in-circuit testing of a board during production (for example, to verify board functionality at −5% of nominal supplies), or it can be used dynamically to accurately control the output voltage of a dc-to-dc converter.

APPLICATIONS

Central office systems
Servers/routers
Multivoltage system line cards
DSP/FPGA supply sequencing
In-circuit testing of margined supplies

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