Super Sequencer® with Margining Control and Auxiliary ADC Inputs

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

* 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