Super Sequencer with Margining Control and Temperature Monitoring

The ADM1062 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 ADM1062 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 the reference of a dc-to-dc converter using the DAC outputs.

For more information about the ADM1062 register map, refer to the AN-698 Application Note.

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)

* 10 programmable output drivers (PDO1 to PDO10):

Open collector with external pull-up

Push/pull output, driven to VDDCAP or VPx

Open collector with weak pull-up to VDDCAP or VPx

Internally charge-pumped high drive for use with external N-FET (PDO1 to PDO6 only)

* Sequencing engine (SE) implements state machine control of PDO outputs

State changes conditional on input events

Enables complex control of boards

Power-up and power-down sequence control

Fault event handling

Interrupt generation on warnings

Watchdog function can be integrated in SE

Program software control of sequencing

through SMBus