Super Sequencer and Monitor

ADM1065

Rev. D

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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 to

14.4 V on VH

6 V on VP1 to VP4 (VPx)

5 dual-function inputs, VX1 to VX5 (VXx)

High impedance input to supply fault detector with

thresholds between 0.573 V and 1.375 V

General-purpose logic input

10 programmable driver outputs, PDO1 to PDO10 (PDOx)

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

Device powered by the highest of VPx, VH for improved

redundancy

User EEPROM: 256 bytes

Industry-standard 2-wire bus interface (SMBus)

Guaranteed PDO low with VH, VPx = 1.2 V

Available in 40-lead, 6 mm × 6 mm LFCSP and

48-lead, 7 mm × 7 mm TQFP packages

APPLICATIONS

Central office systems

Servers/routers

Multivoltage system line cards

DSP/FPGA supply sequencing

In-circuit testing of margined supplies

For more information about the ADM1065 register map,

refer to the AN-698 Application Note at www.analog.com.

FUNCTIONAL BLOCK DIAGRAM

PDO7

PDO8

PDO9

PDO10

PDOGND

VDD

ARBITRATOR

VCCP

GND

VX1

VX2

VX3

VX4

VX5

VP1

VP2

VP3

VP4

VH

AGND

VDDCAP

PROGRAMMABLE

RESET

GENERATORS

(SFDs)

DUAL-

FUNCTION

INPUTS

(LOGIC INPUTS

OR

SFDs)

SEQUENCING

ENGINE

CONFIGURABLE

OUTPUT

DRIVERS

(LV CAPABLE

OF DRIVING

LOGIC SIGNALS)

PDO1

PDO2

PDO3

PDO4

PDO5

PDO6

SDA SCL

A1

A0

SMBus

INTERFACE

REFOUT REFGND

VREF

EEPROM

ADM1065

CONFIGURABLE

OUTPUT

DRIVERS

(HV CAPABLE OF

DRIVING GATES

OF N-FET)

Figure 1.

GENERAL DESCRIPTION

The ADM1065 Super Sequencer® is a configurable supervisory/

sequencing device that offers a single-chip solution for supply

monitoring and sequencing in multiple-supply systems.

The device also provides up to 10 programmable inputs for moni-

toring undervoltage faults, overvoltage faults, or out-of-window

faults on up to 10 supplies. In addition, 10 programmable outputs

can be used as logic enables. Six of these programmable outputs

can each provide up to a 12 V output for driving the gate of an

N-FET that can be placed in the path of a supply.

The logical core of the device is a sequencing engine. This state

machine-based construction provides up to 63 different states.

This design enables very flexible sequencing of the outputs

based on the condition of the inputs.

The ADM1065 is controlled via configuration data that can be

programmed into an EEPROM. The whole configuration can

be programmed using an intuitive GUI-based software package

provided by Analog Devices, Inc.