ADM1168 データシートの表示（PDF） - Analog Devices

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ADM1168

Super Sequencer and Monitor with Nonvolatile Fault Recording

Analog Devices 

Data Sheet

Super Sequencer and Monitor with

Nonvolatile Fault Recording

ADM1168

FEATURES

Complete supervisory and sequencing solution for up to

8 supplies

16 event deep black box nonvolatile fault recording

8 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

4 selectable input attenuators allow supervision of supplies to

14.4 V on VH

6 V on VP1 to VP3 (VPx)

4 dual-function inputs, VX1 to VX4 (VXx)

High impedance input to supply fault detector with

thresholds between 0.573 V and 1.375 V

General-purpose logic input

8 programmable driver outputs, PDO1 to PDO8 (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

NFET (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 32-lead, 7 mm × 7 mm LQFP

APPLICATIONS

Central office systems

Servers/routers

Multivoltage system line cards

DSP/FPGA supply sequencing

In-circuit testing of margined supplies

Rev. B

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responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other

rights of third parties that may result from its use. Specifications subject to change without notice. No

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FUNCTIONAL BLOCK DIAGRAM

REFOUT REFGND SDA SCL A1 A0

ADM1168

VREF

SMBus

INTERFACE

FAULT RECORDING EEPROM

VX1

VX2

VX3

VX4

VP1

VP2

VP3

VH

AGND

VDDCAP

DUAL-

FUNCTION

INPUTS

(LOGIC INPUTS

OR

SFDs)

PROGRAMMABLE

RESET

GENERATORS

(SFDs)

SEQUENCING

ENGINE

CONFIGURABLE

OUTPUT

DRIVERS

(HV CAPABLE OF

DRIVING GATES

OF NFET)

CONFIGURABLE

OUTPUT

DRIVERS

(LV CAPABLE

OF DRIVING

LOGIC SIGNALS)

VDD

ARBITRATOR

PDO1

PDO2

PDO3

PDO4

PDO5

PDO6

PDO7

PDO8

PDOGND

VCCP GND

Figure 1.

GENERAL DESCRIPTION

The ADM1168 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 eight programmable inputs

for monitoring undervoltage faults, overvoltage faults, or

out-of-window faults on up to eight supplies. In addition, eight

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

programmable outputs can also provide up to a 12 V output for

driving the gate of an NFET 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.

A block of nonvolatile EEPROM is available that can be used to

store user-defined information and may also be used to hold a

number of fault records that are written by the sequencing engine

defined by the user when a particular fault or sequence occurs.

The ADM1168 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.

For more information about the ADM1168 register map, refer

to the AN-721 Application Note.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781.329.4700 ©2011–2015 Analog Devices, Inc. All rights reserved.

Technical Support

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