ADM1260 datasheet(4/71 Pages) AD

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ADM1260

Data Sheet

Rev. 0 | Page 4 of 71

GENERAL DESCRIPTION

The ADM1260 Super Sequencer® is a configurable supervisory/

sequencing device that offers a single-chip solution for supply

monitoring and sequencing in multiple supply systems.

A high speed interchip bus (ICB) allows multiple devices to be

easily linked together. It is possible to create a system capable of

sequencing up to 40 supplies and monitoring up to 37 supplies.

Using the ADI Power Studio™ software, the operation of the ICB is

transparent to the user, making multiple devices appear to operate

as a single virtual sequencer.

In addition to these functions, the ADM1260 integrates a 12-bit

analog-to-digital converter (ADC) and six 8-bit voltage output

digital-to-analog converters (DACs). Use the ADC and the

DACs 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.

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 func-

tionality at −5% of nominal supplies), or it can be used dynamically

to accurately control the output voltage of a dc-to-dc converter.

The device also provides up to 10 programmable inputs for

monitoring 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 also provide an output of up to 12 V 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 (SE). This

state machine-based construction provides up to 61 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 can also be used to hold a

number of fault records that are written by the sequencing engine,

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

The device is controlled via configuration data that can be

programmed into an EEPROM. The entire configuration can

be programmed using an intuitive graphical user interface

(GUI)-based software package provided by Analog Devices, Inc.,

the ADI Power Studio software.

DETAILED FUNCTIONAL BLOCK DIAGRAM

GPI SIGNAL

CONDITIONING

SFD

GPI SIGNAL

CONDITIONING

SFD

SELECTABLE

ATTENUATOR

SELECTABLE

ATTENUATOR

DEVICE

CONTROLLER

OSC

EEPROM

SDA

CDA

CCL

SCL A1

SMBus

INTERFACE

12-BIT

SAR ADC

ADM1260

CONFIGURABLE

OUTPUT DRIVER

(HV)

PDO1

PDO2

PDOGND

PDO3

DAC1

VOUT

DAC

DAC6

VOUT

DAC

VCCP

GND

DAC2 DAC3 DAC4 DAC5

PDO4

PDO5

PDO8

PDO9

CONFIGURABLE

OUTPUT DRIVER

(HV)

PDO6

CONFIGURABLE

OUTPUT DRIVER

(LV)

PDO7

CONFIGURABLE

OUTPUT DRIVER

(LV)

PDO10

SEQUENCING

ENGINE

VX2

VX3

VX4

VP2

VP3

VP4

VP1

VX1

AGND

VX5

VDDCAP

VDD

ARBITRATOR

REGULATED

5.25V

CHARGE PUMP

FAULT

RECORDING

INTERCHIP

CASCADE BUS

REFGND

REFOUT

REFIN

VREF

Figure 2. Detailed Functional Block Diagram

ADM1260 Datasheet(PDF) 4 Page - Analog Devices

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