Super Sequencer with Margining Control Data Sheet ADM1069 FEATURES FUNCTIONAL BLOCK DIAGRAM REFIN REFOUT REFGND SDA SCL A1 A0 Complete supervisory and sequencing solution for up to 8 supplies ADM1069 VREF SMBus 8 supply fault detectors enable supervision of supplies to INTERFACE <0.5% accuracy at all voltages at 25C 12-BIT SAR ADC <1.0% accuracy across all voltages and temperatures EEPROM 4 selectable input attenuators allow supervision of supplies to CLOSED-LOOP MARGINING SYSTEM 14.4 V on VH PDO1 CONFIGURABLE 6 V on VP1 to VP3 (VPx) DUAL- PDO2 OUTPUT VX1 FUNCTION DRIVERS INPUTS 4 dual-function inputs, VX1 to VX4 (VXx) PDO3 VX2 PDO4 (LOGIC INPUTS (HV CAPABLE OF High impedance input to supply fault detector with VX3 OR PDO5 DRIVING GATES SFDs) OF N-FET) VX4 PDO6 thresholds between 0.573 V and 1.375 V SEQUENCING ENGINE General-purpose logic input VP1 CONFIGURABLE 8 programmable driver outputs, PDO1 to PDO8 (PDOx) OUTPUT PROGRAMMABLE VP2 DRIVERS RESET PDO7 GENERATORS Open-collector with external pull-up VP3 (LV CAPABLE PDO8 OF DRIVING (SFDs) VH Push/pull output, driven to VDDCAP or VPx LOGIC SIGNALS) Open-collector with weak pull-up to VDDCAP or VPx AGND PDOGND Internally charge-pumped high drive for use with external VDD V V V V OUT OUT OUT OUT VDDCAP ARBITRATOR DAC DAC DAC DAC N-FET (PDO1 to PDO6 only) Sequencing engine (SE) implements state machine control of PDO outputs DAC1 DAC2 DAC3 DAC4 VCCP GND Figure 1. State changes conditional on input events Enables complex control of boards APPLICATIONS Power-up and power-down sequence control Central office systems Fault event handling Servers/routers Interrupt generation on warnings Multivoltage system line cards Watchdog function can be integrated in SE DSP/FPGA supply sequencing Program software control of sequencing through SMBus In-circuit testing of margined supplies Complete voltage margining solution for 4 voltage rails 4 voltage output 8-bit DACs (0.300 V to 1.551 V) allow voltage GENERAL DESCRIPTION adjustment via dc-to-dc converter trim/feedback node The ADM1069 Super Sequencer is a configurable supervisory/ 12-bit ADC for readback of all supervised voltages sequencing device that offers a single-chip solution for supply Reference input (REFIN) has 2 input options monitoring and sequencing in multiple supply systems. In addition Driven directly from 2.048 V (0.25%) REFOUT pin to these functions, the ADM1069 integrates a 12-bit analog-to- More accurate external reference for improved ADC digital converter (ADC) and four 8-bit voltage output digital-to- performance analog converters (DACs). These circuits can implement a closed- Device powered by the highest of VPx, VH for improved loop margining system that enables supply adjustment by altering redundancy either the feedback node or reference of a dc-to-dc converter User EEPROM: 256 bytes using the DAC outputs. Industry-standard 2-wire bus interface (SMBus) For more information about the ADM1069 register map, refer Guaranteed PDO low with VH, VPx = 1.2 V to the AN-721 Application Note. Available in 32-lead, 7 mm 7 mm LQFP and 40-lead, 6 mm 6 mm LFCSP packages Rev. E Document Feedback Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. rights of third parties that may result from its use. Specifications subject to change without notice. No Tel: 781.329.4700 20052016 Analog Devices, Inc. All rights reserved. license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Technical Support www.analog.com Trademarks and registered trademarks are the property of their respective owners. MUX 04735-001ADM1069 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 SMBus Jump (Unconditional Jump) ........................................ 20 Functional Block Diagram .............................................................. 1 Sequencing Engine Application Example ............................... 21 Applications ....................................................................................... 1 Fault and Status Reporting ........................................................ 22 General Description ......................................................................... 1 Voltage Readback............................................................................ 23 Revision History ............................................................................... 3 Supply Supervision with the ADC ........................................... 23 Detailed Block Diagram .................................................................. 4 Supply Margining ........................................................................... 24 Specifications ..................................................................................... 5 Overview ..................................................................................... 24 Absolute Maximum Ratings ............................................................ 8 Open-Loop Supply Margining ................................................. 24 Thermal Resistance ...................................................................... 8 Closed-Loop Supply Margining ............................................... 24 ESD Caution .................................................................................. 8 Writing to the DACs .................................................................. 25 Pin Configurations and Function Descriptions ........................... 9 Choosing the Size of the Attenuation Resistor ....................... 25 Typical Performance Characteristics ........................................... 11 DAC Limiting and Other Safety Features ............................... 25 Powering the ADM1069 ................................................................ 14 Applications Diagram .................................................................... 26 Slew Rate Consideration ............................................................ 14 Communicating with the ADM1069 ........................................... 27 Inputs ................................................................................................ 15 Configuration Download at Power-Up ................................... 27 Supply Supervision ..................................................................... 15 Updating the Configuration ..................................................... 27 Programming the Supply Fault Detectors ............................... 15 Updating the Sequencing Engine ............................................. 28 Input Comparator Hysteresis .................................................... 15 Internal Registers ........................................................................ 28 Input Glitch Filtering ................................................................. 16 EEPROM ..................................................................................... 28 Supply Supervision with VXx Inputs ....................................... 16 Serial Bus Interface..................................................................... 28 VXx Pins as Digital Inputs ........................................................ 17 SMBus Protocols for RAM and EEPROM .............................. 31 Outputs ............................................................................................ 18 Write Operations ........................................................................ 31 Supply Sequencing Through Configurable Output Drivers . 18 Read Operations ......................................................................... 33 Default Output Configuration .................................................. 18 Outline Dimensions ....................................................................... 34 Sequencing Engine ......................................................................... 20 Ordering Guide .......................................................................... 34 Overview ...................................................................................... 20 Warnings ...................................................................................... 20 Rev. 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