Super Sequencer with Margining Control and Auxiliary ADC Inputs Data Sheet ADM1066 FEATURES FUNCTIONAL BLOCK DIAGRAM AUX1 AUX2 REFIN REFOUT REFGND SDA SCL A1 A0 Complete supervisory and sequencing solution for up to 10 supplies ADM1066 VREF SMBus INTERFACE 10 supply fault detectors enable supervision of supplies to <0.5% accuracy at all voltages at 25C 12-BIT <1.0% accuracy across all voltages and temperatures SAR ADC EEPROM 5 selectable input attenuators allow supervision of supplies to CLOSED-LOOP MARGINING SYSTEM 14.4 V on VH VX1 PDO1 CONFIGURABLE DUAL- 6 V on VP1 to VP4 (VPx) OUTPUT PDO2 VX2 FUNCTION DRIVERS INPUTS PDO3 5 dual-function inputs, VX1 to VX5 (VXx) VX3 PDO4 (LOGIC INPUTS (HV CAPABLE OF VX4 High impedance input to supply fault detector with OR DRIVING GATES PDO5 SFDs) OF N-FET) VX5 PDO6 thresholds between 0.573 V and 1.375 V SEQUENCING ENGINE General-purpose logic input VP1 PDO7 CONFIGURABLE OUTPUT PROGRAMMABLE 10 programmable driver outputs, PDO1 to PDO10 (PDOx) VP2 DRIVERS RESET PDO8 GENERATORS VP3 Open-collector with external pull-up (LV CAPABLE PDO9 (SFDs) OF DRIVING VP4 LOGIC SIGNALS) Push/pull output, driven to VDDCAP or VPx VH PDO10 Open collector with weak pull-up to VDDCAP or VPx AGND PDOGND VDD Internally charge-pumped high drive for use with external V V V V V V OUT OUT OUT OUT OUT OUT VDDCAP ARBITRATOR DAC DAC DAC DAC DAC DAC N-FET (PDO1 to PDO6 only) Sequencing engine (SE) implements state machine control of DAC1 DAC2 DAC3 DAC4 DAC5 DAC6 VCCP GND PDO outputs 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 6 voltage rails GENERAL DESCRIPTION 6 voltage output 8-bit DACs (0.300 V to 1.551 V) allow voltage adjustment via dc-to-dc converter trim/feedback node The ADM1066 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 2 auxiliary (single-ended) ADC inputs monitoring and sequencing in multiple-supply systems. In addition Reference input (REFIN) has 2 input options to these functions, the ADM1066 integrates a 12-bit ADC and Driven directly from 2.048 V (0.25%) REFOUT pin six 8-bit voltage output DACs. These circuits can be used to More accurate external reference for improved ADC implement a closed-loop margining system that enables supply performance adjustment by altering either the feedback node or reference of Device powered by the highest of VPx, VH for improved a dc-to-dc converter using the DAC outputs. redundancy Supply margining can be performed with a minimum of external User EEPROM: 256 bytes components. The margining loop can be used for in-circuit testing Industry-standard 2-wire bus interface (SMBus) of a board during production (for example, to verify board func- Guaranteed PDO low with VH, VPx = 1.2 V tionality at 5% of nominal supplies), or it can be used dynamically Available in 40-lead, 6 mm 6 mm LFCSP and to accurately control the output voltage of a dc-to-dc converter. 48-lead, 7 mm 7 mm TQFP packages For more information about the ADM1066 register map, refer to the AN-698 Application Note. Rev. F 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 20042015 Analog Devices, Inc. All rights reserved. license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners. Technical Support www.analog.com MUX 04609-001ADM1066 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Warnings...................................................................................... 19 Functional Block Diagram .............................................................. 1 SMBus Jump (Unconditional Jump) ........................................ 19 Applications ....................................................................................... 1 Sequencing Engine Application Example ............................... 20 General Description ......................................................................... 1 Fault and Status Reporting ........................................................ 21 Revision History ............................................................................... 3 Voltage Readback............................................................................ 22 Detailed Block Diagram .................................................................. 4 Supply Supervision with the ADC ........................................... 22 Specifications ..................................................................................... 5 Supply Margining ........................................................................... 23 Absolute Maximum Ratings ............................................................ 8 Overview ..................................................................................... 23 Thermal Resistance ...................................................................... 8 Open-Loop Supply Margining ................................................. 23 ESD Caution .................................................................................. 8 Closed-Loop Supply Margining ............................................... 23 Pin Configurations and Function Descriptions ........................... 9 Writing to the DACs .................................................................. 24 Typical Performance Characteristics ........................................... 11 Choosing the Size of the Attenuation Resistor ....................... 24 Powering the ADM1066 ................................................................ 14 DAC Limiting and Other Safety Features ............................... 24 Slew Rate Consideration ............................................................ 14 Applications Diagram .................................................................... 25 Inputs ................................................................................................ 15 Communicating with the ADM1066 ........................................... 26 Supply Supervision ..................................................................... 15 Configuration Download at Power-Up ................................... 26 Programming the Supply Fault Detectors ............................... 15 Updating the Configuration ..................................................... 26 Input Comparator Hysteresis .................................................... 15 Updating the Sequencing Engine ............................................. 27 Input Glitch Filtering ................................................................. 16 Internal Registers ........................................................................ 27 Supply Supervision with VXx Inputs ....................................... 16 EEPROM ..................................................................................... 27 VXx Pins as Digital Inputs ........................................................ 17 Serial Bus Interface..................................................................... 27 Outputs ............................................................................................ 18 SMBus Protocols for RAM and EEPROM .............................. 29 Supply Sequencing Through Configurable Output Drivers . 18 Write Operations ........................................................................ 29 Default Output Configuration .................................................. 18 Read Operations ......................................................................... 31 Sequencing Engine ......................................................................... 19 Outline Dimensions ....................................................................... 33 Overview ...................................................................................... 19 Ordering Guide .......................................................................... 33 Rev. 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