ADM1066:  Super Sequencer® with Margining Control and Auxiliary ADC Inputs

The ADM1066 Super Sequencer® is a configurable supervisory/ sequencing device that offers a single-chip solution for supply monitoring and sequencing in multiple-supply systems. In addition to these ...More

ADM1066:  Super Sequencer® with Margining Control and Auxiliary ADC Inputs

Product Description

The ADM1066 Super Sequencer® is a configurable supervisory/ sequencing device that offers a single-chip solution for supply monitoring and sequencing in multiple-supply systems. In addition to these functions, the ADM1066 integrates a 12-bit ADC and six 8-bit voltage output DACs. These circuits can be used to implement a closed-loop margining system that enables supply adjustment by altering either the feedback node or 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 functionality at −5% of nominal supplies), or it can be used dynamically to accurately control the output voltage of a dc-to-dc converter.

Applications

  • Central office systems
  • Servers/routers
  • Multivoltage system line cards
  • DSP/FPGA supply sequencing
  • In-circuit testing of margined supplies

    • 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 up to 14.4 V on VH
      Supplies up to 6 V on VP1 to VP4 (VPn)
    • 5 dual-function inputs, VX1 to VX5 (VXn)
      High impedance input to supply fault detector with thresholds between 0.573 V and 1.375 V
      General-purpose logic input
    • Complete voltage-margining solution for 6 voltage rails

    10 programmable output drivers (PDO1 to PDO10)

    • Open collector with external pull-up
    • Push/pull output, driven to VDDCAP or VPn
    • Open collector with weak pull-up to VDDCAP or VPn
    • Internally charge-pumped high drive for use with external N-FET (PDO1 to PDO6 only)
    • 6 voltage output 8-bit DACs (0.300 V to 1.551 V) allow voltage adjustment via dc-to-dc converter trim/feedback node
    • 12-bit ADC for readback of all supervised voltages
    • 2 auxiliary (single-ended) ADC inputs
    • Reference input (REFIN) has 2 input options
      Driven directly from 2.048 V (±0.25%) REFOUT pin
      More accurate external reference for improved ADC performance
    • Device powered by the highest of VPn, VH for improved redundancy

    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

    Diagrams

    ADM1066 Diagram
    Functional Block Diagram for ADM1066

    Specifications

    # Supplies Monitored 12:Cascadeable
    # Output Drivers 10
    Programming Method SMBus
    FET Drive/Enable Output Both
    Package 40 ld LFCSP ,48 ld TQFP
    Voltage Readback 12-bit ADC
    Supply Adj/Margining 12-bit ADC+6 DACs
    Volt Monitoring Accuracy 1%

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    Part# # Supplies Monitored Volt Monitoring Accuracy # Output Drivers FET Drive/Enable Output Voltage Readback Supply Adj/Margining Programming Method Temp Sensor Package Price* (1000-4999)
    ADM1060 7 2.5% 9 Both - - SMBus - 28 ld TSSOP $6.58
    ADM1062 10 1% 10 Both 12-bit ADC 12-bit ADC+6 DACs SMBus 1 External, 1 Internal 40 ld LFCSP , 48 ld TQFP $7.59
    ADM1063 10 1% 10 Both 12-bit ADC - SMBus 1 Internal, 2 External 40 ld LFCSP , 48 ld TQFP $8.35
    ADM1064 10 1% 10 Both 12-bit ADC - SMBus - 40 ld LFCSP , 48 ld TQFP $7.84
    ADM1065 10 1% 10 Both - - SMBus - 40 ld LFCSP , 48 ld TQFP $5.82
    ADM1066 12 1% 10 Both 12-bit ADC 12-bit ADC+6 DACs SMBus - 40 ld LFCSP , 48 ld TQFP $8.60
    ADM1067 10 1% 10 Both - 6 DACs SMBus - 40 ld LFCSP , 48 ld TQFP $6.58
    ADM1068 8 1% 8 Both - - SMBus - 32 ld LQFP $4.05
    ADM1069 8 1% 8 Both 12-bit ADC 12-bit ADC+4 DACs SMBus - 32 ld LQFP $4.40
    ADM1085 Cascadeable 7% 1 Enable - - Analog - 6 ld SC70 $0.34
    ADM1086 Cascadeable 7% 1 Enable - - Analog - 6 ld SC70 $0.34
    ADM1087 Cascadeable 7% 1 Enable - - Analog - 6 ld SC70 $0.34
    ADM1088 Cascadeable 7% 1 Enable - - Analog - 6 ld SC70 -
    ADM1184 4 0.8% 4 Enable - - Analog - 10-Lead MSOP $2.42
    ADM1185 4 0.8% 4