GENERAL DESCRIPTION
The ADM1066 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, which enables supply adjustment by altering either the feedback node or reference of a dc/dc converter using the DAC outputs.

FEATURES
   Complete supervisory and sequencing solution for up to
      10 supplies
   10 supply fault detectors enable supervision of supplies to
      better than 1% accuracy
   5 selectable input attenuators allow supervision:
      Supplies up to 14.4 V on VH
      Supplies up to 6 V on VP1–4
   5 dual-function inputs, VX1–5:
      High impedance input to supply fault detector with
         thresholds between 0.573 V and 1.375 V
      General-purpose logic input
   10 programmable output drivers (PDO1–10):
      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 (PDO1–6 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
   Complete voltage margining solution for 6 voltage rails
   6 voltage output 8-bit DACs (0.300 V to 1.551 V) allow
      voltage adjustment via dc/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 2.048V (±0.25%) REFOUT pin
      More accurate external reference for improved ADC
         performance
   Device powered by the highest of VP1–4, VH for improved
   redundancy
   User EEPROM: 256 bytes
   Industry-standard 2-wire bus interface (SMBus)
   Guaranteed PDO low with VH, VPn = 1.2 V
   40-lead 6 mm × 6 mm LFCSP and
      48-lead 7 mm × 7 mm TQFP packages

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