GENERAL DESCRIPTION
●The ADM1166 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 ADM1166 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.
●FEATURES
● Complete supervisory and sequencing solution for up to 10 supplies
● 16 event deep black box nonvolatile fault recording
● 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 to
● 14.4 V on VH
● 6 V on VP1 to VP4 (VPx)
● 5 dual-function inputs, VX1 to VX5 (VXx)
● High impedance input to supply fault detector with thresholds between 0.573 V and 1.375 V
● General-purpose logic input
● 10 programmable driver outputs, PDO1 to PDO10 (PDOx)
● Open-collector with external pull-up
● Push/pull output, driven to VDDCAP or VPx
● Open collector with weak pull-up to VDDCAP or VPx
● Internally charge-pumped high drive for use with external N-FET (PDO1 to PDO6 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-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 VPx, VH for improved redundancy
● User EEPROM: 256 bytes
● Industry-standard 2-wire bus interface (SMBus)
● Guaranteed PDO low with VH, VPx = 1.2 V
● Available in 40-lead, 6 mm × 6 mm LFCSP and 48-lead, 7 mm × 7 mm TQFP packages
● For more information about the ADM1166 register map, refer to the AN-698 Application Note
●APPLICATIONS
● Central office systems
● Servers/routers
● Multivoltage system line cards
● DSP/FPGA supply sequencing
● In-circuit testing of margined supplies
