The ADM1066ASUZ 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 ADM1066ASUZ 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.
Feature
- 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 optionsDriven directly from 2.048 V (±0.25%) REFOUT pinMore accurate external reference for improved ADC performance
- Device powered by the highest of VPn, VH for improved redundancy
- 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
Applications
- Central office systems
- Servers/routers
- Multivoltage system line cards
- DSP/FPGA supply sequencing
- In-circuit testing of margined supplies
(Picture: Pinout)
