ADM1066 Series
Super Sequencer® with Margining Control and Auxiliary ADC Inputs
Manufacturer: Analog Devices
Catalog
Super Sequencer® with Margining Control and Auxiliary ADC Inputs
Key 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 ofSupplies up to 14.4 V on VHSupplies 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 VGeneral-purpose logic input
• Complete voltage-margining solution for 6 voltage rails
• 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
Description
AI
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.APPLICATIONSCentral office systemsServers/routersMultivoltage system line cardsDSP/FPGA supply sequencingIn-circuit testing of margined supplies
