ADM1066ASU

Supervisors Overview

The ADM1066ASU is a configurable supervisory and sequencing device designed for multi-supply systems. It integrates ten supply fault detectors, a 12-bit ADC, and six 8-bit voltage output DACs to enable closed-loop margining control. The device supports monitoring up to ten supplies with selectable input attenuators allowing supervision of voltages up to 14.4 V on the VH pin and 6 V on VP pins. It features ten programmable driver outputs (PDOs) with open-collector or push-pull configurations, including internally charge-pumped high drive capabilities for external N-FETs. A built-in sequencing engine implements state machine control, while an integrated watchdog timer and SMBus interface provide comprehensive system management.

Supervisors Feature Summary

• Integrates a 12-bit ADC and six 8-bit DACs to implement closed-loop voltage margining by adjusting DC-to-DC converter feedback nodes or references.
• Features a dedicated sequencing engine that controls ten programmable driver outputs via a state machine based on input events and power-up/down sequences.
• Provides ten supply fault detectors with five selectable input attenuators, enabling accurate supervision of multiple voltage rails up to 14.4 V.
• Supports software-controlled sequencing through an SMBus interface and includes interrupt generation on warnings alongside an integrated watchdog function.

Supervisors Applications

• Multi-supply server and storage system power sequencing
• Closed-loop voltage margining for DC-to-DC converters
• Complex board power-up and power-down sequence control
• System monitoring in industrial equipment requiring multiple voltage rails

Supervisors Procurement Notes

Verify component authenticity as this part may be subject to obsolescence notices. Confirm package type TQFP-48 and operating temperature range -40°C to +85°C against design requirements. Check for specific suffix variations such as REEL7 which indicates tape and reel packaging. Ensure compatibility with existing SMBus interfaces and validate that the 14.4 V maximum supply voltage aligns with system specifications before procurement.

Supervisors Selection Notes

Select this component when a single-chip solution is required for supervising and sequencing multiple power supplies simultaneously. It is suitable for designs needing precise voltage margining capabilities without external microcontrollers for basic sequencing logic. Consider the availability of ten programmable outputs and the integrated ADC/DAC combination if complex fault handling and analog adjustments are necessary within the power management architecture.

Supervisors Part Context

The ADM1066 belongs to Analog Devices' Super Sequencer family, offering integrated monitoring and sequencing for complex power architectures. It consolidates functions typically requiring separate supervisor ICs, sequencers, and ADC/DAC components into one package. This integration reduces board space and simplifies design complexity for applications managing numerous voltage rails with strict timing and accuracy requirements.

Supervisors Replacement Considerations

Direct substitutes include the ADM1066ACPZ variant, which utilizes a different LFCSP EP package but maintains identical electrical functionality. Verify pinout compatibility and thermal performance differences between the TQFP-48 and alternative packages during replacement planning.