Lowest Phase Noise PLL Synthesizer Using Fractional-N Technology

The ADM1066 is a configurable supervisory and sequencing device that provides a single-chip solution for supply monitoring and sequencing in systems with multiple power supplies. In addition to these capabilities, the ADM1066 features a 12-bit ADC and six 8-bit voltage output DACs. These components can be utilized to create a closed-loop margining system, allowing for supply adjustments by modifying either the feedback node or the reference of a DC-DC converter through the DAC outputs. Supply margining can be achieved with minimal external components. The margining loop is useful for in-circuit testing during production, such as verifying board functionality at -5% of nominal supplies, or it can be employed dynamically to precisely control the output voltage of a DC-DC converter. The device supports up to 10 programmable inputs to monitor under, over, or out-of-window faults across 10 power supplies. Additionally, it offers 10 programmable outputs that can function as logic enables. Six of these programmable outputs can also deliver up to 12 V to drive the gate of an N-channel FET positioned in the supply path. Control of the device is accomplished via configuration data that can be programmed into an EEPROM. The entire configuration process can be managed using an intuitive GUI-based software package provided by Analog Devices, Inc.

The ADM1066 is designed to enhance system reliability and performance in complex power management scenarios. Its integration of a 12-bit ADC allows for high-resolution monitoring of voltage levels, facilitating accurate detection of supply conditions. The six 8-bit DACs enable fine-tuning of voltage levels, which is critical for maintaining optimal operating conditions in sensitive electronic applications.

The closed-loop margining system is particularly advantageous for applications requiring precise voltage regulation. By adjusting the feedback node or reference voltage of a DC-DC converter, the ADM1066 can dynamically respond to load variations or fault conditions, ensuring that voltage levels remain within specified limits. This feature is essential for maintaining the integrity of electronic components, especially in high-performance environments.

The programmability of the device is another key feature, with ten configurable inputs allowing for comprehensive monitoring of multiple supply voltages. This capability enables the system to detect and respond to various fault conditions, such as undervoltage or overvoltage situations. The programmable outputs enhance flexibility, allowing designers to implement custom logic control strategies based on the monitored conditions.

Furthermore, the ability to drive the gate of an N-channel FET with a 12 V output provides additional control over power distribution within the system. This feature facilitates the integration of the ADM1066 into existing power architectures without the need for extensive additional circuitry.

Overall, the ADM1066 stands out as a versatile and powerful solution for power supply monitoring and sequencing, making it suitable for a wide range of applications in both industrial and consumer electronics. Its combination of monitoring, control, and programmability positions it as a critical component in modern electronic designs.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 that enables sup

ply 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 the boards functionality at -5% of nominal supplies), or CAN be used dynamically to accurately control the output voltage of a dc-to-dc converter.

The device also provides up to 10 programmable inputs for monitoring under, over, or out-of-window faults on up to 10 supplies. In addition, 10 programmable outputs CAN be used as Logic enables. Six of these programmable outputs CAN also provide up to a 12 V output for driving the Gate of an N-channel FET that CAN be placed in the path of a supply.

The device is controlled via configuration data that CAN be programmed into an EEPROM The whole configuration CAN be programmed using an intuitive GUI-based software package provided by Analog Devices, Inc. 🔗 External reference