ADM697AR

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PMIC (Power Management Integrated Circuit) is an integral part of modern electronic circuits and is used to monitor, manage and regulate the power supply for various electronic components. One of the more common examples for PMICs is the ADM697AR supervisor, which consists of a reset system, monitoring system and sequencing system. ADM697AR is mainly applicable in system level, peripheral level, memory level and high reliability systems.

The reset system in the ADM697AR supervisor is a reset circuit composed of a voltage reset circuit, a temperature reset circuit and a watchdog reset circuit. The voltage reset is triggered when the input power supply voltage falls below a certain threshold, and is used to protect the system during sudden power loss. The temperature reset is triggered when the temperature in the system increases, and serves to provide a safety mechanism to prevent damage to components. The watchdog reset serves as an additional layer of protection, which prevents the system from getting stuck in an unforeseen error state by preventing code execution and resetting the entire system.

The monitoring system in the ADM697AR supervisor is composed of various comparators, which allow the supervisor to monitor various conditions in the system and take action when conditions become unfavorable, such as when the power supply voltage is too low. The comparators, in addition to monitoring the power supply voltage, can also monitor various system status signals, such as the state of a microprocessor, an output enable signal and a databus enable signal.

Finally, the sequencing system ensures that power is supplied to the connected components in the correct order. This prevents damage to any of the components by ensuring an orderly initialization and shutdown process. The sequencing system uses a frequency ratio of 1:3 and provides a maximum sequence speed of 64 ms.

In conclusion, the ADM697AR supervisor is a highly reliable power management integrated circuit, which contains a reset system, a monitoring system and a sequencing system. The reset system allows the supervisor to protect the system in the event of power failure or unexpected temperature increases. The monitoring system enables the supervisor to monitor the power supply voltage and a number of system status signals. Lastly, the sequencing system ensures that the connected components are powered up and powered down in the right order. With its multi-featured capabilities, the ADM697AR supervisor is suitable for system level applications, peripheral level applications, memory level applications and high reliability systems.

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