ADM691ARZ-REEL Integrated Circuits (ICs)

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PMIC (Power Management integrated Circuits) play an important role in providing power to a range of electronic devices. In particular, supervisors are integrated circuits which monitor power-supply levels and provide necessary fail-safe protection to prevent shutdown due to an undervoltage or overvoltage condition. As such, they are ideal for embedded systems and severe working conditions where external voltage regulators or voltage sources are unavailable.

ADM691ARZ-REEL is a supervisor component from Analog Devices and belongs to the SOT-23-6 package family. It is a two-channel supervisor meant for reset and power-on-reset (POR) functions and has an operating temperature range between -40℃ and +85℃.

This component is well-suited for high-performance, cost-effective power management in applications where a POR and reset are required. It has a high threshold of 4.63V but a low threshold of 2.97V. It features a power-on reset output and provides an active-low reset output with an accurate detection of power-supply voltage. Moreover, it has an adjustable reset time-delay feature with a watchdog configuration, whereby it informs the host microcontroller that the system has reset or powered-on.

The ADM691ARZ-REEL works according to a specific sequence of steps. It first detects the power-on voltage level, which acts as a trigger for the watchdog timer. This timer is used to delay the reset output until the voltage surpasses the 4.63V threshold, thereby ensuring that the system is stable. Once this threshold is exceeded, the reset output is de-asserted and a logic HIGH is generated by the POR output. At this point, the microcontroller will be able to enter its state where it starts storing and executing its code without any problem.

Before the reset process can begin, however, the POR output must reach its LOW level. In order to ensure that the ADM691ARZ-REEL is working properly, a pull-up resistance is connected to RESET output. The pull-up resistor causes the voltage at RESET to drop below 1V, which signals the microcontroller that it is time to reset the system.

The ADM691ARZ-REEL also features an adjustable reset time-delay, which is determined by the external capacitor connected to the component. This feature is incredibly useful because it allows the host microcontroller to postpone the reset process for a period of time , thus giving the system a chance to recover from instability before a reset is needed. Adjusting the reset time in this way also allows for better accuracy when setting the length of a reset.

The ADM691ARZ-REEL is an efficient supervisor component which has a variety of applications, such as in PCs, industrial equipment and embedded systems. Moreover, it is one of the most popular reset and power-on-reset components in the industry due to its reliability and accuracy. Its ability to accurately detect power-supply voltage as well as its adjustable time-delay feature make it a great choice for any application requiring reliable reset and power-on-reset functions.

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