ADM694ANZ

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Power Management Integrated Circuits (PMICs) are semiconductor devices that are used to provide various levels of voltage and current output to different electronic components and circuits. PMICs are used to regulate and deliver power to key components, such as microprocessors, digital signal processors, and other chips. One type of PMIC is the Supervisors, which are used to monitor and control the power distribution within the system and provide general protection against over-voltage, under-voltage and temperature conditions. The ADM694ANZ is a popular Supervisors PMIC manufactured by Analog Devices, Inc. Adopted in many consumer products, the ADM694ANZ offers multiple voltage-level protection thresholds, programmable supplies and watchdog timing for reliable operation. This article will discuss the application field and working principle of the ADM694ANZ Supervisors PMIC.

Application Field of the ADM694ANZ

The ADM694ANZ is a three-channel power management supervisor PMIC with integrated power-on reset (POR) and reset watchdog functions. The device is designed to monitor and control power distribution in consumer electronics and embedded systems where low-power operation, density, and reliable system-level protection are critical. The ADM694ANZ is suitable for applications that require low-cost, low-power, and multiple-sensor protection.

The ADM694ANZ is used in a wide variety of consumer electronics devices, such as digital cameras, digital camcorders, portable media players, smart phones, and gaming devices. It is also used in embedded applications, such as industrial control systems and automotive applications. Additionally, the ADM694ANZ is suitable for a variety of power sources, including dual coin-cell input, AC adapter input, and a wide range of battery-powered applications.

Working Principle of the ADM694ANZ

The ADM694ANZ is a three-channel power management supervisor PMIC that provides an integrated POR and Watchdog (WDT) for system-level protection. The device features three threshold voltages for each of its three power supplies, and each of these voltages can be programmed separately. The ADM694ANZ has a reset output, which is activated when any of the three supplies falls below its programmed level.

The ADM694ANZ also features an integrated watchdog timer that monitors system operation with a periodic time-out. The watchdog timer has a programmable interval for reset generation and can be programmed through either a serial port interface or switching DIP switches. The watchdog timer ensures that the system is running correctly and it can be used to reset the system in the event of an unexpected fault or failure.

The ADM694ANZ also provides a manual reset input, which is used to reset the system in the event of a system hang-up. This manual reset input can be triggered either externally via a logic level on a microcontroller, or by a mechanical switch. The ADM694ANZ also includes three digital output pins that can be used to indicate system status.

The ADM694ANZ is able to operate over a supply voltage range from 1.5V to 5.5V, and it allows flexible sequencing of the power-on reset, watchdog reset, and manual reset signals. The ADM694ANZ also features thermal and current protection for the integrated voltage regulator, and it is designed for operation in an extended temperature range.

Conclusion

The ADM694ANZ Supervisors PMIC is a multi-channel device designed for reliable system-level protection in low-power, low-cost applications. The device incorporates integrated protection against over-voltage, under-voltage, temperature, and current faults, and it allows flexible reset sequencing and monitoring with its integrated watchdog timer. The ADM694ANZ is used in a variety of consumer electronics and embedded application, and it can operate over a wide range of supply voltages.

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