ADM8691ARW

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The ADM8691ARW is a supervisor IC from Analog Devices that is widely used in products that demand precision timing. The device is integrated into the system to monitor power up/down signals, reset signals and battery voltage levels, and provides a convenient way to ensure safe operation of power-hungry devices. In this article, we will discuss the application field and working principles of ADM8691ARW.

The ADM8691ARW is designed as a reset generator and an active-high reset signal optimizer. Its main application field is power management ICs (PMICs). As a PMIC, the device is used to monitor power supply levels, to provide voltage control, to monitor power sequences, or to generate interrupts. In addition, the device is also used in microprocessors, digital signal processor (DSP) systems, SRAMs and field programmable gate array (FPGA) systems.

The ADM8691ARW has the ability to provide precision timing for powering up/down a system. It has three selectable reset modes, which include Active-High Reset, Manual Reset, and Timeout Reset. In Active-High Reset mode, the ADM8691ARW will monitor the voltage level of an external reset signal and generate an active-high reset pulse automatically when the power supply voltage drops below a certain level. This helps to ensure fast and reliable power up/down sequences of a system. In Manual Reset mode, the ADM8691ARW can be programmed to generate a manual reset pulse in order to reset a system. Finally, in Timeout Reset mode, the ADM8691ARW can be programmed to generate a reset pulse after a certain time period has elapsed after power up.

The ADM8691ARW also provides two monitoring functions that are used to detect low supply voltage and battery failure levels. The first monitor function is the Power Supply Monitor, which can be used to detect low power supply voltages. This function can be programmed to generate an active-high reset pulse if the monitored supply voltage drops below a certain programmed threshold level. Additionally, the ADM8691ARW also provides a battery monitor function that can be used to detect low battery voltages. The battery monitor can be used to detect battery failure levels and generate an active-high reset pulse in order to prevent system damage.

The ADM8691ARW also supports two lockout functions. The first lockout function is the Input Lockout, which can be used to lockout external signals from the device. This function is especially useful in situations where the input signals need to be blocked while the system is in a state of reset. The second lockout function is the Output Lockout, which can be used to automatically lower the output reset signal when an external signal is detected. This lockout function is ideal for applications that require precision timing for powering on/off a system.

Finally, the ADM8691ARW is equipped with an on-chip oscillator. This oscillator is used to generate the reset pulse. The oscillator frequency is selectable and can be programmed from 28KHz to 1MHz. Additionally, the oscillator can be used to generate a minimum reset pulse width of 64kHz to 32ms.

In conclusion, the ADM8691ARW is a small and reliable reset generator and active-high reset signal optimizer. The device is designed to be used in PMICs as well as in microprocessor, DSP, SRAM, and FPGA systems. It provides three selectable reset modes, two monitoring functions and two lockout functions, and an on-chip oscillator to generate the reset pulse. Therefore, the ADM8691ARW is a great choice for applications that require precision timing and reliable power up/down sequences.

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