ADM691AARN-REEL

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The ADM691AARN-REEL is a micropower reset circuit with a low minimum operating current of 25 μA and a supply voltage range of 4.5 V to 18 V. It belongs to the family of PMIC (power management integrated circuits) supervisors. With its tiny size and thermally enhanced R-6 package, the device is ideal for space-restricted applications and provides excellent performance in the most challenging thermal environments.

The ADM691AARN-REEL is designed to guard against loss of control that may occur due to power glitches, brownouts, software problems or EMI/RFI disturbances. It monitors an external circuit such as a microprocessor to detect if it is functioning properly. If the monitored circuit does not continue to meet the specified requirements, the ADM691AARN-REEL will assert a reset signal which re-starts the system. By preventing circuitry from locking up or running erratically, the ADM691AARN-REEL provides a safety net to prevent costly system downtime and eliminate the need for manual intervention.

The ADM691AARN-REEL reset circuit monitors power supply voltage and asserts an active low reset signal to the system when it falls below a typically preset threshold. An internal bias current is used to provide a sensitivity of 10 mV (typical) per lmV (typical). When the power supply voltage returns to a safe level, the reset signal is de-asserted and the system can continue to function normally.

The ADM691AARN-REEL offers additional features, including a power-on reset and a manual reset input. A power-on reset forces the reset signal low anytime the supply voltage is greater than the preset power-on reset threshold. A manual reset input allows the reset signal to be forced low by an external signal source. This feature is useful for debugging purposes or to quickly re-start the system. The device also includes an open-drain reset signal and a power-good output for status monitoring.

The ADM691AARN-REEL monitoring circuit includes an internal reference and comparator which allows for easy adjustment of the reset threshold. The reset threshold can easily be adjusted with an external resistor divider, allowing the user to tailor the reset point to their particular application. The device also features a low quiescent current and a very low reset current of only 10 μA. The quiescent current of the ADM691AARN-REEL is typically less than 10 μA, making it more power efficient than many other reset devices.

The ADM691AARN-REEL is suitable for many applications, such as general-purpose microprocessor systems, battery-powered systems, and communications and networking equipment. Its package size and low power requirements make it especially useful for portable and remote devices, saving space and reducing battery load. The device also features thermal protection, allowing it to operate in temperatures from -40°C to +105°C.

The ADM691AARN-REEL reset circuit is designed to provide superior reliability and superior performance in the most extreme temperature and power conditions. The device is an excellent choice for many applications and provides users with dependable system supervision and thermal protection.

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