ADM691AANZ

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

Introduction to the ADM691AANZ

The ADM691AANZ is an active-low, resettable supervisor IC with a watchdog timer for providing maximum system security in automotive, industrial control and instrumentation applications. Developed by Analog Devices, the ADM691AANZ is available in a low-power, 3-pin SOT-23 package with a wide temperature range of –40°C to +125°C. The IC is designed to maximize overall system reliability for challenging automotive applications.

Application Field and Working Principle

The ADM691AANZ is designed for applications in harsh automotive electrical environments and is used to detect and reset system malfunctions that cause reset pulses of less than 10 ms. With a typical reset active time of 64 ms, it is suitable for automotive, industrial control and instrumentation applications, especially those requiring high power requirements such as injectors, ignition, lighting and other applicable automotive applications. The IC utilizes an active-low reset logic to ensure system safety in case of a hard fault, and features a watchdog timer, detect and reset logic, and push-pull output drivers.

The ADM691AANZ operates off of a 1.8V to 5.5V supply voltage and has a low-voltage turn on threshold of 1.2V. The watchdog input detects a fault and is reset by a negative reset pulse longer than 30 μs. The detect logic detects fault conditions associated with the power supply and is also reset by a negative reset pulse longer than 30 μs. The reset output provides an active-low reset designed to drive up to 10.2 mA. It comes equipped with extended temperature performance of –40°C to +125°C and is AEC-Q100 qualified.

The working principle of the ADM691AANZ is relatively simple. When the power supply falls below its threshold of 1.2V, or the watchdog input is pulsed with a signal, the active-low reset pulse is issued, driving the output to reset the system. When power supply and watchdog input voltages return to normal, the reset pulse is terminated and the device resumes its normal operations.

Conclusion

In conclusion, the ADM691AANZ active-low, resettable supervisor IC is an excellent choice for automotive, industrial control and instrumentation applications. With a reset time of 64 ms, a wide temperature range of –40°C to +125°C, and AEC-Q100 qualification, it is designed to offer maximum system reliability. Additionally, its simplicity of operation makes it an ideal choice for applications with challenging power requirements.

The specific data is subject to PDF, and the above content is for reference