ADM1811-5AKSZ-REEL

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ADM1811-5AKSZ-REEL is a microprocessor Reset circuit with active-high reset, active-low reset, and watchdog functions packed into a single 8-Pin package. It is part of the Analog Devices, Inc. (ADI) line of advanced System-on-Chip (SoC) Protection and Supervisors products, which provide advanced protection, performance and flexibility for SoC devices.

The integrated device provides reset functions for microprocessors and digital controllers by sequencing power-up, monitoring system operation, and providing controlled system shutdown when a fault is detected. The device offers active-high and active-low reset output lines that can be used in a symmetric (bidirectional) NANDSWAP reset chain, and also features a Watchdog Timer with reset output to restart a blocked system. The watchdog timer has selectable output timeout options and can be easily configured on a system-by-system basis.

The ADM1811-5AKSZ-REEL operating voltage is up to 5.5V, with a guaranteed reset threshold of 3V. It has an ultra-low current consumption of 5µA max. This combined features makes the device ideal for use in wide variety of applications such as consumer electronics, automotive, industrial and medical applications where low-power and high reliability are of primary importance.

The ADM1811-5AKSZ-REEL is also equipped with a Short-Circuit Protection feature, which prevents damage to the device due to output over-current or short-circuit conditions. The device also includes an Output Disable circuitry, providing an additional level of protection by preventing unintentional switching from devices that share the same logic level.

The device’s dual-output and on-chip watchdog timer make the ADM1811-5AKSZ-REEL an ideal choice for use in various performance-driven applications, such as embedded microcontroller and digital controller applications and Raspberry Pi systems. The device is designed to provide reliable, flexible and cost-effective protection and monitoring in a wide variety of applications.

The ADM1811-5AKSZ-REEL is based on a monitoring circuit that measures the voltage at its input, VCC. The circuit consists of two comparators, one with VCC as its reference, the other with the internally set threshold voltage as the reference. When the voltage falls below the programmed threshold voltage the circuit sets the RESET line low and the Watchdog timer output, /WD, high. This produces a logically high active-low reset that can be used to reset the microprocessor or digital SoC.

The circuit also includes a watchdog timer that continually monitors system operation and, if it detects a fault or block condition, generates a reset using the internal RC oscillator. The watchdog timer’s time-out period is adjustable with the WDTH pin, allowing for the Reset Output assertion time to be adjusted for different applications requirements. It has a minimum guaranteed time-out period of 2.5 seconds.

In summary, the ADM1811-5AKSZ-REEL is an ideal solution for system reset and watchdog timer requirements in a variety of applications including consumer electronics, automotive, industrial and medical systems. Its fast reset response, adjustable watchdog timer and low current consumption make it an attractive choice for use in a wide range of performance-driven designs.

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