ADM1815-R23AKS-RL7

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Power management integrated circuits (PMIC) are an essential part of modern electronic systems, providing the required active and passive components for power supply regulation. Supervisors are PMICs that provide additional protection for the circuits by monitoring various system conditions or parameters. ADM1815-R23AKS-RL7 is a supervisory device from Analog Devices typically used in a wide range of commercial and medical applications.

The ADM1815-R23AKS-RL7 is an 8-pin package that provides a low quiescent current reset latching operation with an adjustable, non-latching reset delay. This device’s reset pulse width is internally set to 105ms, but is adjustable using an external capacitor. It can be used to monitor battery and AC power input ranges, as well as provide a reset and supervisor function for a wide range of digital systems. It also includes an error comparator and active-low reset output.

This supervisor is typically used in battery-powered systems, automotive applications and medical instrumentation, such as portable ultrasound systems, glucose monitors and medical infusion pumps. In these medical applications the supervisor chip plays an important role in maintaining the device’s performance, reliability and safety.

Working Principle

The ADM1815-R23AKS-RL7 has an extended battery input range of up to 17V, and an AC power input range of up to 35V. It includes an error comparator and an active-low reset output to alert the system of any abnormality.

The device is designed to detect any power drop that is larger than the user-defined threshold, and will provide a reset in order to prevent any serious damages. When the power is removed, the device sets itself to reset until the power is restored. The ADM1815-R23AKS-RL7 can also detect any short-circuits or abnormal voltage levels, and will protect the system from further damage by setting itself to reset.

The ADM1815-R23AKS-RL7 is able to detect pre-defined over-voltage, under-voltage and temperature conditions, setting itself to reset based on the user’s thresholds. Upon detection of an error signal, the device will activate the reset pin and reset the system.

The ADM1815-R23AKS-RL7 also includes an internal watchdog timer, which allows the detection of system errors.It continually monitors the system, and upon detecting a system error, the watchdog activates and sets itself to reset. This helps to reduce the false triggering of the reset signal and provides further protection to the system.

Finally, the ADM1815-R23AKS-RL7 provides a built-in security feature which involves a dual reset signal. This feature helps to prevent an unauthorized intrusion. It requires two secure reset signals, which must be received within certain time limits, in order for the system to remain active. This helps to provide an extra layer of protection for the system.

Conclusion

The ADM1815-R23AKS-RL7 is a low-power, high-performance supervisor IC that can be used in various battery and AC powered systems. It provides a reset latching operation, adjustable non-latching reset delay and a range of protection features. The device is suited for a wide range of applications such as medical instrumentation, portable ultrasound systems, glucose monitors and infusion pumps.

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