ADM2914-2ARQZ-RL7

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Introduction

Power management integrated circuits (PMICs) are devices thatmanage the power within a system. They simplify the complexity of the power supply design and reduce the number of components required toperform the same function. One type within the PMIC family is Supervisors, which are designed to detect, measure and protect system parameters such as voltage, current, temperature, or frequency. The ADM2914-2ARQZ-RL7 is a voltage supervisor which is designed to protect circuits against over-voltage conditions and provide power-on reset functionality.

Overview

The ADM2914-2ARQZ-RL7 is a voltage supervisor device with a -2.7V to +6.2V operating range. It features an active-low reset output (RST) and a watchdog timer output (WDT_OUT) to indicate a power-on reset state or a fault condition. This device has an adjustable threshold voltage that can be set via an external resistor divider. The ADM2914-2ARQZ-RL7 also has a watchdog timer that provides a timed reset output to detect and reset system faults or process anomalies. It also has a watchdog input (WDT_IN) that can be used to reset the device after a watchdog timer time-out.

Application Areas

The ADM2914-2ARQZ-RL7 is well suited for a wide range of applications such as Automotive, Industrial, Medical, and Computer and Networking Equipment. Automotive applications include power supply monitoring and reset control for ECM’s (electronic control modules), ADAS (advanced driver assistance systems) and infotainment systems. Industrial applications include motor control and large scale inverter systems. Medical applications include powering patient vital monitors and bedside medical equipment. Computer and networking applications include providing reset control for CPUs, memory modules, and other peripheral devices.

Working Principle

The ADM2914-2ARQZ-RL7 monitors an external voltage and generates a reset signal upon detection of an over-voltage condition or an externally triggered reset event. When the signal level on the voltages-monitoring pin (VCC) exceeds the preset threshold voltage (VTH) the device, or alternatively the output signal (RST) on the reset pin, will be activated. The device also provides a watchdog timer to generate a reset signal in the event of a fault or process anomaly. The watchdog input provides a timed reset output (WDT_OUT) when the timer has elapsed. If aWatchdog timeout occurs, the reset signal (RST) will be changed to low. The ADM2914-2ARQZ-RL7 can also be reset externally via a rising signal on the watchdog input pin (WDT_IN) or by power cycling the device.

Conclusion

The ADM2914-2ARQZ-RL7 is a versatile voltage supervisor device with a wide operating voltage range and adjustable threshold voltage. It is well suited for a variety of applications and is capable of detecting, measuring and protecting system parameters such as voltage, current, temperature, or frequency. The device also provides power-on reset functionality and a watchdog timer to detect and reset system faults or process anomalies. The ADM2914-2ARQZ-RL7 is an excellent choice when considering a supervisor device for a wide range of applications.

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