ADM2914-1ARQZ

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PMIC - Supervisors are a type of integrated circuits used to monitor and control the different voltages and supply rails of the system. The ADM2914-1ARQZ is part of this family and is designed for applications requiring a supervisor with a low-power consumption and high-accuracy voltage monitoring. This article will explain the application field and working principle of the ADM2914-1ARQZ.

The ADM2914-1ARQZ

The ADM2914-1ARQZ from Analog Devices was developed to monitor voltages and supply rails in order to ensure correct operation of the system. It offers a adjustable voltage supervision, manual reset, push-pull reset and active-low or push-pull reset capability with three voltage monitoring inputs. It also has a low-power consumption of 1.2 μA in the Sleep Mode and is capable of monitoring an input voltage range of 1.2 V to 5.3 V. The ADM2914-1ARQZ can be used both in regulated and unregulated power supply applications.

Application Field

The ADM2914-1ARQZ is suitable for low-voltage monitoring applications in Wide Input Voltage (WIV) power vessels, such as communication systems, personal computers, office equipment, industrial PCs, air conditioners and vending machines, among others. It is especially well-suited for use in applications where a low-power solution is needed, such as battery-operated or portable devices. The device can be used for monitoring of Vin, Vout, VDDQ and VDD in Flat Panel Display (FPD) power supplies.

Working Principle

The ADM2914-1ARQZ employs a comparator circuit to monitor the input voltage and determine whether it is within the specified range. The three Voltage Monitoring Inputs (VMI) can be used to monitor the voltage in different circuits. The input voltage is compared against the reference voltage generated by the Reference Generator circuit. If the input voltage is lower than the reference voltage, the Reset Output will be activated, signaling the system over-voltage and/or under-voltage condition. The Reset Output can be configured to active-low, open-drain or push-pull reset. The device also has manual reset and push-pull reset capabilities.

Conclusion

The ADM2914-1ARQZ is a low-power voltage supervisor designed for applications requiring accurate voltage monitoring and control. It is suitable for use in wide input voltage applications such as communication systems, personal computers, office equipment and air conditioners. The device employs a comparator circuit to compare the input voltage to a reference voltage and activates the Reset Output if the input voltage is outside of the specified range. This makes it ideal for monitoring the voltage in different circuits, such as Vin, Vout, VDDQ and VDD in FPD power supplies.

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