ADM803SAKSZ-REEL

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ADM803SAKSZ-REEL Application Field and Working Principle

ADM803SAKSZ-REEL, which belongs to a family of Voltage Supervisors, is a Power Management Integrated Circuit (PMIC) that provides an integrated solution for regulating microprocessor (uP) power supply voltage in systems utilizing an adjustable power supply. It integrates several features that enable it to function as a uP power supply monitor, including an adjustable voltage threshold, an active low reset output and an alarm output.

The ADM803SAKSZ-REEL can be used in a variety of applications requiring a reliable and accurate power supply monitoring and reset functions, such as portable electronic devices, unmanned vehicles and medical equipments. Its low power consumption and small size make it suitable for these kinds of projects.

Working Principle

The ADM803SAKSZ-REEL monitors power supply voltage and compares it with an adjustable threshold. When the input voltage is lower than the threshold, the supervisor circuit generates an active low reset signal and an alarm signal, and keeps them low to reset the uP and alert system. When the input voltage returns to a safe level, the chip disables both signals and resumes normal operation. An adjustable delay time can be set so the reset signal is active at least for a certain amount of time when power supply falls below the threshold.

The chip also has a built-in temperature sensor which monitors die temperature and generates an alarm signal when the temperature is higher than a specified level. This temperature alarm threshold can be adjusted and the alarm signal can be disabled if it is not needed.

Benefits of ADM803SAKSZ-REEL

The ADM803SAKSZ-REEL provides an integrated solution for power monitoring and reset, which eliminates the need to design external components. It ensures high accuracy and low current consumption, making it ideal for battery-powered and small form-factor devices. The adjustable voltage threshold can be set to match the system’s requirements, while the temperature alarm threshold can be adjusted as well.

The chip offers a low active-low reset signal with a minimum pulse width, which ensures that the processor is reset correctly when power supply voltage falls below the threshold. The adjustable reset delay time provides additional safety and prevents unexpected resets when the voltage drops momentarily.

Finally, the ADM803SAKSZ-REEL supports both single power-supply and dual power-supply operations, which simplifies system designs for more specific requirements.

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