## ADM6348-46ARTZ-R7: Technical Overview The **ADM6348-46ARTZ-R7** is a precision voltage monitoring device manufactured by **Analog Devices**. It is primarily used as a microprocessor supervisory circuit to monitor power supply voltage levels and provide a reset signal to a system's processor when the voltage falls below a specific threshold. ### Key Specifications | Parameter | Value / Description | | :--- | :--- | | **Part Number** | ADM6348-46ARTZ-R7 | | **Manufacturer** | Analog Devices | | **Threshold Voltage** | 4.63V (Typical) | | **Reset Type** | Active-Low, Open-Drain | | **Timeout Period** | 100 ms (Minimum) | | **Supply Current** | 1 µA (Typical) - Ultra-low power | | **Package** | SOT-23-3 | | **Temperature Range** | -40°C to +85°C | --- ### Functional Components & Operation 1. **Voltage Detector:** The IC contains a high-accuracy comparator that constantly monitors the $V_{CC}$ pin against an internal reference voltage. 2. **Reset Generator:** If $V_{CC}$ drops below the factory-set threshold (4.63V), the **RESET** output is asserted (driven low). 3. **Delay Timer:** Once $V_{CC}$ rises back above the threshold, the device holds the reset signal for a "timeout period" (approx. 100ms to 150ms). This ensures the power supply has stabilized before the processor begins execution. 4. **Open-Drain Output:** The output is open-drain, meaning it requires an external pull-up resistor to the desired logic voltage level. This allows for level shifting if the processor operates at a different voltage than the monitor. ### Typical Application Circuit ```mermaid graph LR VCC((VCC 5V)) -->|Pin 3| IC[ADM6348] IC -->|Pin 2| GND[GND] VCC -->|Pull-up Resistor| ResetLine[Reset Line] IC -->|Pin 1 / RESET| ResetLine ResetLine --> MCU[Microprocessor Reset Pin] ``` --- ### Applications * **Microprocessor Systems:** Ensuring clean startups and preventing code execution during brownout conditions. * **Intelligent Instruments:** Protecting data integrity during power fluctuations. * **Portable Equipment:** Due to its ultra-low current consumption (1µA), it is ideal for battery-operated devices. * **Automotive Systems:** Monitoring stable power rails for sensors and controllers.