## ADM6348-41ARTZ-R7: Technical Overview The **ADM6348-41ARTZ-R7** is a precision voltage monitoring device manufactured by Analog Devices. It is primarily used as a microprocessor supervisory circuit to monitor power supply levels and provide a reset signal to a processor when the voltage drops below a specific threshold. --- ### Key Specifications | Feature | Specification | | :--- | :--- | | **Reset Threshold** | 4.10V (Typical) | | **Output Type** | Open-Drain (Active-Low) | | **Supply Voltage Range** | 1.0V to 5.5V | | **Supply Current** | 7 µA (Typical) | | **Reset Timeout Period** | 100 ms (Minimum) | | **Package / Case** | SOT-23-3 | | **Operating Temperature** | -40°C to +85°C | --- ### Core Functional Parts #### 1. Voltage Comparator and Reference The heart of the IC is a high-precision bandgap reference and a comparator. It constantly compares the voltage at the $V_{CC}$ pin against the internal 4.10V reference. Because it is pre-trimmed at the factory, it offers high accuracy without requiring external resistors. #### 2. Reset Generator (Delay Timer) Once $V_{CC}$ rises above the threshold, the device does not deactivate the reset signal immediately. It contains an internal timer that holds the **RESET** line low for a minimum of 100ms. This ensures that the system power supply has fully stabilized before the microprocessor begins its boot sequence. #### 3. Output Stage (Open-Drain) The ADM6348 features an **Open-Drain** output. - **Requirement:** It requires an external pull-up resistor (typically 10kΩ to 100kΩ) connected to a voltage source (usually $V_{CC}$). - **Advantage:** This allows for "wired-OR" logic where multiple reset sources can trigger the same reset line, and it allows the reset signal to interface with different logic voltage levels. --- ### Application Circuit Example To use this part in a digital circuit, the wiring is typically minimal: ```markdown VCC (4.1V+ Source) ----+---- [ VCC Pin ] | [ 10k Pull-up ] | Microcontroller RST <--+---- [ RESET Pin ] [ GND Pin ] ---- Ground ``` ### Main Use Cases * **Microprocessor Systems:** To prevent code execution errors during power-up or brownout conditions. * **Intelligent Instruments:** Ensuring stable operation in portable handheld devices. * **Embedded Controllers:** Protecting memory integrity by holding the CPU in reset if the voltage fluctuates. ---