## ADCMP392ARZ: Overview and Technical Specifications The **ADCMP392ARZ** is a dual, rail-to-rail input, low-power comparator manufactured by Analog Devices. It is specifically designed for general-purpose monitoring and power-sensitive applications. --- ### 1. Key Features and Functions The ADCMP392ARZ belongs to a family of comparators that emphasize efficiency and versatility. | Feature | Specification | | :--- | :--- | | **Comparator Type** | Dual (Two independent comparators) | | **Output Type** | Open-Drain | | **Input Range** | Rail-to-Rail | | **Supply Voltage Range** | 2.3 V to 5.5 V | | **Quiescent Current** | ~22.1 μA (Low Power Consumption) | | **Propagation Delay** | ~4 μs | | **Package** | 8-Lead SOIC (Small Outline Integrated Circuit) | --- ### 2. Internal Architecture and Pin Configuration The device features two separate comparator units within a single 8-pin package. * **Rail-to-Rail Input:** The input common-mode range spans the entire supply voltage, allowing it to sense signals very close to ground or the positive rail. * **Open-Drain Output:** This requires an external pull-up resistor. This feature is useful for **level shifting** (the output can be pulled to a different voltage than the supply) or **wired-AND logic** configurations. * **Internal Glitch Immunity:** It is designed to be stable even with slow-moving input signals. #### Pin Mapping (8-Lead SOIC) | Pin No. | Mnemonic | Description | | :--- | :--- | :--- | | 1 | OUTA | Output of Comparator A | | 2 | -INA | Inverting Input of Comparator A | | 3 | +INA | Non-inverting Input of Comparator A | | 4 | GND | Ground | | 5 | +INB | Non-inverting Input of Comparator B | | 6 | -INB | Inverting Input of Comparator B | | 7 | OUTB | Output of Comparator B | | 8 | VCC | Supply Voltage | --- ### 3. Common Applications The ADCMP392ARZ is widely used in battery-powered and industrial systems due to its low power draw. * **Voltage Detectors:** Monitoring battery levels or power rails. * **Window Comparators:** Using both units to check if a signal is within a specific high/low range. * **Threshold Detectors:** Triggering an event when a sensor reaches a specific voltage. * **Level Translators:** Converting signals between different logic levels (e.g., 3.3V to 5V). --- ### 4. Comparison with Related Models Analog Devices offers variations within this series depending on the output stage requirements: | Model | Channels | Output Type | | :--- | :--- | :--- | | **ADCMP391** | Single | Open-Drain | | **ADCMP392** | **Dual** | **Open-Drain** | | **ADCMP393** | Quad | Open-Drain | | **ADCMP395** | Dual | Push-Pull | ---