The **CMP402GS** is a high-speed, low-power comparator manufactured by Analog Devices. It is specifically designed for applications requiring fast response times while maintaining high precision. --- ## 1. Key Technical Specifications The following table highlights the primary electrical characteristics of the CMP402GS: | Parameter | Specification | | :--- | :--- | | **Type** | High-Speed Comparator | | **Propagation Delay** | 65 ns (typical) | | **Supply Voltage (Single)** | +3.0V to +12.0V | | **Supply Voltage (Dual)** | ±1.5V to ±6.0V | | **Supply Current** | 450 µA per comparator | | **Input Offset Voltage** | 2.0 mV (max) | | **Package Type** | 8-Lead SOIC (GS denotes SOIC) | | **Operating Temp** | -40°C to +125°C | --- ## 2. Pin Configuration The CMP402GS is a quad-channel device (the "4" in the series often denotes the family, though the GS 8-pin package usually refers to a **Dual** configuration). ### Standard Dual Pinout (8-Pin SOIC): 1. **OUT A**: Output of comparator A 2. **-IN A**: Inverting input of comparator A 3. **+IN A**: Non-inverting input of comparator A 4. **V- / GND**: Negative supply or ground 5. **+IN B**: Non-inverting input of comparator B 6. **-IN B**: Inverting input of comparator B 7. **OUT B**: Output of comparator B 8. **V+**: Positive supply --- ## 3. Notable Features * **Rail-to-Rail Inputs:** The input common-mode range includes both supply rails, allowing it to handle signals across the full power spectrum. * **Low Power Consumption:** At approximately 450 µA per channel, it is ideal for battery-operated or portable electronic devices. * **No Minimum Slew Rate:** Unlike some high-speed parts, it remains stable even with slow-moving input signals. * **CMOS/TTL Compatible:** The outputs can interface directly with standard digital logic families. --- ## 4. Typical Applications The CMP402GS is used in circuits where a rapid transition from analog to digital signals is required: * **Clock Recovery Circuits:** Restoring square waves from distorted signals. * **Zero-Crossing Detectors:** Identifying when an AC signal crosses 0V. * **Window Comparators:** Determining if a voltage stays within a specific range. * **Level Translators:** Converting signals between different voltage logic levels (e.g., 5V to 3.3V). --- ## 5. Circuit Implementation Example Below is a simple representation of how to wire the CMP402 as a basic threshold detector: ```cpp // Logic Representation If (Voltage_at_Pin3 > Voltage_at_Pin2) { Output_Pin1 = High (V+); } else { Output_Pin1 = Low (V-); } ```