The **CSS-1014G** is a high-sensitivity, omnidirectional electret condenser microphone (ECM) capsule. It is widely used in telecommunications, security systems, and portable audio recording devices due to its compact size and reliable performance. --- ### ## Technical Specifications Below are the primary electrical and physical characteristics of the CSS-1014G: | Parameter | Specification | | :--- | :--- | | **Diameter** | 10.0 mm | | **Height** | 4.5 mm | | **Sensitivity** | -38dB to -44dB (typically @ 1kHz) | | **Directionality** | Omnidirectional (360°) | | **Operating Voltage** | 1.0V to 10V DC (Standard: 2.0V) | | **Current Consumption** | 0.5 mA (Max) | | **Impedance** | Low Impedance (< 2.2 kΩ) | | **Frequency Range** | 50 Hz – 16,000 Hz | | **Signal-to-Noise Ratio** | > 58 dB | --- ### ## Internal Component Breakdown An electret condenser microphone like the CSS-1014G consists of several key electronic parts working in tandem: 1. **Electret Diaphragm:** A thin plastic film (usually Teflon) with a permanent electrostatic charge. It vibrates in response to sound waves. 2. **Back Plate:** A stationary metal plate that, along with the diaphragm, forms a capacitor. 3. **FET (Field Effect Transistor):** Because the capacitance change is extremely small and has high impedance, a built-in JFET acts as an impedance converter/amplifier. It converts the high-impedance signal to a usable low-impedance output. 4. **Housing/Shielding:** A metal (usually aluminum) cylinder that protects the internal components and provides EMI (Electromagnetic Interference) shielding. --- ### ## Basic Application Circuit To use the CSS-1014G, it must be powered via a "Phantom Power" or "Bias" circuit. The following is a standard wiring diagram concept: ```text VCC (2.0V - 5.0V) | [R1: 2.2k Pull-up Resistor] | +----------[C1: 1uF - 10uF Capacitor]-----> Audio Out (Signal) | ( + ) Terminal [ CSS-1014G ] ( - ) Terminal | GND ``` * **R1 (Load Resistor):** Determines the operating current for the internal FET. * **C1 (DC Blocking Capacitor):** Allows the AC audio signal to pass while blocking the DC supply voltage from entering the amplifier/pre-amp stage. --- ### ## Key Features * **High Sensitivity:** Capable of picking up faint sounds at a distance. * **Broad Frequency Response:** Suitable for both human voice and ambient environmental recording. * **Solder Pads:** Usually features two solder pads on the bottom for easy PCB mounting or wire attachment.