The **EM6013P-BC** is a specific model of an **Electret Condenser Microphone (ECM)** capsule. These components are widely used in consumer electronics for converting acoustic sound into electrical signals. Below is a detailed breakdown of its specifications, internal construction, and pinout. ### 1. Technical Specifications The model name "6013" usually denotes the physical dimensions (6.0mm diameter by 1.3mm height). | Feature | Specification (Typical) | | :--- | :--- | | **Diameter** | 6.0 mm | | **Height** | 1.3 mm | | **Directionality** | Omnidirectional (picks up sound from all directions) | | **Sensitivity** | -38dB to -44dB (range varies by specific sub-grade) | | **Operating Voltage** | 1.0V – 10V DC (Standard: 2.0V) | | **Current Consumption** | 0.5 mA (Maximum) | | **Signal-to-Noise Ratio** | >58 dB | | **Output Impedance** | Low Impedance (typically <2.2 kΩ) | --- ### 2. Internal Components The EM6013P-BC consists of several key electronic parts integrated into the small metal housing: * **Electret Diaphragm:** A thin plastic film with a permanent electrostatic charge. * **Back Plate:** A stationary conductive plate that forms a capacitor with the diaphragm. * **JFET (Internal Transistor):** Because the capacitance of the capsule is very small, the output impedance is extremely high. An internal **Junction Field Effect Transistor (JFET)** acts as an impedance converter/amplifier to make the signal usable. * **Case (Shielding):** An aluminum housing that protects the internal components from Electromagnetic Interference (EMI). --- ### 3. Connection and Pinout This component is a "pin-type" or "solder pad" version (indicated by the **P** in the model name). It typically has two connection points: 1. **Terminal 1 (Output/V+):** This pin carries the audio signal and receives the DC bias voltage through a load resistor. 2. **Terminal 2 (Ground):** This pin is physically connected to the metal casing of the microphone to provide shielding. --- ### 4. Basic Application Circuit To use the EM6013P-BC, you must provide a "Bias Voltage" because of the internal JFET. ```text VCC (+3V/5V) | [RL: 2.2k Ohm Resistor] | +----------[C: 1uF Capacitor]---- Audio Out | [MIC Pin 1] [MIC Pin 2] | GND ```