## Overview of POM-2244P-2-R The **POM-2244P-2-R** is a high-performance electret condenser microphone (ECM) manufactured by **PUI Audio, Inc.** It is designed for general-purpose audio applications requiring a compact form factor and high sensitivity. --- ### Technical Specifications The following table outlines the primary electronic and physical characteristics of the component: | Feature | Specification | | :--- | :--- | | **Type** | Electret Condenser | | **Directionality** | Omni-directional | | **Sensitivity** | -44 ±3 dB (0dB=1V/Pa, 1kHz) | | **Operating Voltage** | 2.0V (Standard), 1.0V to 10V (Range) | | **Current Consumption** | 0.5 mA (Max) | | **Frequency Range** | 50 Hz ~ 20,000 Hz | | **Signal-to-Noise Ratio** | > 60 dB | | **Impedance** | 2.2 kOhms | | **Mounting Type** | Through-hole (PC Pins) | | **Dimensions** | 6.00mm Diameter x 2.70mm Height | --- ### Key Internal Components 1. **Electret Diaphragm:** A thin plastic film with a permanent charge. It acts as one plate of a capacitor. When sound waves hit it, the capacitance changes. 2. **Back Plate:** The stationary plate of the capacitor. 3. **FET (Field Effect Transistor):** Because the impedance of the condenser element is extremely high, an internal FET acts as an impedance converter/amplifier to make the signal usable by standard audio circuits. --- ### Pin Configuration & Connection The device features two pins for PCB mounting: * **Terminal 1 (Output/Power):** This pin carries the audio signal and receives the DC bias voltage via a resistor. * **Terminal 2 (Ground):** Connected to the metal case of the microphone for shielding and grounding. #### Typical Application Circuit To use this part, you generally need a "Phantom Power" or "Bias" circuit: ```text Vcc (+3V to +10V) | [R_load: 2.2k] | +----------[C_coupling: 1uF]------> Audio Out | [Terminal 1] [Microphone] [Terminal 2] | GND ``` --- ### Common Applications * Telecommunication devices (smartphones, headsets). * Voice recognition systems. * Security and monitoring equipment. * Consumer electronics (laptops, tablets).