### ADS02008MR-R: Component Overview The **ADS02008MR-R** is a high-performance, miniature dynamic speaker manufactured by **PUI Audio**. It is specifically designed for space-constrained applications that require clear audio output, such as handheld devices or medical equipment. --- ### 1. Technical Specifications Below are the primary electrical and physical characteristics of the component: | Parameter | Specification | | :--- | :--- | | **Speaker Type** | Dynamic, Permanent Magnet | | **Impedance** | 8 Ohms ± 15% @ 1.5 kHz | | **Power Rating (Rated)** | 0.2 Watts (200 mW) | | **Power Rating (Max)** | 0.5 Watts (500 mW) | | **Resonant Frequency (Fo)** | 850 Hz ± 20% | | **Frequency Range** | 850 Hz ~ 10,000 Hz | | **Sound Pressure Level (SPL)** | 84 dB ± 3dB @ 0.1W/0.1M | | **Magnet Material** | NdFeB (Neodymium) | | **Cone Material** | Mylar | --- ### 2. Key Features and Construction * **Neodymium Magnet:** Utilizes a Neodymium-Iron-Boron (NdFeB) magnet, which provides a high magnetic flux density in a tiny footprint, allowing for higher efficiency and lower weight. * **Mylar Cone:** The diaphragm is made of Mylar (polyester film). This makes the speaker resistant to moisture and environmental humidity compared to paper-cone speakers. * **Small Form Factor:** Usually features a diameter of approximately 20mm and a very slim profile, making it ideal for "thin" electronic enclosures. * **RoHS Compliant:** The "-R" suffix indicates that the part is lead-free and meets RoHS environmental standards. --- ### 3. Connection and Integration To integrate this speaker into a circuit, developers typically use a small audio amplifier or a PWM signal from a microcontroller (filtered). #### Example: Simple Audio Driving Circuit ```cpp // Pseudocode for driving the speaker via a PWM pin (Simple Tones) void setup() { pinMode(SPEAKER_PIN, OUTPUT); } void loop() { tone(SPEAKER_PIN, 1000); // Send 1kHz square wave delay(500); noTone(SPEAKER_PIN); delay(500); } ``` --- ### 4. Common Applications * **Medical Devices:** Handheld heart rate monitors, glucose meters, or infusion pumps. * **Portable Electronics:** Handheld scanners, GPS units, and walkie-talkies. * **Industrial:** Alert systems for panels or mobile testing equipment. * **Consumer Goods:** Electronic toys or smart appliances requiring feedback pings.