LM386 Operational Amplifier DIP-8
🔊 LM386 IC – Low Voltage Audio Power Amplifier – DIP-8
The LM386 is a popular audio power amplifier IC designed for low-voltage consumer applications. It is ideal for projects requiring a simple and compact amplifier circuit to drive small speakers. With minimal external components, the LM386 can produce excellent audio output from battery-powered devices.
⚙️ Technical Specifications
| Parameter | Specification |
|---|---|
| IC Type | Low Voltage Audio Amplifier |
| Package Type | DIP-8 |
| Supply Voltage (Vcc) | 4V to 12V (or up to 18V max) |
| Output Power | 325 mW @ 6V supply into 8Ω speaker |
| Voltage Gain | 20 (internal), adjustable up to 200 |
| Input Resistance | 50 kΩ |
| Bandwidth | 300 kHz |
| Output Load | 4Ω to 32Ω speakers |
| Low Quiescent Current | ~4 mA |
📌 Pin Configuration (DIP-8)
| Pin | Function |
|---|---|
| 1 | Gain |
| 2 | Inverting Input (–) |
| 3 | Non-Inverting Input (+) |
| 4 | GND |
| 5 | Output |
| 6 | Vcc (Power Supply) |
| 7 | Bypass (for filtering) |
| 8 | Gain |
Pins 1 and 8: Connect a capacitor (e.g. 10 µF) between them to increase gain (up to 200).
🛠️ Applications
Battery-powered speakers
Portable radios and audio gadgets
DIY amplifiers
Arduino/ESP32 audio projects
Audio preamps and tone generators
🎥 YouTube Tutorial