موديول مكبر صوت I2S فئة D بقدرة 3 وات MAX98357A
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موديول مكبر صوت I2S فئة D بقدرة 3 وات MAX98357A
عن هذا المنتج
MAX98357 I2S 3W Class D Audio Amplifier Module
The MAX98357A is a compact, high-efficiency Class D audio amplifier that combines an I2S Digital-to-Analog Converter (DAC) and an amplifier on a single board. It is specifically designed to accept digital audio directly through the I2S interface, decoding and amplifying the signal to drive speakers without the need for an external DAC or complex analog circuitry. This makes it an ideal solution for adding high-quality sound to microcontrollers like the ESP32 and Raspberry Pi.
Key Features
Digital-to-Analog Integration: Combines an I2S DAC and a Class D amplifier into one efficient package for direct speaker connection.
High Efficiency: The Class D design ensures minimal power loss, which is perfect for your battery-operated ATLAX project or other portable devices.
Configurable Audio Channels: By default, it mixes stereo signals (L + R) into a single output, but it can be configured via a resistor to output only the Left or Right channel.
Flexible Gain Control: Offers multiple selectable gain options (3dB, 6dB, 9dB, 12dB, 15dB) to match different speaker requirements.
Wide Compatibility: Supports I2S sample rates ranging from 8kHz to 96kHz and is compatible with both 3.3V and 5V logic levels.
Technical Specifications
| Parameter | Value |
| Amplification Type | Class D |
| Output Power | 3.2W at 10% THD (4Ω Speaker, 5V Supply) |
| Operating Voltage | 2.5V – 5.5V DC |
| I2S Logic Levels | 3.3V / 5V compatible |
| Sample Rate Support | 8kHz to 96kHz |
| PSRR | 77dB at 1kHz |
| Dimensions | 19mm × 18mm |
Dimensions
Pin Configuration
| Pin Name | Function | Description |
| Vin | Power Supply | 2.5V to 5.5V input. |
| GND | Ground | Common ground. |
| LRC (WS) | Word Select | Left/Right clock for I2S. |
| BCLK | Bit Clock | Serial clock for I2S data. |
| DIN | Data In | Serial digital audio data input. |
| GAIN | Gain Select | Connect to GND, Vin, or via resistor to set gain. |
| SD / MODE | Shutdown/Mode | Used to turn off the chip or select the audio channel. |
Applications
Robotics: Adding voice feedback or sound effects to autonomous mobile robots.
Smart Home: Designing smart assistants or interactive voice-response systems.
Portable Audio: DIY bluetooth speakers and portable music players.
Educational Tools: Creating interactive prototypes and engineering teaching aids.
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