Sparkfun 美國製 I2S Audio Breakout-MAX98357A 音頻轉模擬信號模組

商品說明

SparkFun I ² S音頻分線板使用MAX98357A數模轉換器（DAC），可將I ² S（不與I ² C 混淆）音頻轉換為模擬信號以驅動揚聲器。I ² S音頻突破將使用I ² S標準的數字音頻信號轉換為模擬信號，並使用D類放大器放大信號，該放大器可為4Ω負載提供高達3.2W的功率。電路板可配置為僅輸出左聲道音頻，右聲道或兩者。

SparkFun I ² S音頻分線板相當簡單，只需幾個引腳連接即可啟動和工作。默認情況下，電路板配置為“單聲道”操作，這意味著左右信號組合在一起以驅動單個揚聲器。如果您需要為左右音頻通道設置單獨的揚聲器，則需要切斷單聲道跳線。除了能夠選擇音頻通道輸出之外，還可以通過幾種方式配置增益。放大器的增益可以配置為低至+ 3dB至高達+ 15dB。雖然可以在板上配置通道選擇，但是可以使用增益引腳在外部控制增益。默認情況下，電路板配置為+ 9dB，但可以輕鬆更改！

 

規格

• 電源電壓範圍：2.5V – 5.5V。
• 輸出功率：在5V時為3.2W至4Ω。
• 輸出通道選擇：左，右或左/ 2 +右/ 2（默認）。
• 採樣率：8kHz – 96kHz。
• 樣本分辨率：16/32位。
• 靜態電流：2.4mA。
• 無濾波D類輸出
• 不需要MCLK
• 點擊和彈出縮小
• 短路和熱保護。

 

Documents

• wiki
• 概要
• 鷹檔案
• 連接指南
• 數據表（MAX98357A）
• GitHub上

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技術補充（英文原文對照）

以下為原廠英文技術說明，提供使用者參考。

The SparkFun I²S Audio Breakout board uses the MAX98357A digital to analog converter (DAC), which converts I²S (not be confused with I²C) audio to an analog signal to drive speakers. The I²S Audio Breakout converts the digital audio signals using the I²S standard to an analog signal and amplifies the signal using a class D amplifier which can deliver up to 3.2W of power into a 4Ω load. The board can be configured to output only the left channel audio, right channel, or both.

The SparkFun I²S Audio Breakout board is fairly simple, requiring only a few pin connections to get it up and working. By default the board is configured in “mono” operation, meaning the left and right signals are combined together to drive a single speaker. If you want a separate speaker for the left and right audio channels you’ll need to cut the mono jumper. In addition to being able to select the audio channel output, the gain can also be configured in a few ways. The gain of the amplifier can be configured from as low as +3dB to as high as +15dB. While the channel selection can be configured on board, the gain however is controlled externally using the gain pin. By default, the board is configured for +9dB, but can be easily changed!

FEATURES

• Supply Voltage Range: 2.5V – 5.5V.
• Output Power: 3.2W into 4Ω at 5V.
• Output Channel Selection: Left, Right, or Left/2 + Right/2 (Default).
• Sample Rate: 8kHz – 96kHz.
• Sample Resolution: 16/32 bit.
• Quiescent Current: 2.4mA.
• Filterless Class D Outputs
• No MCLK Required
• Click and Pop Reduction
• Short-Circuit and Thermal Protection.