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The audio acquisition board card mainly uses the TI TLV320AIC3254 audio codec+ TPA2012D2RTJ power amplifier.

The TLV320AIC3254  is a flexible,low-power, low-voltage stereo audio code with programmable input and outputs.PowerTune features, fully-programmable miniDSP, fixed predefined and parameterizable signal processing module, integrated PLL, integrated LDO and flexible digital interface, support for I2C and SPI.

The internal structure of the TLV320AIC3254, as shown in Fig TPA2012D2 is a stereo class D audio amplifier, and TPA2012D2 provides independent closing control for each channel. Use the G0 and G1 gain selection pins to select the gain at 6,12,18 or 24 dB, mainly on the voice acquisition card that plays collected sound through the headset port.

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