the PCM2707C from Texas Instruments which takes care of the USB communication and outputs I2S audio data the PCM1794A, a 132dB SNR 24-bit 192kHz DAC which receives I2S protocol the OPA4134 ...
digital buffers I2S interface (ws, sd, sck, gpio), two identical channels L and R: 2-order delta-sigma modulator, current steering DAC, low pass filter, analog buffer. Delta-sigma stereo, audio DAC ...