RPI-HIFI-DAC PCM5122 HIFI DAC Audio Card Expansion Board For Raspberry Pi 3 Model B/2B/B+

Overview The Raspberry pi mother board has one major problem with i2s audio interface The clocks coming from CPU can only output one frequency clock perfect resulting in major problems with audio files sampled at 44khz and multiple Too much jitter on i2s clocks So we enter the master mode for i2s Instead of the RPI giving the clock on the line the DAC itself sends the clocks and RPI sends the data file tobe played Since we used 2 clocks the problem above solved RPI HIFI DAC is unique because of the way we have implemented the design First we separated the power on 3 channels and filter it one for the digital side the second for analog and third for the clocks themselves We use some of the good brand LDOs on the market In addition we used two oscillators with very low jitter for clock units Finally on the analog stage we are using a film capacitor not ceramic for a quiet DC to feed the TI IC to reduce signal distortion Features Dedicated 384kHz 32bit high quality DAC PCM5122 for best sound quality Audio output connectors 2x RCA LEFT Right 3 5mm head phone Jack With 138mw headphone Amplifier can directly drive headphone Work status indicators facilitate the understanding of the system working status HAT size DAC SNR is 112Db DAC THD N 1 dBFS 78dB Full Scale Output of DAC is 2 1Vrms Dynamic Range of DAC is 112dBSampling Frequency ranges from 8kHz to 384kHzUltra low noise voltage regulators for optimal audio performance Integrated EEPROM for automatic