Active power noise reduction feature
Last updated
Last updated
Usually, the 5V power rail of raspberry pi is generated from a DC/DC converter, which always means pool ripple rejection. To overcome this , the power rail of the HAT has been build with two levels of active regulation, which brings extremely good PSRR performance in full band under full load, so the power supply of the DAC would be perfectly clean.
When VDD in full load, PSRR = 111.61dB
When VDD in lite load, PSRR = 119.78dB