A 106dB audio digital-to-analog converter employing segment flipping technology combined with cascaded dynamic element matching

A 106dB stereo audio digital-to-analog converter having high power supply rejection and reduced jitter sensitivity using newly developed segment flipping technology combined with cascaded dynamic element matching is presented. Current source has high power supply rejection as a segment, however it has worse mismatch characteristics than other commonly used segment device such as resistor and capacitor. Proposed segment flipping technology combined with cascaded dynamic element matching highly reduces the mismatch problems enough to increase the number of current segments for higher jitter tolerance. A 106dB stereo audio digital-to-analog converter using proposed technologies, having high tolerance against power supply noise and clock jitter, is designed, and the fabricated device shows 106.1dB SNR, 104.6dB channel separation, and 0.0018% THD+N at full scale input within 3.39mm² die area.