The MAX9721 delivers up to 20mW per channel into a 32 load and achieves 0.006% THD+N. An 80dB at 1kHz power-supply rejection ratio (PSRR) allows the MAX9721 to operate from noisy digital supplies without an additional linear regulator. The MAX9721 includes 8kV ESD protection on the headphone output. Comprehensive click-and-pop circuitry suppresses audible clicks and pops at startup and shutdown. A low-power shutdown mode reduces supply current to 1.0A (typ).