GENERAL DESCRIPTION
ALC3261 is a highly integration of audio subsystem chip, including two stereo DACs with 100dB SNR, one stereo ADC with 94dB SNR, stereo Class-D speaker amplifiers provides 1.5W per channel into 8Ω or 2.5W per channel into 4Ω with a 5V supply with excellent PSRR and low EMI, a mono differential earpiece amplifier is also provided, providing output from any DAC or Analog-in. It consumes only less than 10mW power during playback, providing tablet system longer battery life under headphone listening mode. The integrated DRC (Dynamic Range Controller) and parametric Equalizer provides further digital sound processing capability of audio playback paths. The DRC in ALC3261 continuously monitors the DAC output level. When the power level is low, it increases the input signal gain to make it sound louder. At the same time, if a peaking signal is detected, it autonomously reduces the applied gain to avoid hard clipping. It ensures the maximum/consistent signal amplitude without producing audio clipping and speaker damage.
Realtek
