The AK4691 is a 16bit, 4ch ADC and 2ch DAC with Microphone-Amplifier, Headphone-Amplifier, and Speaker-Amplifier. The recording block corresponds to supports 4-channel inputs, and also has 3-input selector for Internal/External MIC and LINE, output power for Microphone, Pre-Amp, and ALC (Automatic Level Control) circuit. The playback bock has Lineout-Amplifier, Headphone-Amplifier, and Speaker-Amplifier. The AK4691 is suitable for portable applications such as built-in LCD. The AK4691 is available in a 57pin BGA, utilizing less board space than competitive offerings. FEATURES