AK4955

[AK4955] AK4955 24bit Stereo CODEC with MIC/SPK/Cap-less VIDEO-AMP/ LDO & DSP GENERAL DESCRIPTION The AK4955 is a 24bit stereo CODEC with a microphone amplifier, speaker amplifier, video amplifier, LDO, and DSP. The input circuits include a microphone amplifier and the output circuits include a speaker amplifier. It is suitable for portable application with recording/playback function. A one channel composite In/Out video amplifier is also integrated. The internal charge pump generates a negative power eliminating the need for AC-coupling capacitors. The AK4955 is available in a small 36pin CSP (3.0mm x 3.1mm, 0.5mm pitch), saving mounting area on the board. FEATURES 1. Recording Functions Stereo Single-ended input with two Selectors MIC Amplifier (+24dB/+21dB/+18dB/+16dB/+14dB/+11dB/+8dB/+5dB/0dB) Digital ALC (Automatic Level Control) (Setting Range: +36dB ∼ −54dB, 0.375dB Step) ADC Performance: S/(N+D): 81dB, DR, S/N: 88dB (MIC-Amp=+18dB) S/(N+D): 82dB, DR, S/N: 9...