AK4644

ASAHI KASEI www.DataSheet4U.com [AK4644] AK4644 Stereo CODEC with MIC/HP/RCV-AMP GENERAL DESCRIPTION The AK4644 is a stereo CODEC with a built-in Microphone-Amplifier, Headphone-Amplifier and Receiver-Amplifier. The AK4644 features analog mixing circuits and PLL that allows easy interfacing in mobile phone and portable A/V player designs. The AK4644 is available in a 32pin QFN, utilizing less board space than competitive offerings. FEATURES 1. Recording Function 3 Stereo Input Selector Stereo Mic Input (Full-differential or Single-ended) Stereo Line Input MIC Amplifier (+32dB/+26dB/+20dB or 0dB) Digital ALC (Automatic Level Control) (+36dB ∼ −54dB, 0.375dB Step, Mute) ADC Performance: S/(N+D): 83dB, DR, S/N: 86dB (MIC-Amp=+20dB) S/(N+D): 88dB, DR, S/N: 95dB (MIC-Amp=0dB) Wind-noise Reduction Filter Stereo Separation Emphasis Programmable EQ 2. Playback Function Digital De-emphasis Filter (tc=50/15µs, fs=32kHz, 44.1kHz, 48kHz) Bass Boost Soft Mute Digital Volume (+12dB ∼ −115.0dB, 0.5dB Step, Mute) Digital ALC (Automatic Level Control) (+36dB ∼ −54dB, 0.375dB Step, Mute) Stereo Separation Emphasis Stereo Line Output - Performance: S/(N+D): 88dB, S/N: 92dB Mono Receiver-Amp - BTL Output - Output Power: 30mW@32Ω (AVDD=3.3V) Stereo Headphone-Amp - S/(N+D): [email protected], S/N: 90dB - Output Power: 70mW@16Ω (HVDD=5V), 62mW@16Ω (HVDD=3.3V) - Pop Noise Free at Power ON/OFF Analog Mixing: 3 Stereo Input 3. Power Management 4. Master Clock: (1) PLL ...