AK4640

ASAHI KASEI [AK4640] AK4640 16-Bit ∆Σ CODEC with MIC/HP/SPK-AMP GENERAL DESCRIPTION The AK4640 targeted at PDA and other low-power, small size applications. It features a 16bit stereo CODEC with a built-in Microphone-Amplifier, Headphone-Amplifier and Speaker-Amplifier. Input circuits include a Microphone-Amplifier and an ALC (Auto Level Control) circuit. The AK4640 is available in a smaller 57pin BGA in addition to a 52pin QFN that has compatibility with the AK4534/8, utilizing less board space than competitive offerings. FEATURES 1. Resolution : 16bits 2. Recording Function Mono Input 2 to 1 Selector (Internal and External MIC) 1st MIC Amplifier : +20dB or 0dB 2nd Amplifier with ALC : +27.5dB ∼ −8dB, 0.5dB Step ADC Performance : S/(N+D) : 79dB, DR, S/N : 83dB 3. Playback Function Digital De-emphasis Filter (tc=50/15µs, fs=32kHz, 44.1kHz, 48kHz) Digital Volume (0dB ∼ −127dB, 0.5dB Step, Mute) Headphone-Amp - S/(N+D) : 70dB, S/N : 90dB - Ou...