AK4538

ASAHI KASEI [AK4538] AK4538 16Bit ∆Σ CODEC with MIC/HP/SPK-AMP GENERAL DESCRIPTION The AK4538 targeted at PDA and other low-power, small size applications. It features a 16-bit 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 AK4538 is available in a 52-QFN, utilizing less board space than competitive offerings. FEATURES 1. Resolution : 16bits 2. Recording Function 1ch Mono Input 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) Stereo Line Output - Performance : S/(N+D) : 88dB, S/N : 92dB Headphone-Amp - S/(N+D) : 70dB, S/N : 90dB - Output Power : 15mW@16Ω (HVDD=3.3V) Mono Speaker-Amp with ALC - S/(N+D) : 64dB, S/N : 90dB - BTL Output - Output Power : 300mW@8Ω (HVDD=3.3V) Mono and Stereo Beep Inputs AUX Input Mono Output 4. Power Management 5. Master Clock (1) PLL Mode Frequencies : 11.2896MHz, 12MHz and 12.288MHz Input Level : CMOS (2) External Clock Mode Frequencies : 1.792MHz ∼ 12.288MHz 6. Output Master Clock Frequencies : 32fs/64fs/128fs/256fs 7. Sampling Rate (1) PLL Mode 8kHz, 11.025kHz, 16kHz, 22.05kHz, 24kHz, 32kHz, 44.1kHz, 48kHz (2) External Clock Mode 7kHz ∼ 48kHz 8. Control mode...