AK4537

ASAHI KASEI [AK4537] AK4537 16-Bit ∆Σ Stereo CODEC with MIC/HP/SPK-AMP GENERAL DESCRIPTION The AK4537 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 AK4537 is available in a 52-QFN, utilizing less board space than competitive offerings. FEATURES 1. Resolution : 16bits 2. Recording Function Stereo Mic Input Stereo Line Input 1st MIC Amplifier : +20dB or 0dB 2nd Amplifier with ALC -8dB ∼ +27.5dB, 0.5dB Step (MIC input) -23.5dB ∼ +12dB, 0.5dB Step (LINE input) ADC Performance : S/(N+D) : 79dB, DR, S/N : 83dB (MIC input) S/(N+D) : 88dB, DR, S/N : 91dB (LINE input) 3. Playback Function Digital De-emphasis Filter (tc=50/15µs, fs=32kHz, 44.1kHz, 48kHz) Digital Volume (0dB ∼ -127dB, 0.5dB Step, Mute) Stereo Headphone-Amp - S/(N+D) : 70dB, S/N : 90dB - Output Power : 15mW@16Ω (HVDD=3.3V) - Click Noise Free at Power ON/OFF Mono Speaker-Amp with ALC - S/(N+D) : 64dB@150mW, S/N : 90dB - BTL Output - Output Power : 300mW@8Ω, THD+N=10% (HVDD=3.3V) Mono and Stereo Beep Inputs Mono Line Output - Differential Output - Performance : S/(N+D) : 89dB, S/N : 95dB Stereo Line Output - Performance : S/(N+D) : 88dB, S/N : 92dB 4. Power Management 5. Master Clock (1) PLL Mode Frequencies : 11.2896MHz, 12MHz and 12.288MHz Input Level : CMOS (2) External C...