AK4651 Datasheet, PDF (1/66 Pages) Asahi Kasei Microsystems – 16Bit ΔΣ CODEC with MIC/HP/SPK-AMP

ASAHI KASEI
[AK4651]
AK4651
16Bit ∆Σ CODEC with MIC/HP/SPK-AMP
GENERAL DESCRIPTION
The AK4651 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 AK4651 is connected with
AC’97 controller (CPU) via AC-Link. The AK4651 is available in a very small 57pin BGA, utilizing less
board space than competitive offerings.
FEATURES
1. Resolution: 16bits
2. Recording Function
• Mono Input (Single-ended or Differential Input)
• 2 to 1 Selector (Internal and External MIC)
• MIC Power: 2 outputs (Internal and External MIC)
• 1^st MIC Amplifier: +20dB or 0dB
• 2^nd Amplifier with ALC: +27.5dB ∼ −8dB, 0.5dB Step
• ADC Performance (@MIC-Amp=+20dB, Single-ended):
S/(N+D): 79dB, DR, S/N: 83dB
• MIC Detection
3. Playback Function
• Digital De-emphasis Filter (tc=50/15µs, fs=32kHz, 44.1kHz, 48kHz)
• Digital Volume (0dB ∼ −63dB, 0.5dB Step, Mute)
• Bass Boost
• Mono Output
- Full-differential Output
- S/(N+D): 85dB, S/N: 95dB
- Analog Volume: +6dB ∼ −15dB, 3dB Step
• Headphone-Amp
- Output Power: 40mW@16Ω (HVDD=3.3V)
- S/(N+D): 60dB@10mW, S/N: 90dB
• Headphone Jack Detection
• Mono Speaker-Amp
- Output Power: 300mW@8Ω (HVDD=3.3V, ALC2=OFF)
- S/(N+D): 55dB@110mW, S/N: 90dB
- BTL Output
- ALC (Auto Level Control) circuit
• Mono Beep Input
• AUX Input
- Full-differential Input
- Analog Volume: +12dB ∼ −34.5dB, 1.5dB Step, Mute
• Stereo Line Input
- Single-ended Input
- Analog Volume: +12dB ∼ −34.5dB, 1.5dB Step, Mute
MS0503-E-00
-1-
2006/04