AK4646_11 Datasheet, PDF (1/81 Pages) Asahi Kasei Microsystems – Stereo CODEC with MIC/SPK-AMP

[AK4646]
AK4646
Stereo CODEC with MIC/SPK-AMP
GENERAL DESCRIPTION
The AK4646 features a stereo CODEC with a built-in Microphone-Amplifier and Speaker-Amplifier. Input
circuits include a Microphone-Amplifier and an ALC (Auto Level Control) circuit, and Output circuits
include a Speaker-Amplifier. These circuits are suitable for portable application with recording/playback
function. The AK4646 is available in a small 32pin QFN (5mmx5mm: AK4646EN, 4mmx4mm:
AK4646EZ), utilizing less board space than competitive offerings.
FEATURES
1. Recording Function
• Stereo Mic Input (Full-differential or Single-ended)
• Stereo Line Input
• MIC Amplifier (+32dB/+29dB/+26dB/+23dB/+20dB/+17dB/+10dB/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
• 5 Band Notch Filter
• Stereo Separation Emphasis
2. Playback Function
• Digital De-emphasis Filter (tc=50/15μs, fs=32kHz, 44.1kHz, 48kHz)
• 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 Speaker-Amp
- S/(N+D): 60dB@150mW, S/N: 90dB
- BTL Output
- Available for both Dynamic and Piezo Speaker
- Output Power: 400mW@8Ω (SVDD=3.3V)
• Analog Mixing: Mono Input
3. Power Management
4. Master Clock:
(1) PLL Mode
• Frequencies:
12MHz, 13.5MHz, 24MHz, 27MHz (MCKI pin)
1fs (LRCK pin)
32fs or 64fs (BICK pin)
(2) External Clock Mode
• Frequencies: 256fs, 512fs or 1024fs (MCKI pin)
5. Output Master Clock Frequencies: 32fs/64fs/128fs/256fs
MS0557-E-05
-1-
2011/01