AK4649 Datasheet, PDF (1/96 Pages) Asahi Kasei Microsystems – 24bit Stereo CODEC with MIC/SPK-AMP

[AK4649]
AK4649
24bit Stereo CODEC with MIC/SPK-AMP
GENERAL DESCRIPTION
The AK4649 features a stereo CODEC with a built-in Microphone-Amplifier and Speaker-Amplifier. Input
circuits include a Microphone-Amplifier and an ALC (Automatic Level Control) circuit, and Output circuits
include a Speaker-Amplifier. These circuits are suitable for portable application with recording/playback
function. The AK4649 is available in a 29pin CSP (3x3.3mm 0.5mm pitch), utilizing less board space than
competitive offerings.
FEATURES
1. Recording Function
• Stereo Single-ended input with two Selector
• MIC Amplifier
(+29dB/+26dB/+23dB/+20dB/+16dB/+12dB/+9dB/+6dB/+3dB/0dB)
• Digital ALC (Automatic Level Control)
- Setting Range: +36dB ∼ −54dB, 0.375dB Step
- Noise Suppression
• ADC Performance: S/(N+D): 80dB, DR, S/N: 89dB (MIC-Amp=+20dB, AVDD=3.3V)
S/(N+D): 80dB, DR, S/N: 100dB (MIC-Amp=0dB, AVDD=3.3V)
• Wind-noise Reduction Filter
• 5 Band Notch Filter
• Stereo Separation Emphasis
• Digital MIC Interface
2. Playback Function
• Digital De-emphasis Filter (tc=50/15μs, fs=32kHz, 44.1kHz, 48kHz)
• Digital ALC (Automatic Level Control)
- Setting Range: +36dB ∼ −54dB, 0.375dB Step
- Noise Suppression
• Digital Volume Control:
- 0dB ∼ −18dB, 6dB Step & 256 Linear Step (+0dB ∼ - 48.13dB & Mute)
• Stereo Separation Emphasis
• Stereo Line Output
- S/(N+D): 87dB, S/N: 97dB
• Mono Speaker-Amp
- SPK-AMP Performance: S/(N+D): 60dB@150mW, S/N: 98dB
- BTL Output
- Output Power: 400mW@8Ω (SVDD=3.3V)
• Analog Mixing: Mono Input
3. Power Management
4. Master Clock:
(1) PLL Mode
• Frequencies: 11.2896MHz, 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
• PLL Slave Mode (LRCK pin): 7.35kHz ∼ 48kHz
• PLL Slave Mode (BICK pin): 7.35kHz ∼ 48kHz
• PLL Slave Mode (MCKI pin):
8kHz, 11.025kHz, 12kHz, 16kHz, 22.05kHz, 24kHz, 32kHz, 44.1kHz, 48kHz
MS1023-E-01
-1-
2010/08