ASAHI KASEI
[AK4643]
AK4643
Stereo CODEC with MIC/HP/RCV/SPK-AMP
GENERAL DESCRIPTION
The AK4643 is a stereo CODEC with a built-in Microphone-Amplifier, Headphone-Amplifier,
Receiver-Amplifier and 1.2W output Speaker-Amplifier. The AK4643 features analog mixing circuits and
PLL that allows easy interfacing in mobile phone and portable A/V player designs. The AK4643 is
available in a 32pin QFN, utilizing less board space than competitive offerings.
FEATURES
1. Recording Function
•
3 Stereo Input Selector
•
Stereo Mic Input (Full-differential or Single-ended)
•
Stereo Line Input
•
MIC Amplifier (+32dB/+26dB/+20dB or 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
•
Stereo Separation Emphasis
•
Programmable EQ
2. Playback Function
•
Digital De-emphasis Filter (tc=50/15µs, fs=32kHz, 44.1kHz, 48kHz)
•
Bass Boost
•
Soft Mute
•
Digital Volume (+12dB
∼ −115.0dB,
0.5dB Step, Mute)
•
Digital ALC (Automatic Level Control)
(+36dB
∼ −54dB,
0.375dB Step, Mute)
•
Stereo Separation Emphasis
•
Programmble EQ
•
Stereo Line Output
- Performance: S/(N+D): 88dB, S/N: 92dB
•
Mono Receiver-Amp
- BTL Output
- Output Power: 30mW@32Ω (AVDD=3.3V)
•
Stereo Headphone-Amp
- S/(N+D): 70dB@7.5mW, S/N: 90dB
- Output Power: 70mW@16Ω (HVDD=5V), 62mW@16Ω (HVDD=3.3V)
- Pop Noise Free at Power ON/OFF
•
Mono Speaker-Amp
- S/(N+D): 50dB@240mW, S/N: 90dB
- BTL Output
- Availbable for both Dynamic and Piezo Speaker
- Output Power: 1.2W@8Ω (HVDD=5V), 400mW@8Ω (HVDD=3.3V)
3.0Vrms@50Ω (HVDD=5V)
•
Analog Mixing: 3 Stereo Input
3. Power Management
4. Master Clock:
(1) PLL Mode
•
Frequencies:
11.2896MHz, 12MHz, 12.288MHz, 13.5MHz, 24MHz, 27MHz (MCKI pin)
1fs (LRCK pin)
32fs or 64fs (BICK pin)
MS0476-E-01
-1-
2006/10
AKM [ ASAHI KASEI MICROSYSTEMS ]
