
ASAHI KASEI 
[AK4343] 
MS0478-E-01 
2006/10 
- 1 - 
GENERAL DESCRIPTION 
The AK4343 is a stereo DAC with a built-in Headphone-Amplifier, Receiver-Amplifier and 1.2W output 
Speaker-Amplifier. The AK4343 features analog mixing circuits and PLL that allows easy interfacing in 
mobile phone and portable A/V player designs. The AK4343 is available in a 32pin QFN, utilizing less 
board space than competitive offerings. 
FEATURES 
1. Playback Function 
 Digital De-emphasis Filter (tc=50/15
μ
s, 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 
 Programmable EQ 
 Stereo Line Output
- Performance: S/(N+D): 88dB, S/N: 92dB
 Mono Receiver-Amp 
- BTL Output 
- Output Power: 30mW@32
 (AVDD=3.3V) 
 Stereo Headphone-Amp 
- S/(N+D): 70dB@7.5mW, S/N: 90dB 
- Output Power: 70mW@16
 (HVDD=5V), 62mW@16
 (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@8
 (HVDD=5V), 400mW@8
 (HVDD=3.3V) 
3.0Vrms@50
 (HVDD=5V) 
 Analog Mixing: 
- 3 Stereo Input 
- Gain Amplifier (+32dB/+26dB/+20dB or 0dB) 
2. Power Management 
3. 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) 
(2) External Clock Mode
 Frequencies: 256fs, 512fs or 1024fs (MCKI pin) 
4. Output Master Clock Frequencies: 32fs/64fs/128fs/256fs 
5. Sampling Rate: 
 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 
 PLL Master Mode: 
8kHz, 11.025kHz, 12kHz, 16kHz, 22.05kHz, 24kHz, 32kHz, 44.1kHz, 48kHz 
Stereo DAC with HP/RCV/SPK-AMP 
AK4343