ASAHI KASEI [AK4124]
MS0288-E-01 2004/08
- 1 -





GENERAL DESCRIPTION
AK4124 is a stereo digital sample rate converter (SRC). The input sample rate ranges from 8kHz to
216kHz. The output sample rate is from 8kHz to 216kHz. By using the AK4124, the system can take very
simple configuration because the AK4124 has an internal PLL and does not need any master clock at
slave mode. Then the AK4124 is suitable for the application interfacing to different sample rates like
high-end Car Audio, DVD recorder, etc.


FEATURES
1. SRC
• Asynchronous Sample Rate Converter
• Input Sample Rate Range (fsi) : 8kHz ∼ 216kHz
• Output Sample Rate (fso) : 8kHz ∼ 216kHz
• Input to Output Sample Rate Ratio : 1/6 to 6
• THD+N : −130dB
• Dynamic Range : 140dB (A-weighted)
• I/F format : MSB justified, LSB justified and I
2
S compatible
• PLL for Internal Operation Clock
• Clock for Master mode : 128/192/256/384/512/768fsi, 128/192/256/384/512/768fso
• SRC Bypass mode
• Soft Mute Function
2. Power Supply
• AVDD, DVDD: 3.0 ∼ 3.6V (typ. 3.3V)
3. Ta = −40 ∼ 85°C
4. Package : 30pin VSOP

PLL
PDN
SMUTE
OLRCK
OBICK
SDTO
OMCLK
Serial
Audio
I/F
SRC
Serial
Audio
I/F
ILRCK
SDTI
IBICK
PLL1
PLL2
IDIF2 IDIF1 IDIF0 ODIF1 ODIF0
OBIT1
OBIT0
UNLOCK IMCLK
AVDD AVSS DVDD DVSS
CMODE2 CMODE1 CMODE0
PLL0
DITHER


192kHz / 24Bit High Performance Asynchronous SRC
AK4124