[AK4121A]
AK4121A
Asynchronous Sample Rate Converter
GENERAL DESCRIPTION
The AK4121A is a stereo asynchronous sample rate converter. The input sample rate ranges from
8kHz to 96kHz. The output sample rate is 32kHz, 44.1kHz, 48kHz or 96kHz. Since the internal PLL
eliminates the need for a master clock in slave mode, the AK4121 simplifies the system design.
Therefore, the AK4121A is suitable for applications requiring multiple sample rates, such as Car Audio,
DVD recorders, and digital audio recording.
FEATURES
Stereo asynchronous sample rate converter
Input sample rate range (FSI): 8kHz to 96kHz
Output sample rate (FSO): 32kHz/44.1kHz/48kHz/96kHz
Input to output Sample rate ratio: FSO/FSI = 0.33 to 6
THD+N: –113dB
I/F format: MSB justified, LSB justified (24/20/16bit) and I
2
S
Clock for Master mode: 256/384/512/768fso
De-emphasis filter: 32kHz/44.1kHz/48kHz
SRC Bypass mode
Soft Mute function
Power Supply: VDD: 3.0 to 3.6V, TVDD: 3.0 to 5.5V (for input tolerant)
Ta: –40 to +85°C
PDN
DEM0
DEM1
SMUTE
TVDD
VDD
DVSS
(MCLK)
SDTI
ILRCK
IBICK
SDTO
OLRCK
OBICK
Serial
Audio
I/F
De-em
filter
Sample
Rate
Converter
soft
mute
Serial
Audio
I/F
CMODE2
AVSS
FILT
PLL
CMODE1
CMODE0
IDIF2
IDIF1
IDIF0
ODIF1
ODIF0
MS0337-E-02
-1-
2007/07
AKM [ ASAHI KASEI MICROSYSTEMS ]
