ASAHI KASEI [AK4120]

MS0134-E-00 2002/1
- 1 -




GENERAL DESCRIPTION
The AK4120 is a stereo asynchronous sample rate converter. The input sample rate range is from 8kHz
to 48kHz. The output sample rate is fixed at 32kHz, 44.1kHz, 48kHz or 96kHz. AK4120 includes a
digital mixer and digital volume control. Applications for this device include pro audio mastering,
consumer format conversion and desktop audio production and playback.

FEATURES
o Stereo Asynchronous Sample Rate Converter
o Digital Mixer
o Digital Volume
o Input Sample Rate Range (FSI): 8kHz to 48kHz
o Output Sample Rate (FSO): 32kHz, 44.1kHz, 48kHz and 96kHz
o Input to Output Sample Rate Ratio: FSO/FSI = 0.667 to 6
o THD+N: –113dB at 1kHz input
o I/F format: MSB justified (20bit), LSB justified (16bit/20bit), I2S
o Master clock: 256/512fs
o 3-wire Serial or I2C Bus µP I/F for mode setting
o Power Supply: 2.7 to 3.6V




Sample Rate Converter with Mixer and Volume
AK4120





Input#1
Audio
I/F
Sample
Rate
Converter


Input#2
Audio
I/F

Output
Audio
I/F
Volume#1 ILRCK1
IBICK1
SDTI1
ILRCK2
IBICK2
SDTI2
IMCLK1
OLRCK
OBICK
SDTO
OMCLK
VDD
VSS
I2C PDN
I2MODE OMODE CSN/CAD1 CCLK/SDL CDTI/SDA
I2S
IMCLK2
TEST
µ P I/F
CAD0
Volume#2