[AK4145]
= Preliminary =
AK4145
Digital BTSC Stereo Encoder
GENERAL DESCRIPTION
The AK4145 is a BTSC Encoder with D/A Converter, which is optimized for Digital AV application. The
AK4145 achieves high audio performance using the digital BTSC encoding architecture requires no
alignment of external parts. The AK4145 supports major audio data formats (MSB justified, I
2
S, TDM) to
interface with usual DSP. Therefore, the AK4145 is suitable for the systems such as Digital STB/TV,
digital recorder.
FEATURES
Alignment Free Digital BTSC Stereo Encoding
Base band Composite Audio Output (Mono/Stereo)
Digital Volume for Composite Audio Output
Digital De-emphasis filter (32k/44.1k/48kHz)
Stereo Digital Volume Control for Audio Input Data
Soft Mute
Sampling Rate (fs): 32k/44.1k/48kHz
Master Clock: 256fs/384fs/512fs/768fs
I/F format: 24-Bit MSB justified, 24/20/16-Bit LSB justified or I
2
S
Control: Standalone/I
2
C-bus Selectable
Video Input for Pilot Synchronization
S/(N+D): 0.01%
S/N: 82dB
Channel Separation: 47dB
Power Supply: 1.7V ~ 1.9V, 2.7 ~ 3.6V
Ta: -20 ~ 85°C
P/S
PDN
MCLK
FILT
TVDD
DVDD
FS1/SDA
DIF/SCL
µP
Interface
PLL
VSS
VCOM
AVDD
LRCK
BICK
SDTI
Audio
Data
Interface
De-emphasis,
DVOL,
Stereo Matrix
Digital
BTSC
Encoder
DATT
DAC
CA
Sync
separator
CV/27M
Rev. 0.3-PB
-1-
2007/12
AKM [ ASAHI KASEI MICROSYSTEMS ]
