ASAHI KASEI
[AK4140]
AK4140
Digital BTSC Decoder
GENERAL DESCRIPTION
The AK4140 is a BTSC decoder, which is optimized for Digital STB/TV application. The AK4140 achieves
high audio performance using original demodulation techniques for 4.5MHz inter-carrier sound, and the
digital BTSC decoding architecture using digital dbx-TV
®
technology licensed from THAT Corporation
requires no alignment of external parts. The AK4140 supports major audio data formats (MSB justified,
I
2
S, TDM) to interface with usual DSP. Therefore, the AK4140 is suitable for the systems such as Digital
STB/TV, AV recorder etc.
The dbx-TV
®
brand identifies a range of technology solutions for digital TV-audio decoding developed and
licensed by THAT Corporation. The dbx-TV provides high performance solutions with high quality sound.
FEATURES
Capable of receiving 4.5MHz intercarrier sound and FM demodulation
Alignment Free Digital BTSC decoding (Mono/Stereo/SAP)
Programmable pilot/SAP/noise detection threshold
Automatic return to mono dependant on pilot/noise level
Mono/Stereo/SAP selectable output
Digital volume control
Soft Mute function
Digital HPF for DC-Offset cancel
Sampling Rate (fs): 32k/44.1k/48kHz
Master Clock: 256fs/384fs /512fs/768fs
Audio Interface: Master or Slave Mode
Output format: 16bit MSB justified / I
2
S or TDM
S/(N+D): 0.13%
S/N:
73dB
Power Supply: 2.7 ~ 3.6V
Ta: -20 ~ 85°C
VDD
VSS
PDN
MCLK
FILT
Clock Divider
FM
Demodulator
BTSC
Decoder
Serial I/O
Interface
TDMIN
LRCK
SIF
SCLK
SDTO
Control
Register
CAD1 CAD0
SCL
SDA INT0 INT1
.
MS0547-E-01
-1-
2007/03
AKM [ ASAHI KASEI MICROSYSTEMS ]
