The AK4140 is a complete single-chip digital BTSC TV-sound decoder featuring high audio performance.  The AK4140 is utilizing a novel demodulation technique for 4.5MHz inter-carrier sound and digital domain BTSC decoding architecture presented by digital dbx-TV® technology*-1. These techniques offer that the AK4140 require no alignment of external parts. The AK4140 supports major audio data formats: MSB justified, I2S, and TDM mode interface. The AK4140 is available in a 24-pin VSOP package.

*1: About dbx-TV®

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.

·SIF Receiver
 Capable to receive 4.5MHz intercarrier sound and FM demodulation
 Alignment Free Digital BTSC decoding (Mono/Stereo/SAP)
·BTSC Decoding Functions
 Programmable pilot/SAP/noise detection threshold
 Automatic return to mono dependant on pilot/noise level
·Audio Functions
 Mono/Stereo/SAP selectable output
 Digital volume control
 Soft Mute
 Digital HPF for DC-Offset cancel
·Digital Audio Interface
 Sampling Rate: 32k/44.1k/48kHz
 Master Clock: 256fs/384fs/512fs/768fs
 Interface clocking mode: Selectable to Master or Slave
 Digital Audio Interface Format: 16bit MSB justified, I2S or TDM
·Audio Output Performance
 S/(N+D): 0.13%          S/N:73dB
·Power Supply:
 2.7 ∼ 3.6V
·Operation Temperature Range:
 -20 ∼ 85°C

 - Set-Top-Boxes
 - TVs
 - VCRs
 - DVD Recorders
 - Audio applications with TV tuner
 - Reference: Typical countries serving BTSC application
                    Brazil, Canada, Mexico, Taiwan, USA

AKD4140