AK4140

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, I2S, 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 / I2S or TDM † S/(N+D): 0.13% † S/N: 73dB † Power Supply: 2.7 ~ 3.6V † Ta: -20 ~ 85°C VDD www.DataSheet4U.com VSS PDN MCLK FILT Clock Divider FM Demodulator BTSC Deco...