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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.

Overview

ASAHI KASEI [AK4140] AK4140 Digital BTSC Decoder GENERAL.

Key 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 ju.