描述 Description

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, I2S, 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 I2S
Control: Standalone/I2C-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

特性 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 I2S
Control: Standalone/I2C-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