Multichannel audio coder-decoder
GENERAL DESCRIPTION
The is a single-chip consisting of 4 plus 1 analog-to-digital converters and 6 digital-to-analog converters with signal processing features employing bitstream conversion techniques. The multichannel configuration makes the device eminently suitable for use in digital audio equipment which incorporates surround feature.
FEATURES
General
• 2.7 to 3.6 V power supply
• 5 V tolerant digital inputs
• 24-bit data path
• Selectable control: via L3-bus or I2C-bus microcontroller interface
• Supports sample frequency ranges for:
– Audio ADC: fs = 16 to 100 kHz
– Voice ADC: fs = 7 to 50 kHz
– Audio DAC: fs = 16 to 200 kHz.
• Separate power control for ADC and DAC
• ADC plus integrated high-pass filter to cancel DC offset
• Integrated digital filter plus DAC
• Slave mode only applications
• Easy application.
Multiple format data interface
• Audio interface supports standard I2S-bus, MSB-justified, LSB-justified and two multichannel formats
• Voice interface supports I2S-bus and mono channel formats.
Digital sound processing
• Control via L3-bus or I2C-bus:
– Channel independent digital logarithmic volume
– Digital de-emphasis for fs = 32, 44.1, 48 or 96 kHz
– Soft or quick mute
– Output signal polarity control.
Advanced audio configuration
• Inputs:
– 4 single-ended audio inputs 2 × stereo with programmable gain amplifiers
– 1 single-ended voice input
• Outputs:
– 6 differential audio outputs 3 × stereo
• DSD mode to support stereo DSD playback
• High linearity, wide dynamic range and low distortion
• DAC digital filter with selectable sharp or soft roll-off.
APPLICATIONS
• Excellently suitable for multichannel home audio-video application.