Description

The STA304 Digital Audio Processor is a single chip device implementing end-to-end digital solution for audio applications. In conjunction with the STA500 power bridge, it provides a full digital DSP-to-power high-quality chain with no need for audio Digital-to-Analog converters between the DSP and power stage.

Specifications and features

- End-to-end digital audio integrated solution

- DSP Functions:

• Digital volume control
• Soft mute
• Bass and treble control
• Parametric EQ per channel
• Bass management for subwoofer
• Auto mute on zero input detection

- 4+1 direct digital amplification (DDX™) output channels

- 6 programmable serial output interface channels (by default I2S)

- 4 programmable serial input interface channels (by default I2S)

- Stereo S/PDIF input interface

- Intel AC97 link (rev. 2.1) input interface for audio and control

- On-chip automatic input sampling frequency detection

- 100 dB SNR sample rate converter (1KHz sinusoidal input)

- I2C control bus

- Low power 3.3V CMOS technology

- Embedded PLL for internal clock generation (1024x48 kHz = 49.152 MHz)

- 24.576 MHz external input clock or built-in industry standard XTAL oscillator.

Application Scenarios

The STA304 Digital Audio Processor can be used in various audio applications such as:

• Home theater systems
• Car audio systems
• Professional audio equipment
• Multimedia devices

Comparison

Advantages:

• Provides end-to-end digital audio solution
• Eliminates the need for audio Digital-to-Analog converters
• High-quality DSP-to-power chain
• Supports various audio interfaces
• Low power consumption

Disadvantages:

• Requires additional power bridge (STA500)
• May be complex to configure and program