STA309A

Audio Special Purpose Overview

The STA309A is a single-chip digital audio processor designed for multi-channel applications, providing output capabilities for DDX® direct digital amplification. It supports high-quality, high-efficiency all-digital amplification when paired with DDX® power devices. The device accepts various digital formats including 6.1/7.1-channel, 192 kHz, 24-bit DVD-audio, and DSD/SACD. Internal processing operates at a 192 kHz sample rate with 24-bit to 36-bit precision. It features eight channels of 24-bit DDX® output, enabling flexible configurations such as 5.1 surround sound or simultaneous 5.1 and 2-channel downmix outputs.

Audio Special Purpose Feature Summary

• Supports 6.1/7.1-channel inputs and 192 kHz, 24-bit DVD-audio/DSD/SACD formats
• Provides eight channels of 24-bit DDX® direct digital amplification outputs
• Includes full DSP capabilities: pre/post EQ, tone control, compression, and limiters
• Features Automode™ with 32 preset EQ curves and automatic loudness control

Audio Special Purpose Applications

• Multi-channel home theater systems requiring 5.1 or 7.1 channel processing
• High-fidelity audio systems utilizing DDX® power stages for efficient amplification
• Audio setups requiring simultaneous 5.1 and 2-channel downmix outputs

Audio Special Purpose Part Context

The STA309A belongs to STMicroelectronics' family of analog and digital audio processors. It is specifically engineered to interface with DDX® power devices, forming a complete digital amplification solution. This integration allows for high-efficiency audio delivery while maintaining signal integrity through direct digital processing without intermediate DAC stages in the main signal path.

Audio Special Purpose Replacement Considerations

The STA309A is listed as obsolete. Designers should consult current STMicroelectronics product portfolios for alternative digital audio processors that support similar multi-channel DDX® interfaces and DSP feature sets.