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Home » NEWEST Products » New by Manufacturer » STMicroelectronics » STM STA309A Digital Audio Processor
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STMicroelectronics STA309A
Multi-Channel Digital Audio Processor

STMicroelectronics' STA309A Multi-Channel Digital Audio Processor is a single chip solution for digital audio processing and control in multi-channel applications. The STA309A Multi-Channel Digital Audio Processor provides output capabilities for DDX®. In conjunction with a DDX® power device, STMicroelectronics' STA309A Multi-Channel Digital Audio Processor provides high-quality, high-efficiency, all digital amplification. The STA309A Multi-Channel Digital Audio Processor is extremely versatile, allowing inputs of most digital formats including 6.1/7.1-channel and 192 kHz, 24-bit DVD-audio, DSD/SACD.

  • 8 channels of 24-bit DDX® (direct digital amplification)
  • >100 dB of SNR and dynamic range
  • Selectable 32 kHz - 192 kHz input sample rates
    6 channels of DSD/SACD input
  • Digital gain/attenuation +58 dB to -100 dB in 0.5-dB steps
  • Soft volume update
  • Individual channel and master gain/attenuation plus channel trim (-10 dB to +10 dB)
  • Up to 10 independent 32-bit user programmable biquads (EQ) per channel
  • Bass/treble tone control
  • Pre and post EQ full 8-channel input mix on all 8 channels
  • Dual independent limiters/compressors
  • Dynamic range compression
  • Automode™:
5-band graphic EQ
32 preset EQ curves (rock, jazz, pop, etc.)
Automatic volume controlled loudness
5.1 to 2-channel downmix
Simultaneous 5.1- and 2-channel downmix outputs
3 preset volume curves
2 preset anti-clipping modes
Preset movie nighttime listening mode
Preset TV channel/commercial AGC mode
5.1, 2.1 bass management configurations
8 preset crossover filters

  • Individual channel and master soft/hard mute
  • Automatic zero-detect and invalid input mute
  • Automatic invalid input detect mute
  • Advanced PopFree operation
  • Advanced AM interference frequency switching and noise suppression modes
  • I2S output channel mapping function
  • Independent channel volume and DSP bypass
  • Channel mapping of any input to any processing/DDX® channel
  • DC blocking selectable high-pass filter
  • Selectable per-channel DDX® damped ternary or binary PWM output
  • Max power correction for lower full-power THD
  • Variable per channel DDX® output delay control
  • 192 kHz internal processing sample rate, 24-bit to 36-bit precision

Additional Resources

STA309A Product Info
Block Diagram
Block Diagram
Channel Signal Flow
Channel Signal Flow
  • STMicroelectronics
  • Semiconductors|Integrated Circuits|IC-Amplifier|IC-Audio