ST STA309A13TR

The STA309A is a single chip solution for digital audio processing and control in multi-channel applications. It provides output capabilities for the derivative of DDX with a special operation (represented by the circled symbol). In conjunction with a DDX power device with a special symbol, the STA309A provides high-quality, high-efficiency, all digital amplification. The device is extremely versatile, allowing inputs of most digital formats including 6.1/7.1 - channel and 192 kHz, 24-bit DVD-audio, DSD/SACD. In 5.1 applications the additional 2 channels can be used for audio line-out or headphone drive. In speaker mode, with 8 channel outputs in parallel, the STA309A can deliver more than 1 W.

• 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 from +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 Π′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