Multi-channel digital audio processor with DDX®

The STA309A is a single chip solution for digital audio processing and control in multi-channel applications. It provides output capabilities for DDX®. In conjunction with a DDX® power device, 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.

Key Features

  • Pre and post EQ full 8-channel input mix on all 8 channels
  • Bass/treble tone control
  • Dynamic range compression
  • Dual independent limiters/compressors
  • Individual channel and master soft/hard mute
  • Automode™:5-band graphic EQ32 preset EQ curves (rock, jazz, pop, etc.)Automatic volume controlled loudness5.1 to 2-channel downmixSimultaneous 5.1- and 2-channel downmix outputs3 preset volume curves2 preset anti-clipping modesPreset movie nighttime listening modePreset TV channel/commercial AGC mode5.1, 2.1 bass management configurations8 preset crossover filters
  • Automatic invalid input detect mute
  • Automatic zero-detect and invalid input mute
  • Advanced PopFree operation
  • I2 S output channel mapping function
  • Advanced AM interference frequency switching and noise suppression modes
  • Channel mapping of any input to any processing/DDX® channel
  • Independent channel volume and DSP bypass
  • Selectable per-channel DDX® damped ternary or binary PWM output
  • DC blocking selectable high-pass filter
  • Variable per channel DDX® output delay control
  • Max power correction for lower full-power THD
  • 192 kHz internal processing sample rate, 24-bit to 36-bit precision
  • Individual channel and master gain/attenuation plus channel trim (-10 dB to +10 dB)
  • Soft volume update
  • 8 channels of 24-bit DDX® (direct digital amplification)
  • Selectable 32 kHz - 192 kHz input sample rates
  • >100 dB of SNR and dynamic range
  • Digital gain/attenuation +58 dB to -100 dB in 0.5-dB steps
  • Up to 10 independent 32-bit user programmable biquads (EQ) per channel
  • 6 channels of DSD/SACD input


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型号 Package Packing Type Operating Temperature (°C) (min) Operating Temperature (°C) (max) Marketing Status Unit Price (US$) * Quantity ECCN (EU) ECCN (US) Country of Origin More info Order from ST Order from Distributors
STA309A13TR LQFP 64 10x10x1.4 Tape And Reel - - Active 3 1000 NEC EAR99 MALAYSIA MORE INFO 获取样片 Add to cart DISTRIBUTOR AVAILABILITY

(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office  or our Distributors


型号 Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
STA309A13TR ActiveLQFP 64 10x10x1.4IndustrialEcopack1 0 0

(**) The Material Declaration forms available on may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.