Features

● 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

Description

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 8channel outputs in parallel, the STA309A can deliver more than 1 W.