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

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