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 8 channel outputs in parallel,

the STA309A can deliver more than 1 W.