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STA309BTR

Multichannel digital audio processor with FFX®

STMicroelectronics 

STA309B

Multichannel digital audio processor with FFX®

Preliminary data

Features

■ 8 channels of 24-bit FFX®

■ >100 dB SNR and dynamic range

■ Selectable 32 kH-192 kHz input sampling rates

■ 6 channels of DSD/SACD and PDM input

■ Digital gain/attenuation +58 dB to -100 dB in

0.5 dB steps

■ Advanced “pop-free” operation

■ Digital “pop-free” operation for single-ended

mode

■ 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 or anti-clipping

modes

■ AutoModes

– 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

– AM frequency automatic output PWM

frequency shifting

– 8 preset crossover filters

■ Individual channel and master soft/hard mute

VFQFPN-56

■ Automatic zero-detect and invalid input mute

■ Automatic amplifier power-down on clock loss

■ 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/FFX channel

■ Selectable per-channel FFX damped ternary or

binary PWM output

■ Max power correction for lower full-power THD

■ Variable per-channel FFX output delay control

■ 192 kHz internal processing sampling rate,

24-bit to 36-bit precision

Description

The STA309B is a single-chip solution for digital

audio processing and control in multichannel

applications and provides output capabilities for

FFX (full flexible amplification). In conjunction with

an FFX power device, it provides high-quality,

high-efficiency, all-digital amplification. The device

is extremely versatile, allowing for input of most

digital formats including 6.1/7.1-channel and

192 kHz, 24-bit DVD-audio, DSD/SACD and PDM

for MEMS microphone inputs. In the 5.1

application, the additional 2 channels can be used

for audio line-out or headphone drive. In speaker

mode, with 8 channel outputs in parallel, the

STA309B can deliver 1 W (maximum).

Table 1. Device summary

Order code

Package

Packaging

STA309B

STA309BTR

VFQFPN56

VFQFPN56

Tube

Tape and reel

January 2012

Doc ID 022570 Rev 2

1/66

www.st.com

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