STA309B Datasheet PDF - STMicroelectronics
STMicroelectronics
Multichannel digital audio processor with FFX®
Description
The STA309B is a single-chip solution for digital audio processing and control in multichannel
applications and providesoutput 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).
FEATUREs
â– 8 channels of 24-bit FFX®
â– >100 dB SNR and dynamic range
â– Selectable 32 kH-192 kHz input sampling rates
â– 6 channels of DSD/SACD and PDM input
â– Digital gain/attenuation +58 dB to -100 dB in 0.5 dB steps
â– Advanced “pop-free” operation
â– Digital “pop-free” operation for single-ended mode
â– Soft volume update
â– Individual channel and master gain/attenuation plus channel trim (-10 dB to +10 dB)
â– Up to 10 independent 32-bit user programmable biquads (EQ) per channel
â– Bass/treble tone control
â– Pre- and post-EQ full 8-channel input mix on all 8 channels
â– Dual independent limiters/compressors
â– Dynamic range compression or anti-clipping modes
â– 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
â– Individual channel and master soft/hard mute
â– Automatic zero-detect and invalid input mute
â– Automatic amplifier power-down on clock loss
â– Advanced AM interference frequency switching and noise suppression modes
â– I2S output channel mapping function
â– Independent channel volume and DSP bypass
â– Channel mapping of any input to any processing/FFX channel
â– Selectable per-channel FFX damped ternary or binary PWM output
â– Max power correction for lower full-power THD
â– Variable per-channel FFX output delay control
â– 192 kHz internal processing sampling rate, 24-bit to 36-bit precision
