描述 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).

特性 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
AutoModes5-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
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