This document describes the features and characteristics of the STA309B multichannel digital audio processor, including 8 channels of 24-bit FFX®, >100 dB SNR and dynamic range, selectable 32 kHz-192 kHz input sampling rates, 6 channels of DSD/SACD and PDM input, etc.
The STA309B is a single-chip digital audio processor designed for multichannel applications, providing output capabilities for FFX (Full Flexible Amplification). It supports high-quality, high-efficiency all-digital amplification when used with an FFX power device. The device handles various digital input formats, including 6.1/7.1-channel and 192 kHz, 24-bit DVD-audio, DSD/SACD, and PDM for MEMS microphone inputs.
| Number of FFX channels | 8 channels |
|---|---|
| Signal-to-noise ratio | >100 dB |
| Input sampling rates | 32 kHz to 192 kHz |
| Digital gain/attenuation range | +58 dB to -100 dB |
| Internal processing sampling rate | 192 kHz |
| Package type | VFQFPN-56 |
In speaker mode with 8 channel outputs in parallel, the device can deliver 1 W maximum.
Yes, it provides input for 6 channels of DSD/SACD and PDM.
The digital gain/attenuation is adjustable in 0.5 dB steps.