The STA381BW is an integrated solution embedding digital audio processing, digital amplification, FFXTMpower output stage, headphone and 2 Vrms line outputs. It is part of the Sound Terminal®family and provides full digital audio streaming from the source to the speaker, offering cost effectiveness, low power dissipation and sound enrichment.
The STA381BW input section consists of a flexible digital input serial audio interface, feeding the digital processing unit, and an analog 1 Vrms input for a seamless connection with pure analog sources. The serial audio data input interface supports many formats, including the popular IIS format.
The STA381BW is based on an FFXTM(Fully Flexible Amplification) processor, an STMicroelectronics proprietary technology. FFXTMis the evolution of the ST ternary technology: the advanced processor is available for ternary, binary, binary differential and phase shift PWM modulation. The STA381BW embeds the ternary, binary and binary differential implementations, a subset of the full capability of the FFXTMprocessor.
The STA381BW power section consists of four independent half-bridges. These can be configured via digital control to operate in different modes. A 2.1 channel setup can be implemented with two half-bridges (L/R) together with a single full-bridge (subwoofer). Alternatively, the 2.0 channel setup can be done with two full-bridges. When using this configuration an external amplifier for the SW channel also can be driven through the PWM output. The STA381BW is able to deliver 2 x 20 W (ternary) into an 8 Ω load at 18 V or 2 x 9 W (binary) into a 4 Ω load, plus 1 x 20 W (ternary) into an 8 Ω load at 18 V.
The STA381BW also provides a capless headphone out (with embedded negative charge pump), able to deliver up to 40 mW into a 32 Ω load or, alternatively, can be configured as a 2 Vrms line output.
The STA381BW digital processing unit includes up to 12 programmable biquads (EQs) allowing perfect sound equalization and offering advanced noise-shaping techniques. Moreover, the coefficient range ensures a great variety of filter shapes (low/high-pass, low/high shelf, peak, notch, band-pass). The equalization engine is fully compatible with the ST speaker compensation technology embedded into the APWorkbench suite. A state-of-the-art multi-band DRC, STCompressorTM, equalizes the system to provide active speaker protection with full audio quality preservation against sudden sound peaks. Moreover, STSpeakerSafeTM technology offers reliable speaker protection under any condition. The master clock can be from stable BICKI (64xfs, 50% duty cycle) or external XTI.
| 订购型号 | 产品状态 | 美金价格 | 数量 | 封装 | 包装形式 | 温度范围 | 材料声明 |
| STA381BW | Active | 1000 | VFQFPN 48 7X7X0.9 | Tube | -20 °C-150 °C | STA381BW | |
| STA381BWTR | Active | 1000 | VFQFPN 48 7X7X0.9 | Tape And Reel | -20 °C-150 °C | STA381BWTR |
| 下载 | 描述 | 版本 | 大小 |
| STA381BW | DS8580: Sound Terminal® 2.1-channel high-efficiency digital audio system | 1 | 2137KB |
| 下载 | 描述 | 版本 | 大小 |
| AN3340 | AN3340: Loudspeaker characterization and compensation | 1 | 3944KB |
| AN3984 | AN3984: IIR filter design equations for Sound Terminal® devices | 1 | 494KB |
| 下载 | 描述 | 版本 | 大小 |
| STA381BW | SoundTerminal STA381BW and STA381BWS | 1.0 | 1662KB |
