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STA382BW

The STA382BW 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 STA382BW 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 STA382BW is based on an FFXTM(Fully Flexible Amplification) processor, proprietary technology from STMicroelectronics. FFXTMis the evolution of the ST ternary technology: the advanced processor is available for ternary, binary, binary differential and phase shift PWM modulation. The STA382BW embeds the ternary, binary and binary differential implementations, a subset of the full capability of the FFXTMprocessor.

The STA382BW 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 can also be driven through the PWM output. The STA382BW 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 STA382BW 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 STA382BW 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.

技术特性

• Wide-range supply voltage
  • 4.5 V to 26 V (operating range)
  • 30 V (absolute maximum rating)
• I²C control with selectable device address
• Embedded full IC protection
  • Manufacturing short-circuit protection (out vs. gnd, out vs. vcc, out vs. out)
  • Thermal protection
  • Overcurrent protection
  • Undervoltage protection
• 1 Vrms stereo analog input
• I2S interface, sampling rate 32 kHz ~ 192 kHz, with internal sampling frequency converter for fixed processing frequency
• Three output power stage configurations
  • 2.0 mode, L/R full bridges
  • 2.1 mode, L/R two half-bridges, subwoofer full bridge
  • 2.1 mode, L/R full bridges, PWM output for external subwoofer amplifier
• Driving load capabilities
  • 2 x 20 W into 8 Ω ternary modulation
  • 2 x 9 W into 4 Ω + 1 x 20 W into 8 Ω
• FFXTM100 dB dynamic range
• Fixed output PWM frequency at any input sampling frequency
• Embedded RMS meter for measuring real-time loudness
• Two analog outputs
  • Selectable headphone / line out driver with adjustable gain via external resistors
  • New F3XTManalog output
• New fully programmable noise-gating function
• Headphone
  • Embedded negative charge pump
  • Full capless output configuration
  • Driving load capabilities: 40 mW into 32 Ω
• Line out
  • 2 Vrms line output capability
• Up to 12 user-programmable biquads with noise-shaping technology
• Direct access to coefficients through I²C shadowing mechanism
• Fixed (88.2 kHz / 96 kHz) internal processing sampling rate
• Two independent DRCs configurable as a dual-band anticlipper or independent limiters/compressors (B2DRC)
• Digital gain/att +48 dB to -80 dB with 0.125 dB/step resolution
• Independent (fade-in, fade-out) soft volume update with programmable rate 48 ~ 1.5 dB/ms
• Bass/treble tones control
• Audio presets: 15 crossover filters, 5 anticlipping modes, nighttime listening mode
• STSpeakerSafeTMprotection circuitry
  • Pre- and post-processing DC blocking filters
  • Checksum engine for filter coefficients
  • PWM fault self-diagnosis
• STCompressorTMdual-band DRC

STA382BW 订购信息

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
STA382BW	Preview		1000	VFQFPN 48 7X7X0.9	Tube	0 °C-70 °C	STA382BW
STA382BWTR	Preview		1000	VFQFPN 48 7X7X0.9	Tape And Reel	0 °C-70 °C	STA382BWTR

DATASHEET

下载	描述	版本	大小
STA382BW	DS8884: Sound Terminal® 2.1-channel high-efficiency digital audio system	1	3232KB