STA350BW

Audio Special Purpose Overview

The STA350BW is a fully integrated digital audio system from the Sound Terminal family, combining digital processing, amplifier control, and FFX power output. It supports I2S input with selectable sample rates of 32 to 192 kHz and operates on a 5 V to 26 V supply. The device features four configurable power output modes: stereo (2 x 50 W into 6 Ω), 2.1 channel (2 x 18 W + 1 x 40 W), stereo with line-out, or mono-BTL (1 x 90 W into 3 Ω). It includes up to 8 programmable biquads per channel, dual-band DRC, and achieves 100 dB SNR.

Audio Special Purpose Feature Summary

• FFX technology delivering 100 dB SNR and dynamic range
• Four flexible power configurations including stereo, 2.1, and mono-BTL
• Integrated DSP with up to 8 user-programmable biquads per channel
• I2C control interface with selectable device address

Audio Special Purpose Applications

• High-efficiency digital audio systems
• Pre-amplifier stages
• Smart home audio devices

Audio Special Purpose Procurement Notes

Verify the package type as PowerSSO-36 EPD and confirm the operating temperature range of -20°C to 85°C. Ensure the design accommodates the 5 V to 26 V supply voltage requirements. Check for compatibility with I2S data interfaces and I2C control protocols during integration.

Audio Special Purpose Selection Notes

Select this component when a single-chip solution for high-power digital amplification is required. Consider the specific output power needs against load impedance (e.g., 6 Ω vs 8 Ω) and supply voltage (up to 25 V). Evaluate the need for internal DSP features like EQ and DRC to reduce external component count.

Audio Special Purpose Part Context

The STA350BW belongs to the Sound Terminal family, which provides full digital audio streaming to speakers. It is based on ST's proprietary FFX processor, an evolution of ternary technology that supports various PWM modulation schemes for high efficiency and sound quality.

Audio Special Purpose Replacement Considerations

The datasheet confirms full compatibility with the STA339BW and STA339BWS models.