STMicroelectronics STA350BWTR

STA350BWTR Product Synopsis from STMicroelectronics

The STA350BWTR from STMicroelectronics is a fully integrated digital audio processor designed for high-efficiency sound systems, particularly in applications where space, flexibility, and performance are critical. Packaged in a PowerSSO-36 with exposed pad down (EPD), this device supports both 2-channel stereo and 2.1-channel modes, making it suitable for a variety of consumer and professional audio equipment. The STA350BWTR is part of ST’s Sound Terminal® family, renowned for advanced signal processing and robust output capabilities.

Highlighted Attributes of the STA350BWTR

At the heart of the STA350BWTR are features engineered to simplify audio system design and enhance performance. Key highlights include:

Wide supply voltage range from 5V to 26V, with an absolute maximum of 30V

1-channel digital audio system supporting up to 2 x 50 W into 6 Ω and alternative power outputs for different load configurations

Dedicated bass (LFE) processing and preset crossover filters, enabling tailored sound reproduction

Up to eight user-programmable biquads per channel for extensive audio filtering and equalization capability

Advanced dynamic range compression (DRC), anti-clipping algorithms, and nighttime listening mode presets

Selectable sampling rates (32-192 kHz) and internal processing at 96 kHz, with quantization error noise shaping for reduced distortion

Individual channel and master gain/attenuation options, with soft/hard mute functions and programmable volume step resolution (0.125 dB/step)

Comprehensive protection features including thermal overload, short-circuit detection, and invalid input detection

Power and Heat Ratings of the STA350BWTR

Reliable operation across diverse system environments makes STA350BWTR a strong choice for demanding audio applications. The recommended operating conditions specify a voltage range of 5V to 26V, ambient temperature from -20°C to 85°C, and moisture sensitivity rated at MSL 3 (168 hours). Electrical specifications detail separate requirements for both the digital and power sections, ensuring predictable integration alongside microcontrollers, amplifiers, and power management subsystems. Thermal overload protection safeguards the device during high-power operation, notably when installed in compact or poorly ventilated enclosures.

Audio Handling Features of STA350BWTR

The STA350BWTR is distinguished by its powerful audio processing ecosystem. The device embeds EQ-DRC for dynamic range control based on filtered signals, and includes 15 preset crossover filters for bass management. Dedicated LFE channel control allows for precise bass boosting in home theater and automotive audio setups. Advanced biquad filtering enables customizable EQ curves, managed through three coefficient banks and programmable via the I2C interface. Additionally, selectable high-pass filtering ensures DC blocking, and integrated tone/de-emphasis controls support diverse source material.

Interface Options for Communication and Control in the STA350BWTR

Engineers will appreciate the range of connectivity options provided by the STA350BWTR. The device features a standard I2C interface with selectable device address for communication and control, facilitating seamless integration with host microcontrollers and system-level digital audio pipelines. Input/output channel mapping offers flexibility in system architecture, including support for various serial audio input formats. Special attention is given to fail-safe operation, with features such as automatic zero-detect mute, invalid input-detect mute, and clock loss detection for binary output modes.

Output Variants and Usage Examples for STA350BWTR

The STA350BWTR supports multiple output topologies to accommodate a wide variety of audio system designs:

Stereo mode: 2 channels of ternary PWM, delivering 2 x 50 W into 6 Ω at 25V

1 mode: 2 x 18 W (4 Ω) plus 1 x 40 W (8 Ω) for left, right, and subwoofer channels

Mono-BTL mode: 1 x 90 W into 3 Ω at 24.5V for single-channel high-power usage

Stereo mode plus dedicated lineout: combining 2 x 50W with PWM-driven lineout

These output configurations allow the STA350BWTR to be used in high-fidelity speaker systems, compact soundbars, automotive audio, and advanced multimedia centers, where flexible channel remapping and dynamic range management are crucial.

Package Specifications and Installation Methods for STA350BWTR

The STA350BWTR comes in a PowerSSO-36 package (7.50 mm width, 0.295” body) with an exposed pad down for improved thermal dissipation. Surface-mount compatibility accelerates assembly in volume production, while the package design supports robust performance under heavy load conditions. Pin definitions and thermal properties are fully documented for streamlined PCB layout and system integration.

Alternative or Substitute Models for STA350BWTR

When evaluating supply continuity or alternate sourcing, engineers should consider devices fully compatible with the STA350BWTR. Notably, STMicroelectronics’ STA339BW and STA339BWS are compatible options, offering similar control and audio processing capabilities. Selection between these models should consider desired channel count, processing features, and lineout configuration requirements, as detailed in their respective datasheets.

Environmental Standards and Regulatory Compliance of STA350BWTR

Meeting global standards, the STA350BWTR is RoHS3 compliant and classified under ECCN EAR99, with REACH status “unaffected.” These credentials assure support for designs destined for global distribution, including electronics with stringent environmental demands. Moisture sensitivity and recommended reflow protocols are provided for reliability in manufacturing.

Conclusion

: STA350BWTR for Modern Audio System Designs

The STA350BWTR by STMicroelectronics stands out as a feature-rich, fully integrated audio processor for advanced, multi-channel sound systems. Its flexibility in power output, superior audio processing features, robust protection mechanisms, and broad compliance profile make it an invaluable component for engineers and procurement professionals targeting high-performance audio solutions. Whether integrating into next-generation consumer electronics or professional audio equipment, the STA350BWTR delivers the technical depth and design versatility required for today’s competitive markets.