STA333ML13TR

Audio Special Purpose Overview

The STA333ML13TR is a fully integrated, microless digital audio system from STMicroelectronics' Sound Terminal family. It combines a 24-bit DDX® digital class-D ternary modulator with a stereo power DMOS stage in a single die, eliminating the need for an external microcontroller. The device delivers 2 x 20 W into 8 Ω at VCC = 18 V with efficiency exceeding 90%. Key electrical parameters include a supply voltage range of 4.5 V to 20 V, 100-dB SNR and dynamic range, and THD+N of 0.05% at 1 W output. It operates within an ambient temperature range of 0°C to 70°C.

Audio Special Purpose Feature Summary

• Microless architecture: Single die embedding digital audio processing and high-efficiency power amplification without external MCU support.
• High performance: Delivers 2 x 20 W (into 8 Ω) with >90% peak efficiency, 100-dB SNR, and 0.05% THD+N.
• Direct Digital Amplification (DDX): Features 2 channels of 24-bit DDX® modulation with selectable 32 kHz to 48 kHz input sample rates.
• Integrated protection: Includes embedded thermal overload, short-circuit, overcurrent, and overvoltage protection with fault signaling via INT_LINE pin.

Audio Special Purpose Applications

• LCDs
• DVDs
• Cradles
• Digital speakers
• Wireless speaker cradles

Audio Special Purpose Procurement Notes

Verify that the specific order code matches the PowerSSO-36 EPD package with tape and reel packaging. Confirm the revision history status as production data. Ensure compatibility with I2S or left-justified serial audio interfaces by checking configuration pins FMT, ONSEL, and GAIN during design validation.

Audio Special Purpose Selection Notes

Select this component for applications requiring full digital audio streaming without microcontroller overhead. The device supports BTL stereo mode with filterless configuration options, though EMI mitigation strategies like ferrite beads are recommended for such setups. Verify PCB layout requirements for the exposed pad to manage thermal resistance effectively.

Audio Special Purpose Part Context

The STA333ML13TR belongs to the STA333ML series, part of the Sound Terminal family designed for cost-effective, low-power dissipation audio solutions. It utilizes Direct Digital Amplification technology to provide sound enrichment and high efficiency. The '13TR' suffix indicates the PowerSSO-36 EPD package type and tape and reel delivery format.

Audio Special Purpose Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.