Class-D Amps Squash Smart-Home Audio Design Challenges

Texas Instruments introduces three digital-input Class-D audio amplifiers that claim to deliver high-resolution audio in more smart-home and voice-enabled applications. By combining first-of-its-kind integration, real-time protection and new modulation schemes, the devices allow designers to reduce board space and overall bill of material (BOM) cost.

 

TAS2770 15-W audio amplifier increases loudness and audio quality while simplifying voice capture.

Sponsored by Anritsu Company

New VNA technologies enable mmWave broadband testing to 220 GHz, helping researchers and engineers to overcome test challenges and simplify mmWave testing.

Application development in the mmWave frequencies is growing. Broadband testing over hundreds of GHz of bandwidth is subject to repeatability/accuracy deficits, and engineers demand solutions to help overcome challenges and simplify mmWave testing.
  • Efficiently drive high-output peak power into small loudspeakers: As the first wide-supply I/V sense amplifier, the TAS2770 offers state-of-the art, real-time speaker protection when paired with TI Smart Amp algorithms. The amplifier monitors loudspeaker behavior and increases loudness while improving audio quality in applications requiring small speakers – all without changing industrial design.
  • Add voice command without changing audio design: The TAS2770 is the industry's first audio front end (AFE) that combines a digital microphone input with a powerful I/V sense amplifier. The device captures voice and ambient acoustic information for echo cancellation or noise reduction in voice-enabled applications.
  • Prevent audio clipping and brownout: The TAS2770 monitors battery voltage and automatically decreases gain when audio signals exceed a set threshold, helping designers avoid clipping and extend playback time through end-of-charge battery conditions without degrading sound quality.

 

TAS5825M audio amplifier delivers 192-kHz audio processing in smart speakers.

  • Enhance and protect system audio quality: Designers can achieve high-resolution audio with minimal engineering effort due to the device's 192-kHz input sampling frequency and flexible, integrated processing flows. Additionally, the TAS5825M provides bass enhancement and thermal protection for the speaker.
  • Simplify echo cancellation: The TAS5825M's dedicated serial audio interface data output provides ambient sound information to the applications processor.
  • Lower power consumption: Engineers can reduce idle-power losses and thermal dissipation without degrading sound quality with the TAS5825M's proprietary hybrid-mode modulation scheme.

 

TAS3251 increases sound quality and system reliability.

  • Combine high performance and integration: The TAS3251 is the first integrated digital-input solution to support the highest output power and performance at 2x175 W, all in one single package.
  • Achieve reliable, high-power audio: Enable up to 96-kHz flexible processing and self-protection features including cycle-by-cycle current limit and DC speaker protection with the TAS3251.

 

Packages & Pricing

 

 

Of course, datasheets are available for all three devices.

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