SDAA206A March   2026  – May 2026 TAS2781

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Detailed Description
    1. 2.1 Typical Application Block Diagrams
    2. 2.2 Typical Schematics
      1. 2.2.1 External PVDDH Mode
      2. 2.2.2 Class-H Boosted Mode
      3. 2.2.3 TAS278X Power Modes
      4. 2.2.4 TAS278X Operational Modes
    3. 2.3 Layout Best Practices
      1. 2.3.1  DREG
      2. 2.3.2  IOVDD and IOVDD-SDW
      3. 2.3.3  AVDD
      4. 2.3.4  PVDDH
      5. 2.3.5  PVDDL
      6. 2.3.6  Class-D Outputs (OUTP and OUTN)
      7. 2.3.7  VSNSP and VSNSN
      8. 2.3.8  BSTP and BSTN
      9. 2.3.9  Ground Pins
      10. 2.3.10 Non-Soundwire Digital IO
      11. 2.3.11 Soundwire IO
  6. 3PCB Layers
  7. 4Summary
  8. 5References
  9. 6Revision History

1 Introduction

The following sections describe all critical design considerations for the TAS2781, TAS2783A, and TAS2785. These 3 devices share the same pinout, BOM Requirement, and Layout considerations. The only difference between these devices are DSP features, Soundwire (SNDW) SDCA support in TAS2783A and TAS2785, and of course, part number. For simplicity the name TAS278X is used as a catch-all term to refer to all three of these devices, TAS2781, TAS2783A, and TAS2785 unless it is necessary to differentiate the devices.