TAS2521 Evaluation Module


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The TAS2521 is a low power digital input speaker amp with support for 24-bit digital I2S data mono playback.

In addition to driving a speaker amp up to 4-Ω, the device also features a mono headphone driver and a fully programmable miniDSP for signal processing. The digital audio data format is programmable to work with popular audio standard protocols (I2S, left/right-justified) in master, slave, DSP and TDM modes. The fully programmable miniDSP can support several functions such equalization for audio, multi-band DRC, tone generation and several other user defined functions. An on-chip PLL provides the high-speed clock needed by the digital signal-processing block. The volume level can be controlled by register control. The audio functions are controlled using the I2C™ serial bus or SPI bus. The device includes an on-board LDO that runs off the speaker power supply to handle all internal device analog and digital power needs. The included POR as power-on-reset circuit reliably resets the device into its default state so no external reset is required at normal usage; however, the device does have a reset pin for more complex system initialization needs. The device also includes two analog inputs for mixing and muxing in both speaker and headphone analog paths.

  • Digital input mono speaker amp
  • Instruction-Programmable Embedded miniDSP
  • Supports 8-kHz to 192-kHz Sample Rates
  • Mono Class-D BTL Speaker Driver (2.6 W Into 4 Ω or 1.7 W Into 8 Ω)
  • Mono Headphone/Lineout Driver
  • Two Single-Ended Inputs With Output Mixing and Level Control
  • Embedded Power-on-Reset
  • Integrated LDO
  • Built-in Digital Audio Processing Blocks With User-Programmable Biquad Filters
  • Integrated PLL Used for Programmable Digital Audio Processor
  • I2S, Left-Justified, Right-Justified, DSP, and TDM Audio Interfaces
  • I2C and SPI control with auto-increment
  • Full Power-Down Control
  • Power Supplies:

  • -- Analog: 1.5 V–1.95 V
    -- Digital Core: 1.65 V–1.95 V
    -- Digital I/O: 1.1 V–3.6 V
    -- Class-D: 2.7 V–5.5 V (SPKVDD ≥ AVDD)
  • 4mm × 4mm 24-Pin QFN Package
  • Speaker amps
    TAS2521 2-W, mono, digital & analog input Class-D audio amp with miniDSP & 18-mW, mono headphone driver

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    2. Download - TAS25xx Codec Control EVM GUI from this page

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    Evaluation board

    TAS2521EVM – TAS2521 Evaluation Module

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    GUI for evaluation module (EVM)

    TAS25xx Codec Control EVM GUI – SLAC772.ZIP (3110KB)

    TI's Standard Terms and Conditions for Evaluation Items apply.

    Technical documentation

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    Type Title Date
    Certificate TAS2521EVM EU Declaration of Conformity (DoC) Jan. 02, 2019
    User guide TAS25xx Codec Control EVM (Rev. A) Oct. 31, 2017
    Data sheet Digital Input Class-D Speaker Amplifier with Embedded miniDSP and Mono Headphone datasheet (Rev. A) Feb. 24, 2013
    User guide TAS2521 Application Reference Guide Feb. 14, 2013

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