TAS2521

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SLAS687A – FEBRUARY 2013 – REVISED FEBRUARY 2013

Digital Input Class-D Speaker Amplifier with Embedded miniDSP and mono headphone

amplifier

Check for Samples: TAS2521

1

INTRODUCTION

1.1

Features

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• Digital Input Mono Speaker Amp

1.2

Applications

• Instruction-Programmable Embedded miniDSP

•

Portable Audio Devices

• Supports 8-kHz to 192-kHz Sample Rates

•

White goods

• Mono Class-D BTL Speaker Driver (2 W Into

•

Portable Navigation Devices

4

Ω or 1.7 W Into 8 Ω)

• Mono Headphone Driver

1.3

Description

• Two Single-Ended Inputs With Output Mixing

and Level Control

The TAS2521 is a low power digital input speaker

• Embedded Power-on-Reset

amp with support for 24-bit digital I2S data mono

• Integrated LDO

playback.

• Built-in Digital Audio Processing Blocks With

In addition to driving a speaker amp upto 4-

Ω, the

User-Programmable Biquad Filters

device also features a mono headphone driver and a

• Integrated PLL Used for Programmable Digital

fully programmable miniDSP for signal processing.

Audio Processor

The digital audio data format is programmable to

• I2S, Left-Justified, Right-Justified, DSP, and

work with popular audio standard protocols (I2S,

TDM Audio Interfaces

left/right-justified) in master, slave, DSP and TDM

• I2C and SPI control with auto-increment

modes. The fully programmable miniDSP can support

• Full Power-Down Control

several functions such equalization for audio, multi-

• Power Supplies:

band DRC, tone generation and several other user

– Analog: 1.5 V–1.95 V

defined functions. An on-chip PLL provides the high-

– Digital Core: 1.65 V–1.95 V

speed clock needed by the digital signal-processing

– Digital I/O: 1.1 V–3.6 V

block. The volume level can be controlled by register

– Class-D: 2.7 V–5.5 V (SPKVDD

≥ AVDD)

control. The audio functions are controlled using the

• 24-Pin QFN Package (4mm × 4mm)

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-resetcircuit

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.

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Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PRODUCTION DATA information is current as of publication date. Products conform to

Copyright © 2013, Texas Instruments Incorporated

specifications per the terms of the Texas Instruments standard warranty. Production

processing does not necessarily include testing of all parameters.