Description

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.

Features:

 

• 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

Type: Evaluation Modules & Boards

Part number: TAS2521EVM

More details from Texas Instruments