TAS2505 - Digital Input Class-D Speaker Amplifier with Audio Processing and mono headphone amplifier

The TAS2505 device 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 programmable digital-signal processing block. 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 programmable digital-signal processing block can support Bass boost, treble, or EQ 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
• Supports 8-kHz to 96-kHz Sample Rates
• Mono Class-D BTL Speaker Driver (2 W into 4 Ω or 1.7 W into 8 Ω)
• Mono Headphone Driver
• Two Single-Ended Inputs With Output Mixing and Level Control
• Embedded Power-On-Reset
• Integrated LDO
• Programmable Digital Audio Processing Blocks for Bass Boost, Treble, EQ With up to Six Biquads for Playback
• Integrated PLL Used for Programmable Digital Audio Processing Blocks
• I²S, Left-Justified, Right-Justified, DSP, and TDM Audio Interfaces
• I²C Control and SPI control With Auto-Increment
• Full Power-Down Control
• Power Supplies:
  • Analog: 1.5 V to 1.95 V
  • Digital Core: 1.65 V to 1.95 V
  • Digital I/O: 1.1 V to 3.6 V
  • Class-D: 2.7 V to 5.5 V (SPKVDD ≥ AVDD)
• 24-Pin VQFN Package (4 mm × 4 mm)