JAJSDI7E july   2017  – july 2023 TAS2505-Q1

PRODUCTION DATA  

  1.   1
  2. 1 特長
  3. 2 アプリケーション
  4. 3 概要
  5. 4 Revision History
  6. 5 Pin Configuration and Functions
  7. 6 Specifications
    1. 6.1  Absolute Maximum Ratings
    2. 6.2  ESD Ratings
    3. 6.3  Recommended Operating Conditions
    4. 6.4  Thermal Information
    5. 6.5  Electrical Characteristics
    6. 6.6  I2S/LJF/RJF Timing in Master Mode
    7. 6.7  I2S/LJF/RJF Timing in Slave Mode
    8. 6.8  DSP Timing in Master Mode
    9. 6.9  DSP Timing in Slave Mode
    10. 6.10 I2C Interface Timing
    11. 6.11 SPI Interface Timing
    12. 6.12 Typical Characteristics
      1. 6.12.1 Class D Speaker Driver Performance
      2. 6.12.2 HP Driver Performance
  8. 7 Parameter Measurement Information
  9. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Audio Analog I/O
      2. 8.3.2 Audio DAC and Audio Analog Outputs
      3. 8.3.3 DAC
      4. 8.3.4 POR
      5. 8.3.5 CLOCK Generation and PLL
      6. 8.3.6 Speaker Driver
      7. 8.3.7 Automotive Diagnostics
    4. 8.4 Device Functional Modes
      1. 8.4.1 Digital Pins
      2. 8.4.2 Analog Pins
      3. 8.4.3 Multifunction Pins
      4. 8.4.4 Analog Signals
        1. 8.4.4.1 Analog Inputs AINL and AINR
      5. 8.4.5 DAC Processing Blocks — Overview
      6. 8.4.6 Digital Mixing and Routing
      7. 8.4.7 Analog Audio Routing
      8. 8.4.8 5V LDO
      9. 8.4.9 Digital Audio and Control Interface
        1. 8.4.9.1 Digital Audio Interface
        2. 8.4.9.2 Control Interface
          1. 8.4.9.2.1 I2C Control Mode
          2. 8.4.9.2.2 SPI Digital Interface
        3. 8.4.9.3 Device Special Functions
    5. 8.5 Register Map
  10. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Applications
      1. 9.2.1 Typical Configuration
        1. 9.2.1.1 Design Requirements
        2. 9.2.1.2 Detailed Design Procedure
        3. 9.2.1.3 Application Curves
      2. 9.2.2 Circuit Configuration With Internal LDO
        1. 9.2.2.1 Design Requirements
  11. 10Power Supply Recommendations
  12. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
    3. 11.3 Thermal Pad
  13. 12Device and Documentation Support
    1. 12.1 Documentation Support
      1. 12.1.1 Related Documentation
    2. 12.2 Receiving Notification of Documentation Updates
    3. 12.3 Community Resources
    4. 12.4 Trademarks
  14. 13Mechanical, Packaging, and Orderable Information

パッケージ・オプション

メカニカル・データ（パッケージ｜ピン）
サーマルパッド・メカニカル・データ
発注情報

8.3.3 DAC

The TAS2505-Q1 mono audio DAC supports data rates from 8 kHz to 192 kHz. The audio channel of the mono DAC consists of a signal-processing engine with fixed processing blocks, a digital interpolation filter, multibit digital delta-sigma modulator, and an analog reconstruction filter. The DAC is designed to provide enhanced performance at low sampling rates through increased oversampling and image filtering, thereby keeping quantization noise generated within the delta-sigma modulator and observed in the signal images strongly suppressed within the audio band to beyond 20 kHz. To handle multiple input rates and optimize power dissipation and performance, the TAS2505-Q1 allows the system designer to program the oversampling rates over a wide range from 1 to 1024 by configuring page 0, register 13 and page 0 / register 14. The system designer can choose higher oversampling ratios for lower input data rates and lower oversampling ratios for higher input data rates.

The TAS2505-Q1 DAC channel includes a built-in digital interpolation filter to generate oversampled data for the delta-sigma modulator. The interpolation filter can be chosen from three different types, depending on required frequency response, group delay, and sampling rate.

The DAC path of the TAS2505-Q1 features many options for signal conditioning and signal routing:

  • Digital volume control with a range of –63.5 to +24 dB
  • Mute function

In addition to the standard set of DAC features the TAS2505-Q1 also offers the following special features:

  • Digital auto mute
  • Adaptive filter mode