SLASF28 December   2023 TAC5142

ADVANCE INFORMATION  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Device Comparison Table
  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 Timing Requirements: TDM, I2S or LJ Interface
    7. 6.7 Switching Characteristics: TDM, I2S or LJ Interface
  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 Hardware Control
      2. 8.3.2 Audio Serial Interfaces
        1. 8.3.2.1 Time Division Multiplexed Audio (TDM) Interface
        2. 8.3.2.2 Inter IC Sound (I2S) Interface
      3. 8.3.3 Phase-Locked Loop (PLL) and Clock Generation
      4. 8.3.4 Analog Input Output Configurations
      5. 8.3.5 Reference Voltage
      6. 8.3.6 ADC Signal-Chain
        1. 8.3.6.1 Digital High-Pass Filter
        2. 8.3.6.2 Configurable Digital Decimation Filters
          1. 8.3.6.2.1 Linear Phase Filters
            1. 8.3.6.2.1.1 Sampling Rate: 16 kHz or 14.7 kHz
            2. 8.3.6.2.1.2 Sampling Rate: 24 kHz or 22.05 kHz
            3. 8.3.6.2.1.3 Sampling Rate: 32 kHz or 29.4 kHz
            4. 8.3.6.2.1.4 Sampling Rate: 48 kHz or 44.1 kHz
            5. 8.3.6.2.1.5 Sampling Rate: 96 kHz or 88.2 kHz
      7. 8.3.7 DAC Signal-Chain
        1. 8.3.7.1 Configurable Digital Interpolation Filters
          1. 8.3.7.1.1 Linear Phase Filters
            1. 8.3.7.1.1.1 Sampling Rate: 16 kHz or 14.7 kHz
            2. 8.3.7.1.1.2 Sampling Rate: 24 kHz or 22.05 kHz
            3. 8.3.7.1.1.3 Sampling Rate: 32 kHz or 29.4 kHz
            4. 8.3.7.1.1.4 Sampling Rate: 48 kHz or 44.1 kHz
            5. 8.3.7.1.1.5 Sampling Rate: 96 kHz or 88.2 kHz
            6. 8.3.7.1.1.6 Sampling Rate: 384 kHz or 352.8 kHz
    4. 8.4 Device Functional Modes
      1. 8.4.1 Active Mode
  10. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Application
      2. 9.2.2 Design Requirements
      3. 9.2.3 Detailed Design Procedure
  11. 10Power Supply Recommendations
  12. 11Device and Documentation Support
    1. 11.1 Documentation Support
      1. 11.1.1 Related Documentation
    2. 11.2 Receiving Notification of Documentation Updates
    3. 11.3 Support Resources
    4. 11.4 Trademarks
    5. 11.5 Electrostatic Discharge Caution
    6. 11.6 Glossary
  13. 12Revision History
  14. 13Mechanical, Packaging, and Orderable Information
    1. 13.1 Tape and Reel Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

8.3.6.1 Digital High-Pass Filter

To remove the DC offset component and attenuate the undesired low-frequency noise content in the record data, the device supports a configurable high-pass filter (HPF) with –3-dB cut-off frequency of 0.000021 × fS or 0.00025 × fS. The HPF is not a channel-independent filter but is globally applicable for all the ADC channels. This HPF is constructed using the first-order infinite impulse response (IIR) filter, and is efficient enough to filter out possible DC components of the signal. This configuration is only available in I2S or LJF Target mode of operation. In Target TDM Mode of operation, MD3 is used to set slot for input and output data streams. Refer to section for more details on Daisy chain features. In Controller Mode, MD3 is used as CCLK input and HPF is by default set to 0.000021 × fS. Additionally, As lower frequency filter in digital requires higher value capacitor as well for low droop at cutoff frequency, the device also adjusts the quick charge time along with HPF cutoff with this configuration. Table 8-8 shows the MD3 configuration and –3-dB cutoff frequency value and quick charge time.

Table 8-8 HPF Cutoff Frequency Value
MD3 –3-dB CUTOFF FREQUENCY VALUE QUICK CHARGE TIME -3-dB CUTTOFF FREQUENCY AT 48 kHz SAMPLE RATE
Low 0.000021 × fS 50 ms 1 Hz
High 0.00025 × fS 12.5 ms 12 Hz