JAJSSN9 December   2023 TAD5212

ADVANCE INFORMATION  

  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  Timing Requirements: I2C Interface
    7. 6.7  Switching Characteristics: I2C Interface
    8. 6.8  Timing Requirements: SPI Interface
    9. 6.9  Switching Characteristics: SPI Interface
    10. 6.10 Timing Requirements: TDM, I2S or LJ Interface
    11. 6.11 Switching Characteristics: TDM, I2S or LJ Interface
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Serial Interfaces
        1. 7.3.1.1 Control Serial Interfaces
        2. 7.3.1.2 Audio Serial Interfaces
          1. 7.3.1.2.1 Time Division Multiplexed Audio (TDM) Interface
          2. 7.3.1.2.2 Inter IC Sound (I2S) Interface
          3. 7.3.1.2.3 Left-Justified (LJ) Interface
        3. 7.3.1.3 Using Multiple Devices With Shared Buses
        4. 7.3.1.4 Phase-Locked Loop (PLL) and Clock Generation
        5. 7.3.1.5 Output Channel Configurations
        6. 7.3.1.6 Reference Voltage
        7. 7.3.1.7 Programmable Microphone Bias
        8. 7.3.1.8 Signal-Chain Processing
          1. 7.3.1.8.1 DAC Signal-Chain
            1. 7.3.1.8.1.1 Programmable Channel Gain and Digital Volume Control
            2. 7.3.1.8.1.2 Programmable Channel Gain Calibration
            3. 7.3.1.8.1.3 Programmable Digital High-Pass Filter
            4. 7.3.1.8.1.4 Programmable Digital Biquad Filters
            5. 7.3.1.8.1.5 Programmable Digital Mixer
            6. 7.3.1.8.1.6 Configurable Digital Interpolation Filters
              1. 7.3.1.8.1.6.1 Linear Phase Filters
                1. 7.3.1.8.1.6.1.1 Sampling Rate: 16 kHz or 14.7 kHz
                2. 7.3.1.8.1.6.1.2 Sampling Rate: 24 kHz or 22.05 kHz
                3. 7.3.1.8.1.6.1.3 Sampling Rate: 32 kHz or 29.4 kHz
                4. 7.3.1.8.1.6.1.4 Sampling Rate: 48 kHz or 44.1 kHz
                5. 7.3.1.8.1.6.1.5 Sampling Rate: 96 kHz or 88.2 kHz
                6. 7.3.1.8.1.6.1.6 Sampling Rate: 384 kHz or 352.8 kHz
        9. 7.3.1.9 Interrupts, Status, and Digital I/O Pin Multiplexing
    4. 7.4 Device Functional Modes
    5. 7.5 Register Maps
      1. 7.5.1 TAD5212_P0 Registers
      2. 7.5.2 TAD5212_P1 Registers
      3. 7.5.3 TAD5212_P3 Registers
  9. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Application
      2. 8.2.2 Design Requirements
      3. 8.2.3 Detailed Design Procedure
  10. 9 Power Supply Recommendations
  11. 10Device and Documentation Support
    1. 10.1 Documentation Support
      1. 10.1.1 Related Documentation
    2. 10.2 ドキュメントの更新通知を受け取る方法
    3. 10.3 サポート・リソース
    4. 10.4 Trademarks
    5. 10.5 静電気放電に関する注意事項
    6. 10.6 用語集
  12. 11Mechanical, 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
7.3.1.8.1.3 Programmable 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 programmable high-pass filter (HPF). The HPF is not a channel-independent filter setting but is globally applicable for all DAC 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. Table 7-14 shows the predefined –3-dB cutoff frequencies available that can be set by using the DAC_DSP_HPF_SEL[1:0] register bits of P0_R115. Additionally, to achieve a custom –3-dB cutoff frequency for a specific application, the device also allows the first-order IIR filter coefficients to be programmed when the DAC_DSP_HPF_SEL[1:0] register bits are set to 2'b00. Figure 7-16 illustrates a frequency response plot for the HPF filter.

Table 7-14 HPF Programmable Settings
P0_R115_D[5:4] : DAC_DSP_HPF_SEL[1:0]-3-dB CUTOFF FREQUENCY SETTING-3-dB CUTOFF FREQUENCY AT 16-kHz SAMPLE RATE-3-dB CUTOFF FREQUENCY AT
48-kHz SAMPLE RATE
00Programmable 1st-order IIR filterProgrammable 1st-order IIR filterProgrammable 1st-order IIR filter
01 (default)0.00002 × fS0.25 Hz1 Hz
100.00025 × fS4 Hz12 Hz
110.002 × fS32 Hz96 Hz

 

GUID-3DA4891F-9467-4644-921B-98474D40A913-low.gifFigure 7-16 HPF Filter Frequency Response Plot

Equation 1 gives the transfer function for the first-order programable IIR filter:

Equation 1. GUID-467C00D0-DF25-47F8-AFD0-8FA0B6BCEFC3-low.gif

The frequency response for this first-order programmable IIR filter with default coefficients is flat at a gain of 0 dB (all-pass filter). The host device can override the frequency response by programming the IIR coefficients in Table 7-15 to achieve the desired frequency response for high-pass filtering or any other desired filtering. If DAC_DSP_HPF_SEL[1:0] are set to 2'b00, the host device must write these coefficients values for the desired frequency response before powering-up any DAC channel for playback. Table 7-15 shows the filter coefficients for the first-order IIR filter.

Table 7-15 1st-Order IIR Filter Coefficients
FILTERFILTER COEFFICIENTDEFAULT COEFFICIENT VALUECOEFFICIENT REGISTER MAPPING
Programmable 1st-order IIR filter (can be allocated to HPF or any other desired filter)N00x7FFFFFFFP17_R120-R124
N10x00000000P17_R125-R128
D10x00000000P18_R8-R11