JAJSHP6A July   2019  – October 2019 TLV320ADC6140

PRODUCTION DATA.  

  1. 1 特長
  2. 2 アプリケーション
  3. 3 概要
    1.     ブロック概略図
  4. 4 改訂履歴
  5. 5 概要（続き）
  6. 6 デバイス比較表
  7. 7 Pin Configuration and Functions
    1.     Pin Functions
  8. 8 Specifications
    1. 8.1  Absolute Maximum Ratings
    2. 8.2  ESD Ratings
    3. 8.3  Recommended Operating Conditions
    4. 8.4  Thermal Information
    5. 8.5  Electrical Characteristics
    6. 8.6  Timing Requirements: I2C Interface
    7. 8.7  Switching Characteristics: I2C Interface
    8. 8.8  Timing Requirements: SPI Interface
    9. 8.9  Switching Characteristics: SPI Interface
    10. 8.10 Timing Requirements: TDM, I2S or LJ Interface
    11. 8.11 Switching Characteristics: TDM, I2S or LJ Interface
    12. 8.12 Timing Requirements: PDM Digital Microphone Interface
    13. 8.13 Switching Characteristics: PDM Digial Microphone Interface
    14. 8.14 Typical Characteristics
  9. 9 Detailed Description
    1. 9.1 Overview
    2. 9.2 Functional Block Diagram
    3. 9.3 Feature Description
      1. 9.3.1  Serial Interfaces
        1. 9.3.1.1 Control Serial Interfaces
        2. 9.3.1.2 Audio Serial Interfaces
          1. 9.3.1.2.1 Time Division Multiplexed Audio (TDM) Interface
          2. 9.3.1.2.2 Inter IC Sound (I2S) Interface
          3. 9.3.1.2.3 Left-Justified (LJ) Interface
        3. 9.3.1.3 Using Multiple Devices With Shared Buses
      2. 9.3.2  Phase-Locked Loop (PLL) and Clock Generation
      3. 9.3.3  Input Channel Configurations
      4. 9.3.4  Reference Voltage
      5. 9.3.5  Programmable Microphone Bias
      6. 9.3.6  Signal-Chain Processing
        1. 9.3.6.1 Programmable Channel Gain and Digital Volume Control
        2. 9.3.6.2 Programmable Channel Gain Calibration
        3. 9.3.6.3 Programmable Channel Phase Calibration
        4. 9.3.6.4 Programmable Digital High-Pass Filter
        5. 9.3.6.5 Programmable Digital Biquad Filters
        6. 9.3.6.6 Programmable Channel Summer and Digital Mixer
        7. 9.3.6.7 Configurable Digital Decimation Filters
          1. 9.3.6.7.1 Linear Phase Filters
            1. 9.3.6.7.1.1 Sampling Rate: 8 kHz or 7.35 kHz
            2. 9.3.6.7.1.2 Sampling Rate: 16 kHz or 14.7 kHz
            3. 9.3.6.7.1.3 Sampling Rate: 24 kHz or 22.05 kHz
            4. 9.3.6.7.1.4 Sampling Rate: 32 kHz or 29.4 kHz
            5. 9.3.6.7.1.5 Sampling Rate: 48 kHz or 44.1 kHz
            6. 9.3.6.7.1.6 Sampling Rate: 96 kHz or 88.2 kHz
            7. 9.3.6.7.1.7 Sampling Rate: 192 kHz or 176.4 kHz
            8. 9.3.6.7.1.8 Sampling Rate: 384 kHz or 352.8 kHz
            9. 9.3.6.7.1.9 Sampling Rate 768 kHz or 705.6 kHz
          2. 9.3.6.7.2 Low-Latency Filters
            1. 9.3.6.7.2.1 Sampling Rate: 16 kHz or 14.7 kHz
            2. 9.3.6.7.2.2 Sampling Rate: 24 kHz or 22.05 kHz
            3. 9.3.6.7.2.3 Sampling Rate: 32 kHz or 29.4 kHz
            4. 9.3.6.7.2.4 Sampling Rate: 48 kHz or 44.1 kHz
            5. 9.3.6.7.2.5 Sampling Rate: 96 kHz or 88.2 kHz
            6. 9.3.6.7.2.6 Sampling Rate 192 kHz or 176.4 kHz
          3. 9.3.6.7.3 Ultra-Low-Latency Filters
            1. 9.3.6.7.3.1 Sampling Rate: 16 kHz or 14.7 kHz
            2. 9.3.6.7.3.2 Sampling Rate: 24 kHz or 22.05 kHz
            3. 9.3.6.7.3.3 Sampling Rate: 32 kHz or 29.4 kHz
            4. 9.3.6.7.3.4 Sampling Rate: 48 kHz or 44.1 kHz
            5. 9.3.6.7.3.5 Sampling Rate: 96 kHz or 88.2 kHz
            6. 9.3.6.7.3.6 Sampling Rate 192 kHz or 176.4 kHz
            7. 9.3.6.7.3.7 Sampling Rate 384 kHz or 352.8 kHz
      7. 9.3.7  Dynamic Range Enhancer (DRE)
      8. 9.3.8  Automatic Gain Controller (AGC)
      9. 9.3.9  Digital PDM Microphone Record Channel
      10. 9.3.10 Interrupts, Status, and Digital I/O Pin Multiplexing
    4. 9.4 Device Functional Modes
      1. 9.4.1 Hardware Shutdown
      2. 9.4.2 Sleep Mode or Software Shutdown
      3. 9.4.3 Active Mode
      4. 9.4.4 Software Reset
    5. 9.5 Programming
      1. 9.5.1 Control Serial Interfaces
        1. 9.5.1.1 I2C Control Interface
          1. 9.5.1.1.1 General I2C Operation
          2. 9.5.1.1.2 I2C Single-Byte and Multiple-Byte Transfers
            1. 9.5.1.1.2.1 I2C Single-Byte Write
            2. 9.5.1.1.2.2 I2C Multiple-Byte Write
            3. 9.5.1.1.2.3 I2C Single-Byte Read
            4. 9.5.1.1.2.4 I2C Multiple-Byte Read
        2. 9.5.1.2 SPI Control Interface
          1. Table 1. SPI Command Word
    6. 9.6 Register Maps
      1. 9.6.1 Device Configuration Registers
        1. 9.6.1.1 Register Descriptions
          1. 9.6.1.1.1  PAGE_CFG Register (page = 0x00, address = 0x00) [reset = 0h]
            1. Table 53. PAGE_CFG Register Field Descriptions
          2. 9.6.1.1.2  SW_RESET Register (page = 0x00, address = 0x01) [reset = 0h]
            1. Table 54. SW_RESET Register Field Descriptions
          3. 9.6.1.1.3  SLEEP_CFG Register (page = 0x00, address = 0x02) [reset = 0h]
            1. Table 55. SLEEP_CFG Register Field Descriptions
          4. 9.6.1.1.4  SHDN_CFG Register (page = 0x00, address = 0x05) [reset = 5h]
            1. Table 56. SHDN_CFG Register Field Descriptions
          5. 9.6.1.1.5  ASI_CFG0 Register (page = 0x00, address = 0x07) [reset = 30h]
            1. Table 57. ASI_CFG0 Register Field Descriptions
          6. 9.6.1.1.6  ASI_CFG1 Register (page = 0x00, address = 0x08) [reset = 0h]
            1. Table 58. ASI_CFG1 Register Field Descriptions
          7. 9.6.1.1.7  ASI_CFG2 Register (page = 0x00, address = 0x09) [reset = 0h]
            1. Table 59. ASI_CFG2 Register Field Descriptions
          8. 9.6.1.1.8  ASI_CH1 Register (page = 0x00, address = 0x0B) [reset = 0h]
            1. Table 60. ASI_CH1 Register Field Descriptions
          9. 9.6.1.1.9  ASI_CH2 Register (page = 0x00, address = 0x0C) [reset = 1h]
            1. Table 61. ASI_CH2 Register Field Descriptions
          10. 9.6.1.1.10 ASI_CH3 Register (page = 0x00, address = 0x0D) [reset = 2h]
            1. Table 62. ASI_CH3 Register Field Descriptions
          11. 9.6.1.1.11 ASI_CH4 Register (page = 0x00, address = 0x0E) [reset = 3h]
            1. Table 63. ASI_CH4 Register Field Descriptions
          12. 9.6.1.1.12 ASI_CH5 Register (page = 0x00, address = 0x0F) [reset = 4h]
            1. Table 64. ASI_CH5 Register Field Descriptions
          13. 9.6.1.1.13 ASI_CH6 Register (page = 0x00, address = 0x10) [reset = 5h]
            1. Table 65. ASI_CH6 Register Field Descriptions
          14. 9.6.1.1.14 ASI_CH7 Register (page = 0x00, address = 0x11) [reset = 6h]
            1. Table 66. ASI_CH7 Register Field Descriptions
          15. 9.6.1.1.15 ASI_CH8 Register (page = 0x00, address = 0x12) [reset = 7h]
            1. Table 67. ASI_CH8 Register Field Descriptions
          16. 9.6.1.1.16 MST_CFG0 Register (page = 0x00, address = 0x13) [reset = 2h]
            1. Table 68. MST_CFG0 Register Field Descriptions
          17. 9.6.1.1.17 MST_CFG1 Register (page = 0x00, address = 0x14) [reset = 48h]
            1. Table 69. MST_CFG1 Register Field Descriptions
          18. 9.6.1.1.18 ASI_STS Register (page = 0x00, address = 0x15) [reset = FFh]
            1. Table 70. ASI_STS Register Field Descriptions
          19. 9.6.1.1.19 CLK_SRC Register (page = 0x00, address = 0x16) [reset = 10h]
            1. Table 71. CLK_SRC Register Field Descriptions
          20. 9.6.1.1.20 PDMCLK_CFG Register (page = 0x00, address = 0x1F) [reset = 40h]
            1. Table 72. PDMCLK_CFG Register Field Descriptions
          21. 9.6.1.1.21 PDMIN_CFG Register (page = 0x00, address = 0x20) [reset = 0h]
            1. Table 73. PDMIN_CFG Register Field Descriptions
          22. 9.6.1.1.22 GPIO_CFG0 Register (page = 0x00, address = 0x21) [reset = 22h]
            1. Table 74. GPIO_CFG0 Register Field Descriptions
          23. 9.6.1.1.23 GPO_CFG0 Register (page = 0x00, address = 0x22) [reset = 0h]
            1. Table 75. GPO_CFG0 Register Field Descriptions
          24. 9.6.1.1.24 GPO_CFG1 Register (page = 0x00, address = 0x23) [reset = 0h]
            1. Table 76. GPO_CFG1 Register Field Descriptions
          25. 9.6.1.1.25 GPO_CFG2 Register (page = 0x00, address = 0x24) [reset = 0h]
            1. Table 77. GPO_CFG2 Register Field Descriptions
          26. 9.6.1.1.26 GPO_CFG3 Register (page = 0x00, address = 0x25) [reset = 0h]
            1. Table 78. GPO_CFG3 Register Field Descriptions
          27. 9.6.1.1.27 GPO_VAL Register (page = 0x00, address = 0x29) [reset = 0h]
            1. Table 79. GPO_VAL Register Field Descriptions
          28. 9.6.1.1.28 GPIO_MON Register (page = 0x00, address = 0x2A) [reset = 0h]
            1. Table 80. GPIO_MON Register Field Descriptions
          29. 9.6.1.1.29 GPI_CFG0 Register (page = 0x00, address = 0x2B) [reset = 0h]
            1. Table 81. GPI_CFG0 Register Field Descriptions
          30. 9.6.1.1.30 GPI_CFG1 Register (page = 0x00, address = 0x2C) [reset = 0h]
            1. Table 82. GPI_CFG1 Register Field Descriptions
          31. 9.6.1.1.31 GPI_MON Register (page = 0x00, address = 0x2F) [reset = 0h]
            1. Table 83. GPI_MON Register Field Descriptions
          32. 9.6.1.1.32 INT_CFG Register (page = 0x00, address = 0x32) [reset = 0h]
            1. Table 84. INT_CFG Register Field Descriptions
          33. 9.6.1.1.33 INT_MASK0 Register (page = 0x00, address = 0x33) [reset = FFh]
            1. Table 85. INT_MASK0 Register Field Descriptions
          34. 9.6.1.1.34 INT_LTCH0 Register (page = 0x00, address = 0x36) [reset = 0h]
            1. Table 86. INT_LTCH0 Register Field Descriptions
          35. 9.6.1.1.35 BIAS_CFG Register (page = 0x00, address = 0x3B) [reset = 0h]
            1. Table 87. BIAS_CFG Register Field Descriptions
          36. 9.6.1.1.36 CH1_CFG0 Register (page = 0x00, address = 0x3C) [reset = 0h]
            1. Table 88. CH1_CFG0 Register Field Descriptions
          37. 9.6.1.1.37 CH1_CFG1 Register (page = 0x00, address = 0x3D) [reset = 0h]
            1. Table 89. CH1_CFG1 Register Field Descriptions
          38. 9.6.1.1.38 CH1_CFG2 Register (page = 0x00, address = 0x3E) [reset = C9h]
            1. Table 90. CH1_CFG2 Register Field Descriptions
          39. 9.6.1.1.39 CH1_CFG3 Register (page = 0x00, address = 0x3F) [reset = 80h]
            1. Table 91. CH1_CFG3 Register Field Descriptions
          40. 9.6.1.1.40 CH1_CFG4 Register (page = 0x00, address = 0x40) [reset = 0h]
            1. Table 92. CH1_CFG4 Register Field Descriptions
          41. 9.6.1.1.41 CH2_CFG0 Register (page = 0x00, address = 0x41) [reset = 0h]
            1. Table 93. CH2_CFG0 Register Field Descriptions
          42. 9.6.1.1.42 CH2_CFG1 Register (page = 0x00, address = 0x42) [reset = 0h]
            1. Table 94. CH2_CFG1 Register Field Descriptions
          43. 9.6.1.1.43 CH2_CFG2 Register (page = 0x00, address = 0x43) [reset = C9h]
            1. Table 95. CH2_CFG2 Register Field Descriptions
          44. 9.6.1.1.44 CH2_CFG3 Register (page = 0x00, address = 0x44) [reset = 80h]
            1. Table 96. CH2_CFG3 Register Field Descriptions
          45. 9.6.1.1.45 CH2_CFG4 Register (page = 0x00, address = 0x45) [reset = 0h]
            1. Table 97. CH2_CFG4 Register Field Descriptions
          46. 9.6.1.1.46 CH3_CFG0 Register (page = 0x00, address = 0x46) [reset = 0h]
            1. Table 98. CH3_CFG0 Register Field Descriptions
          47. 9.6.1.1.47 CH3_CFG1 Register (page = 0x00, address = 0x47) [reset = 0h]
            1. Table 99. CH3_CFG1 Register Field Descriptions
          48. 9.6.1.1.48 CH3_CFG2 Register (page = 0x00, address = 0x48) [reset = C9h]
            1. Table 100. CH3_CFG2 Register Field Descriptions
          49. 9.6.1.1.49 CH3_CFG3 Register (page = 0x00, address = 0x49) [reset = 80h]
            1. Table 101. CH3_CFG3 Register Field Descriptions
          50. 9.6.1.1.50 CH3_CFG4 Register (page = 0x00, address = 0x4A) [reset = 0h]
            1. Table 102. CH3_CFG4 Register Field Descriptions
          51. 9.6.1.1.51 CH4_CFG0 Register (page = 0x00, address = 0x4B) [reset = 0h]
            1. Table 103. CH4_CFG0 Register Field Descriptions
          52. 9.6.1.1.52 CH4_CFG1 Register (page = 0x00, address = 0x4C) [reset = 0h]
            1. Table 104. CH4_CFG1 Register Field Descriptions
          53. 9.6.1.1.53 CH4_CFG2 Register (page = 0x00, address = 0x4D) [reset = C9h]
            1. Table 105. CH4_CFG2 Register Field Descriptions
          54. 9.6.1.1.54 CH4_CFG3 Register (page = 0x00, address = 0x4E) [reset = 80h]
            1. Table 106. CH4_CFG3 Register Field Descriptions
          55. 9.6.1.1.55 CH4_CFG4 Register (page = 0x00, address = 0x4F) [reset = 0h]
            1. Table 107. CH4_CFG4 Register Field Descriptions
          56. 9.6.1.1.56 CH5_CFG2 Register (page = 0x00, address = 0x52) [reset = C9h]
            1. Table 108. CH5_CFG2 Register Field Descriptions
          57. 9.6.1.1.57 CH5_CFG3 Register (page = 0x00, address = 0x53) [reset = 80h]
            1. Table 109. CH5_CFG3 Register Field Descriptions
          58. 9.6.1.1.58 CH5_CFG4 Register (page = 0x00, address = 0x54) [reset = 0h]
            1. Table 110. CH5_CFG4 Register Field Descriptions
          59. 9.6.1.1.59 CH6_CFG2 Register (page = 0x00, address = 0x57) [reset = C9h]
            1. Table 111. CH6_CFG2 Register Field Descriptions
          60. 9.6.1.1.60 CH6_CFG3 Register (page = 0x00, address = 0x58) [reset = 80h]
            1. Table 112. CH6_CFG3 Register Field Descriptions
          61. 9.6.1.1.61 CH6_CFG4 Register (page = 0x00, address = 0x59) [reset = 0h]
            1. Table 113. CH6_CFG4 Register Field Descriptions
          62. 9.6.1.1.62 CH7_CFG2 Register (page = 0x00, address = 0x5C) [reset = C9h]
            1. Table 114. CH7_CFG2 Register Field Descriptions
          63. 9.6.1.1.63 CH7_CFG3 Register (page = 0x00, address = 0x5D) [reset = 80h]
            1. Table 115. CH7_CFG3 Register Field Descriptions
          64. 9.6.1.1.64 CH7_CFG4 Register (page = 0x00, address = 0x5E) [reset = 0h]
            1. Table 116. CH7_CFG4 Register Field Descriptions
          65. 9.6.1.1.65 CH8_CFG2 Register (page = 0x00, address = 0x61) [reset = C9h]
            1. Table 117. CH8_CFG2 Register Field Descriptions
          66. 9.6.1.1.66 CH8_CFG3 Register (page = 0x00, address = 0x62) [reset = 80h]
            1. Table 118. CH8_CFG3 Register Field Descriptions
          67. 9.6.1.1.67 CH8_CFG4 Register (page = 0x00, address = 0x63) [reset = 0h]
            1. Table 119. CH8_CFG4 Register Field Descriptions
          68. 9.6.1.1.68 DSP_CFG0 Register (page = 0x00, address = 0x6B) [reset = 1h]
            1. Table 120. DSP_CFG0 Register Field Descriptions
          69. 9.6.1.1.69 DSP_CFG1 Register (page = 0x00, address = 0x6C) [reset = 40h]
            1. Table 121. DSP_CFG1 Register Field Descriptions
          70. 9.6.1.1.70 DRE_CFG0 Register (page = 0x00, address = 0x6D) [reset = 7Bh]
            1. Table 122. DRE_CFG0 Register Field Descriptions
          71. 9.6.1.1.71 AGC_CFG0 Register (page = 0x00, address = 0x70) [reset = E7h]
            1. Table 123. AGC_CFG0 Register Field Descriptions
          72. 9.6.1.1.72 IN_CH_EN Register (page = 0x00, address = 0x73) [reset = F0h]
            1. Table 124. IN_CH_EN Register Field Descriptions
          73. 9.6.1.1.73 ASI_OUT_CH_EN Register (page = 0x00, address = 0x74) [reset = 0h]
            1. Table 125. ASI_OUT_CH_EN Register Field Descriptions
          74. 9.6.1.1.74 PWR_CFG Register (page = 0x00, address = 0x75) [reset = 0h]
            1. Table 126. PWR_CFG Register Field Descriptions
          75. 9.6.1.1.75 DEV_STS0 Register (page = 0x00, address = 0x76) [reset = 0h]
            1. Table 127. DEV_STS0 Register Field Descriptions
          76. 9.6.1.1.76 DEV_STS1 Register (page = 0x00, address = 0x77) [reset = 80h]
            1. Table 128. DEV_STS1 Register Field Descriptions
          77. 9.6.1.1.77 I2C_CKSUM Register (page = 0x00, address = 0x7E) [reset = 0h]
            1. Table 129. I2C_CKSUM Register Field Descriptions
      2. 9.6.2 Programmable Coefficient Registers
        1. 9.6.2.1 Programmable Coefficient Registers: Page = 0x02
        2. 9.6.2.2 Programmable Coefficient Registers: Page = 0x03
        3. 9.6.2.3 Programmable Coefficient Registers: Page = 0x04
  10. 10Application and Implementation
    1. 10.1 Application Information
    2. 10.2 Typical Applications
      1. 10.2.1 Four-Channel Analog Microphone Recording
        1. 10.2.1.1 Design Requirements
        2. 10.2.1.2 Detailed Design Procedure
          1. 10.2.1.2.1 Example Device Register Configuration Script for EVM Setup
        3. 10.2.1.3 Application Curves
      2. 10.2.2 Eight-Channel Digital PDM Microphone Recording
        1. 10.2.2.1 Design Requirements
        2. 10.2.2.2 Detailed Design Procedure
          1. 10.2.2.2.1 Example Device Register Configuration Script for EVM Setup
    3. 10.3 What to Do and What Not to Do
  11. 11Power Supply Recommendations
  12. 12Layout
    1. 12.1 Layout Guidelines
    2. 12.2 Layout Example
  13. 13デバイスおよびドキュメントのサポート
    1. 13.1 ドキュメントのサポート
      1. 13.1.1 関連資料
    2. 13.2 ドキュメントの更新通知を受け取る方法
    3. 13.3 コミュニティ・リソース
    4. 13.4 商標
    5. 13.5 静電気放電に関する注意事項
    6. 13.6 Glossary
  14. 14メカニカル、パッケージ、および注文情報

9.3.7 Dynamic Range Enhancer (DRE)

The device integrates an ultra-low noise front-end PGA with 120-dB dynamic range performance with a low-noise, low-distortion, multibit delta-sigma (ΔΣ) ADC with a 108-dB dynamic range. The dynamic range enhancer (DRE) is a digitally assisted algorithm to boost the overall channel performance. The DRE monitors the incoming signal amplitude and accordingly adjusts the internal PGA gain automatically. The DRE achieves a complete-channel dynamic range as high as 120 dB. At a system level, the DRE scheme enables far-field, high-fidelity recording of audio signals in very quiet environments and low-distortion recording in loud environments.

This algorithm is implemented with very low latency and all signal chain blocks are designed to minimize any audible artifacts that may occur resulting from dynamic gain modulation. Additionally, the host can configure the target signal threshold level at which DRE is triggered by setting the appropriate value for the DRE_LVL[3:0], P0_R109[7:4] register bits. The DRE_LVL default level is set to –54 dB and TI recommends setting the DRE_LVL value lower than –30 dB to maximize the benefit of the DRE in real-world applications and to minimize any audible artifacts. Table 44 lists the DRE_LVL configuration settings.

Table 44. DRE Trigger Threshold Level Programmable Settings

P0_R109_D[7:4] : DRE_LVL[3:0] DRE TRIGGER THRESHOLD LEVEL
0000 The DRE trigger threshold is the –12-dB input signal level
0001 The DRE trigger threshold is the –18-dB input signal level
0010 The DRE trigger threshold is the –24-dB input signal level
… …
0111 (default) The DRE trigger threshold is the –54-dB input signal level
… …
1001 The DRE trigger threshold is the –66-dB input signal level
1010 to 1111 Reserved (do not use these settings)

The DRE gain range can be dynamically modulated by using the DRE_MAXGAIN[3:0, P0_R109[3:0] register bits. The DRE_MAXGAIN default value is set to 24 dB, and the DRE_MAXGAIN value is recommended to be set lower than 24 dB to maximize the benefit of the DRE in real-world applications and to minimize any audible artifacts. Table 45 lists the DRE_MAXGAIN configuration settings.

Table 45. DRE Maximum Gain Programmable Settings

P0_R109_D[3:0] : DRE_MAXGAIN[3:0] DRE MAXIMUM GAIN ALLOWED
0000 The DRE maximum gain allowed is 2 dB
0001 The DRE maximum gain allowed is 4 dB
0010 The DRE maximum gain allowed is 6 dB
… …
1011 (default) The DRE maximum gain allowed is 24 dB
… …
1110 The DRE maximum gain allowed is 30 dB
1111 Reserved (do not use this setting)

The DRE scheme is only supported for analog microphone recording channels with an AC-coupled input for best dynamic range performance. The DRE scheme can be independently enabled or disabled for each channel using the CH1_DREEN (P0_R60_D0), CH2_DREEN (P0_R65_D0), CH3_DREEN (P0_R70_D0), and CH4_DREEN (P0_R75_D0) register bits. For a DC-coupled input, the DRE scheme can be used with limited DRE_MAXGAIN depending on the DC differential input common-mode offset.

Enabling the DRE for processing increases the power consumption of the device because of increased signal processing. Therefore, disable the DRE for low-power critical applications. Furthermore, the DRE is not supported for output sample rates greater than 192 kHz.