SLOSE86B july   2022  – july 2023 TAS2781

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  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 I2C Timing Requirements
    7. 6.7 TDM Port Timing Requirements
    8. 6.8 SPI Timing Requirements
    9. 6.9 Typical Characteristics
  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 MODE Selection
      2. 8.3.2 Device Address Selection
      3. 8.3.3 SPI Interface
      4. 8.3.4 Register Organization
    4. 8.4  Device Functional Modes
      1. 8.4.1  TDM Serial Audio Port
      2. 8.4.2  Playback Signal Path
        1. 8.4.2.1  Digital Signal Processor
        2. 8.4.2.2  High Pass Filter
        3. 8.4.2.3  Amplifier Inversion
        4. 8.4.2.4  Digital Volume Control and Amplifier Output Level
        5. 8.4.2.5  PVDDL Supply
        6. 8.4.2.6  Y - Bridge
        7. 8.4.2.7  Low Voltage Signaling (LVS)
        8. 8.4.2.8  Noise Gate Mode
        9. 8.4.2.9  Supply Tracking Limiter
        10. 8.4.2.10 Brownout Prevention
        11. 8.4.2.11 ICC Pin and Inter-Chip Communication
        12. 8.4.2.12 Class-D Settings
          1. 8.4.2.12.1 Output Slew Rate Control
          2. 8.4.2.12.2 Synchronization
      3. 8.4.3  SAR ADC
      4. 8.4.4  Current and Voltage (IV) Sense
      5. 8.4.5  Post Filter Feed-Back (PFFB)
      6. 8.4.6  Thermal Foldback
      7. 8.4.7  Over Power Protection
      8. 8.4.8  Low Battery Protection
      9. 8.4.9  Battery Power Limiter
      10. 8.4.10 Clocks
      11. 8.4.11 Ultrasonic
      12. 8.4.12 Echo Reference
      13. 8.4.13 Hybrid-Pro External Boost Controller
    5. 8.5  Operational Modes
      1. 8.5.1 Beep Generator
      2. 8.5.2 Hardware Shutdown
      3. 8.5.3 Mode Control and Software Reset
      4. 8.5.4 Software Shutdown
      5. 8.5.5 Mute Mode
      6. 8.5.6 Active Mode
      7. 8.5.7 Noise Gate Mode
    6. 8.6  Faults and Status in TAS2781
    7. 8.7  Power Sequencing Requirements
    8. 8.8  Digital Input Pull Downs
    9. 8.9  Register Map
      1. 8.9.1   Page = 0x00 Address = 0x00 [Reset = 00h]
      2. 8.9.2   Page = 0x00 Address = 0x01 [Reset = 00h]
      3. 8.9.3   Page = 0x00 Address = 0x02 [Reset = 1Ah]
      4. 8.9.4   Page = 0x00 Address = 0x03 [Reset = 28h]
      5. 8.9.5   Page = 0x00 Address = 0x04 [Reset = 21h]
      6. 8.9.6   Page = 0x00 Address = 0x05 [Reset = 41h]
      7. 8.9.7   Page = 0x00 Address = 0x06 [Reset = 00h]
      8. 8.9.8   Page = 0x00 Address = 0x07 [Reset = 20h]
      9. 8.9.9   Page = 0x00 Address = 0x08 [Reset = 09h]
      10. 8.9.10  Page = 0x00 Address = 0x09 [Reset = 02h]
      11. 8.9.11  Page = 0x00 Address = 0x0A [Reset = 0Ah]
      12. 8.9.12  Page = 0x00 Address = 0x0C [Reset = 10h]
      13. 8.9.13  Page = 0x00 Address = 0x0D [Reset = 13h]
      14. 8.9.14  Page = 0x00 Address = 0x0E [Reset = C2h]
      15. 8.9.15  Page = 0x00 Address = 0x0F [Reset = 40h]
      16. 8.9.16  Page = 0x00 Address = 0x10 [Reset = 04h]
      17. 8.9.17  Page = 0x00 Address = 0x13 [Reset = 08h]
      18. 8.9.18  Page = 0x00 Address = 0x15 [Reset = 00h]
      19. 8.9.19  Page = 0x00 Address = 0x16 [Reset = 12h]
      20. 8.9.20  Page = 0x00 Address = 0x17 [Reset = 80h]
      21. 8.9.21  Page = 0x00 Address = 0x1A [Reset = 00h]
      22. 8.9.22  Page = 0x00 Address = 0x1B [Reset = 62h]
      23. 8.9.23  Page = 0x00 Address = 0x1C [Reset = 36h]
      24. 8.9.24  Page = 0x00 Address = 0x1D [Reset = 00h]
      25. 8.9.25  Page = 0x00 Address = 0x1F [Reset = 01h]
      26. 8.9.26  Page = 0x00 Address = 0x20 [Reset = 2Eh]
      27. 8.9.27  Page = 0x00 Address = 0x34 [Reset = 06h]
      28. 8.9.28  Page = 0x00 Address = 0x35 [Reset = BDh]
      29. 8.9.29  Page = 0x00 Address = 0x36 [Reset = ADh]
      30. 8.9.30  Page = 0x00 Address = 0x37 [Reset = A8h]
      31. 8.9.31  Page = 0x00 Address = 0x38 [Reset = 00h]
      32. 8.9.32  Page = 0x00 Address = 0x3B [Reset = FCh]
      33. 8.9.33  Page = 0x00 Address = 0x3C [Reset = BBh]
      34. 8.9.34  Page = 0x00 Address = 0x3D [Reset = DDh]
      35. 8.9.35  Page = 0x00 Address = 0x40 [Reset = F6h]
      36. 8.9.36  Page = 0x00 Address = 0x41 [Reset = 14h]
      37. 8.9.37  Page = 0x00 Address = 0x42 [Reset = 00h]
      38. 8.9.38  Page = 0x00 Address = 0x43 [Reset = 00h]
      39. 8.9.39  Page = 0x00 Address = 0x44 [Reset = 00h]
      40. 8.9.40  Page = 0x00 Address = 0x47 [Reset = 00h]
      41. 8.9.41  Page = 0x00 Address = 0x48 [Reset = 00h]
      42. 8.9.42  Page = 0x00 Address = 0x49 [Reset = 00h]
      43. 8.9.43  Page = 0x00 Address = 0x4A [Reset = 00h]
      44. 8.9.44  Page = 0x00 Address = 0x4B [Reset = 00h]
      45. 8.9.45  Page = 0x00 Address = 0x4F [Reset = 00h]
      46. 8.9.46  Page = 0x00 Address = 0x50 [Reset = 00h]
      47. 8.9.47  Page = 0x00 Address = 0x51 [Reset = 00h]
      48. 8.9.48  Page = 0x00 Address = 0x52 [Reset = 00h]
      49. 8.9.49  Page = 0x00 Address = 0x53 [Reset = 00h]
      50. 8.9.50  Page = 0x00 Address = 0x54 [Reset = 00h]
      51. 8.9.51  Page = 0x00 Address = 0x55 [Reset = 00h]
      52. 8.9.52  Page = 0x00 Address = 0x56 [Reset = 00h]
      53. 8.9.53  Page = 0x00 Address = 0x5C [Reset = 19h]
      54. 8.9.54  Page = 0x00 Address = 0x5D [Reset = 80h]
      55. 8.9.55  Page = 0x00 Address = 0x60 [Reset = 0Dh]
      56. 8.9.56  Page = 0x00 Address = 0x63 [Reset = 48]
      57. 8.9.57  Page = 0x00 Address = 0x65 [Reset = 08]
      58. 8.9.58  Page = 0x00 Address = 0x67 [Reset = 00h]
      59. 8.9.59  Page = 0x00 Address = 0x68 [Reset = 30h]
      60. 8.9.60  Page = 0x00 Address = 0x6A [Reset = 12h]
      61. 8.9.61  Page = 0x00 Address = 0x6B [Reset = 7Bh]
      62. 8.9.62  Page = 0x00 Address = 0x6C - 0x6E [Reset = 00001Ah]
      63. 8.9.63  Page = 0x00 Address = 0x6F [Reset = 00h]
      64. 8.9.64  Page = 0x00 Address = 0x70 [Reset = 96h]
      65. 8.9.65  Page = 0x00 Address = 0x71 [Reset = 02h]
      66. 8.9.66  Page = 0x00 Address = 0x73 [Reset = 08h]
      67. 8.9.67  Page = 0x00 Address = 0x77 [Reset = 00h]
      68. 8.9.68  Page = 0x00 Address = 0x7A [Reset = 60h]
      69. 8.9.69  Page = 0x00 Address = 0x7E [Reset = 00h]
      70. 8.9.70  Page = 0x00 Address = 0x7F [Reset = 00h]
      71. 8.9.71  Page = 0x01 Address = 0x17 [Reset = D0h]
      72. 8.9.72  Page = 0x01 Address = 0x19 [Reset = 60h]
      73. 8.9.73  Page = 0x01 Address = 0x28 [Reset = 00h]
      74. 8.9.74  Page = 0x01 Address = 0x35 [Reset = 75h]
      75. 8.9.75  Page = 0x01 Address = 0x36 [Reset = 08h]
      76. 8.9.76  Page = 0x01 Address = 0x3D [Reset = 00h]
      77. 8.9.77  Page = 0x01 Address = 0x3E [Reset = 00h]
      78. 8.9.78  Page = 0x01 Address = 0x3F [Reset = 00h]
      79. 8.9.79  Page = 0x01 Address = 0x40 [Reset = 00h]
      80. 8.9.80  Page = 0x01 Address = 0x41 [Reset = 00h]
      81. 8.9.81  Page = 0x01 Address = 0x42 [Reset = 00h]
      82. 8.9.82  Page = 0x01 Address = 0x43 [Reset = 00h]
      83. 8.9.83  Page = 0x01 Address = 0x44 [Reset = 00h]
      84. 8.9.84  Page = 0x01 Address = 0x45 [Reset = 00h]
      85. 8.9.85  Page = 0x01 Address = 0x47 [Reset = AB]
      86. 8.9.86  Page = 0x01 Address = 0x4C [Reset = 00h]
      87. 8.9.87  Page = 0x04 Address = 0x08 - 0x0B [Reset = 034A516Ch]
      88. 8.9.88  Page = 0x04 Address = 0x10 - 0x13 [Reset = 34000000h ]
      89. 8.9.89  Page = 0x04 Address = 0x14 - 0x17 [Reset = 14000000h ]
      90. 8.9.90  Page = 0x04 Address = 0x18 - 0x1B [Reset = 0D333333h]
      91. 8.9.91  Page = 0x04 Address = 0x1C - 0x1F [Reset = 10000000h]
      92. 8.9.92  Page = 0x04 Address = 0x20 - 0x23 [Reset = 0B999999h]
      93. 8.9.93  Page = 0x04 Address = 0x24 - 0x27 [Reset = 0ACCCCCDh]
      94. 8.9.94  Page = 0x04 Address = 0x40 - 0x43 [Reset = 721482C0h]
      95. 8.9.95  Page = 0x04 Address = 0x44 - 0x47 [Reset = 00000258h]
      96. 8.9.96  Page = 0x04 Address = 0x48 - 0x4B [Reset = 40BDB7C0h]
      97. 8.9.97  Page = 0x04 Address = 0x4C - 0x4F [Reset = 3982607Fh]
      98. 8.9.98  Page = 0x04 Address = 0x50 - 0x53 [Reset = 2D6A866Fh]
      99. 8.9.99  Page = 0x04 Address = 0x54 - 0x57 [Reset = 7C5E4E02h]
      100. 8.9.100 Page = 0x05 Address = 0x14 - 0x17 [Reset = 6CCCCCCCh]
      101. 8.9.101 Page = 0x05 Address = 0x1C - 0x1F [Reset = 4CCCCCCh]
      102. 8.9.102 Page = 0x05 Address = 0x20 - 0x23 [Reset = 00000180h]
      103. 8.9.103 Page = 0x05 Address = 0x24 - 0x27 [Reset = 00000000h]
      104. 8.9.104 Page = 0x05 Address = 0x28 - 0x2B [Reset = 79999999h]
      105. 8.9.105 Page = 0x05 Address = 0x2C - 0x2F [Reset = 0538EF34h]
      106. 8.9.106 Page = 0x05 Address = 0x30 - 0x33 [Reset = 40000000h]
      107. 8.9.107 Page = 0x05 Address = 0x34 - 0x37 [Reset = 65AC8C2Fh]
      108. 8.9.108 Page = 0x05 Address = 0x38 - 0x3B [Reset = 50C335D3h]
      109. 8.9.109 Page = 0x05 Address = 0x3C - 0x3F [Reset = 4026E73Ch]
      110. 8.9.110 Page = 0x05 Address = 0x40 - 0x43 [Reset = 32F52CFEh]
      111. 8.9.111 Page = 0x05 Address = 0x44 - 0x47 [Reset = 287A26C4h]
      112. 8.9.112 Page = 0x05 Address = 0x48 - 0x4B [Reset = 2026F30Fh]
      113. 8.9.113 Page = 0x05 Address = 0x4C - 0x4F [Reset = 198A1357h]
      114. 8.9.114 Page = 0x05 Address = 0x50 - 0x53 [Reset = 144960C5h]
      115. 8.9.115 Page = 0x05 Address = 0x54 - 0x57 [Reset = 101D3F2Dh]
      116. 8.9.116 Page = 0x05 Address = 0x58 - 0x5B [Reset = 0CCCCCCCh]
      117. 8.9.117 Page = 0x05 Address = 0x5C - 0x5F [Reset = 0A2AADD1h]
      118. 8.9.118 Page = 0x05 Address = 0x60 - 0x63 [Reset = 08138561h]
      119. 8.9.119 Page = 0x05 Address = 0x64 - 0x67 [Reset = 081385615h]
      120. 8.9.120 Page = 0x05 Address = 0x68 - 0x6B [Reset = 08138561h]
      121. 8.9.121 Page = 0x05 Address = 0x6C - 0x6F [Reset = 08138561h]
      122. 8.9.122 Page = 0x05 Address = 0x70 - 0x73 [Reset = 08138561h]
      123. 8.9.123 Page = 0x05 Address = 0x74 - 0x77 [Reset = 000000BFh]
      124. 8.9.124 Page = 0x05 Address = 0x78 - 0x7B [Reset = 0000000Eh]
      125. 8.9.125 Page = 0x05 Address = 0x7C - 0x7F [Reset = 66676869h]
      126. 8.9.126 Page = 0x06 Address = 0x08 - 0x0B [Reset = 00000000h ]
      127. 8.9.127 Page = 0x06 Address = 0x0C - 0x0F [Reset = 80800000h ]
      128. 8.9.128 Page = 0x06 Address = 0x10 - 0x13 [Reset = C0C00000h ]
      129. 8.9.129 Page = 0x06 Address = 0x14 - 0x17 [Reset = E0E00000h ]
      130. 8.9.130 Page = 0x06 Address = 0x18 - 0x1B [Reset = F0F00000h ]
      131. 8.9.131 Page = 0x06 Address = 0x1C - 0x1F [Reset = F8F80000h ]
      132. 8.9.132 Page = 0x06 Address = 0x20 - 0x23 [Reset = FCFC0000h ]
      133. 8.9.133 Page = 0x06 Address = 0x24 - 0x27 [Reset = FCFC0000h ]
      134. 8.9.134 Page = 0x06 Address = 0x28 - 0x2B [Reset = FCFC0000h ]
      135. 8.9.135 Page = 0x06 Address = 0x2C - 0x2F [Reset = 00000000h ]
      136. 8.9.136 Page = 0x06 Address = 0x30 - 0x33 [Reset = 80000000h ]
      137. 8.9.137 Page = 0x06 Address = 0x34 - 0x37 [Reset = C0000000h ]
      138. 8.9.138 Page = 0x06 Address = 0x38 - 0x3B [Reset = E0000000h ]
      139. 8.9.139 Page = 0x06 Address = 0x3C - 0x3F [Reset = F0000000h ]
      140. 8.9.140 Page = 0x06 Address = 0x40 - 0x43 [Reset = F8000000h ]
      141. 8.9.141 Page = 0x06 Address = 0x44 - 0x47 [Reset = FC000000h ]
      142. 8.9.142 Page = 0x06 Address = 0x48 - 0x4B [Reset = FE000000h ]
      143. 8.9.143 Page = 0x06 Address = 0x4C - 0x4F [Reset = FF000000h ]
      144. 8.9.144 Page = 0x06 Address = 0x50 - 0x53 [Reset = FF800000h ]
      145. 8.9.145 Page = 0x06 Address = 0x54 - 0x57 [Reset = FFC00000h]
      146. 8.9.146 Page = 0x06 Address = 0x58 - 0x5B [Reset = FFE00000h ]
      147. 8.9.147 Page = 0x06 Address = 0x5C - 0x5F [Reset = FFF00000h ]
      148. 8.9.148 Page = 0x06 Address = 0x60 - 0x63 [Reset = FFF00000h ]
      149. 8.9.149 Page = 0x06 Address = 0x64 - 0x67 [Reset = FFF00000h ]
      150. 8.9.150 Page = 0x06 Address = 0x68 - 0x6B [Reset = FFF00000h]
      151. 8.9.151 Page = 0x06 Address = 0x6C - 0x6F [Reset = FFF00000h ]
      152. 8.9.152 Page = 0x08 Address = 0x18 - 0x1B [Reset = 9C000000h ]
      153. 8.9.153 Page = 0x08 Address = 0x28 - 0x2B [Reset = 00000000h ]
      154. 8.9.154 Page = 0x0A Address = 0x48 - 0x4B [Reset = 9C000000h ]
      155. 8.9.155 Page = 0x0A Address = 0x58 - 0x5B [Reset = 00000000h ]
      156. 8.9.156 Page = 0xFD Address = 0x3E [Reset = 4Dh]
    10. 8.10 SDOUT Equations
  10. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
    3. 9.3 Design Requirements
    4. 9.4 Detailed Design Procedure
      1. 9.4.1 Mono/Stereo Configuration
      2. 9.4.2 EMI Passive Devices
    5. 9.5 Application Curves
  11. 10Initialization Set Up
    1. 10.1 Initial Device Configuration - Power Up and Software Reset
    2. 10.2 Initial Device Configuration - PWR_MODE0
    3. 10.3 Initial Device Configuration - PWR_MODE1
    4. 10.4 Initial Device Configuration - PWR_MODE2
    5. 10.5 Initial Device Configuration - PWR_MODE3
  12. 11Power Supply Recommendations
    1. 11.1 Power Supply Modes
  13. 12Layout
    1. 12.1 Layout Guidelines
    2. 12.2 Layout Example
  14. 13Device and Documentation Support
    1. 13.1 Receiving Notification of Documentation Updates
    2. 13.2 Community Resources
    3. 13.3 Trademarks
  15. 14Mechanical, Packaging, and Orderable Information
    1. 14.1 Package Option Addendum
    2. 14.2 Tape and Reel Information

Package Options

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

8.4.2.8 Noise Gate Mode

The TAS2781 has a noise-gate feature that monitors the input signal and powers down the Class-D when the signal goes below the set threshold set by NG_TH[1:0] bits for longer than the time set by NG_HYST_TIMER[2:0] bits of register from . When the signal goes above the threshold the Class-D will re-power in seven samples before the samples applied to the audio input interface reach the Class-D output.

The Noise Gate feature is enabled by setting NG_EN bit to high. Once enabled it is able to power up and down the channel within the device processing delay requiring no additional external control. Volume ramping can be also used during noise gate operations by setting NG_DVC_RP bit to low.

The noise gate can be configured with finer resolution at the expense of additional I2C writes. Use NGFR_EN bit to enable this mode and register bits NGFR_LVL[23:0] from to set the fine resolution. The fine resolution hysteresis is set using NGFR_HYST[18:3] register bits from and from .