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TAS5518CPAG Datasheet(PDF) 2 Page - Texas Instruments |
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TAS5518CPAG Datasheet(HTML) 2 Page - Texas Instruments |
2 / 103 page Contents TAS5518C 8-Channel Digital Audio PWM Processor SLES238A – SEPTEMBER 2008 – REVISED JULY 2009 www.ti.com 1 Introduction ......................................................................................................................... 9 1.1 Features ....................................................................................................................... 9 1.2 Overview ..................................................................................................................... 10 1.3 Changes From the TAS5518 to the TAS5518C ........................................................................ 12 1.4 TAS5518C System Diagrams ............................................................................................ 12 2 Description ........................................................................................................................ 14 2.1 Physical Characteristics ................................................................................................... 14 2.1.1 Terminal Assignments .......................................................................................... 14 2.1.2 Ordering Information ............................................................................................ 14 2.1.3 Terminal Descriptions ........................................................................................... 15 2.2 TAS5518C Functional Description ....................................................................................... 17 2.2.1 Power Supply .................................................................................................... 17 2.2.2 Clock, PLL, and Serial Data Interface ........................................................................ 17 2.2.2.1 Serial Audio Interface ................................................................................ 17 2.2.3 I 2C Serial-Control Interface .................................................................................... 18 2.2.4 Device Control ................................................................................................... 18 2.2.5 Digital Audio Processor (DAP) ................................................................................. 18 2.2.5.1 TAS5518C Audio-Processing Configurations ..................................................... 18 2.2.5.2 TAS5518C Audio Signal-Processing Functions .................................................. 19 2.3 TAS5518C DAP Architecture ............................................................................................. 20 2.3.1 TAS5518C DAP Architecture Diagrams ...................................................................... 20 2.3.2 I 2C Coefficient Number Formats .............................................................................. 23 2.3.2.1 28-Bit 5.23 Number Format ......................................................................... 23 2.3.2.2 48-Bit 25.23 Number Format ........................................................................ 25 2.3.2.3 TAS5518C Audio Processing ....................................................................... 26 2.4 Input Crossbar Mixer ....................................................................................................... 27 2.5 Biquad Filters ............................................................................................................... 27 2.6 Bass and Treble Controls ................................................................................................. 28 2.7 Volume, Automute, and Mute ............................................................................................. 29 2.8 Automute and Mute Channel Controls .................................................................................. 30 2.9 Loudness Compensation .................................................................................................. 30 2.9.1 Loudness Example .............................................................................................. 31 2.10 Dynamic Range Control (DRC) ........................................................................................... 32 2.10.1 DRC Implementation ............................................................................................ 35 2.10.2 Compression/Expansion Coefficient Computation Engine Parameters ................................. 35 2.10.2.1 Threshold Parameter Computation ............................................................... 36 2.10.2.2 Offset Parameter Computation .................................................................... 36 2.10.2.3 Slope Parameter Computation .................................................................... 37 2.11 Output Mixer ................................................................................................................ 37 2.12 PWM ......................................................................................................................... 38 2.12.1 DC Blocking (High-Pass Filter Enable/Disable) ............................................................. 39 2.12.2 De-Emphasis Filter .............................................................................................. 39 2.12.3 Power-Supply Volume Control (PSVC) ....................................................................... 39 2.12.4 AM Interference Avoidance .................................................................................... 40 3 TAS5518C Controls and Status ............................................................................................ 42 3.1 I 2C Status Registers ....................................................................................................... 42 3.1.1 General Status Register (0x01) ................................................................................ 42 3.1.2 Error Status Register (0x02) ................................................................................... 42 3.2 TAS5518C Pin Controls ................................................................................................... 42 3.2.1 Reset (RESET) .................................................................................................. 42 Contents 2 Submit Documentation Feedback Not Recommended For New Designs |
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