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参数资料
| 型号： | TAS5508PAGR |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 消费家电 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP64 |
| 封装： | GREEN, PLASTIC, TQFP-64 |
| 文件页数： | 18/105页 |
| 文件大小： | 1286K |
| 代理商： | TAS5508PAGR |
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Contents
TAS5508
8-Channel Digital Audio PWM Processor
SLES091D – FEBRUARY 2004 – REVISED JULY 2009
www.ti.com
1
Introduction PWM
................................................................................................................ 9
1.1
Features
....................................................................................................................... 9
1.2
Overview
..................................................................................................................... 10
1.3
TAS5508 System Diagrams
.............................................................................................. 12
2
Description
........................................................................................................................ 15
2.1
Physical Characteristics
................................................................................................... 15
2.1.1
Terminal Assignments
.......................................................................................... 15
2.1.2
Ordering Information
............................................................................................ 15
2.1.3
Terminal Descriptions
........................................................................................... 16
2.2
TAS5508 Functional Description
......................................................................................... 18
2.2.1
Power Supply
.................................................................................................... 18
2.2.2
Clock, PLL, and Serial Data Interface
........................................................................ 18
2.2.2.1
Serial Audio Interface
................................................................................ 18
2.2.3
I
2C Serial-Control Interface
.................................................................................... 19
2.2.4
Device Control
................................................................................................... 19
2.2.5
Digital Audio Processor (DAP)
................................................................................. 19
2.2.5.1
TAS5508 Audio-Processing Configurations
....................................................... 19
2.2.5.2
TAS5508 Audio Signal-Processing Functions
.................................................... 20
2.3
TAS5508 DAP Architecture
............................................................................................... 21
2.3.1
TAS5508 DAP Architecture Diagrams
........................................................................ 21
2.3.2
I
2C Coefficient Number Formats
.............................................................................. 24
2.3.2.1
28-Bit 5.23 Number Format
......................................................................... 24
2.3.2.2
48-Bit 25.23 Number Format
........................................................................ 26
2.3.2.3
TAS5508 Audio Processing
......................................................................... 27
2.4
Input Crossbar Mixer
....................................................................................................... 28
2.5
Biquad Filters
............................................................................................................... 28
2.6
Bass and Treble Controls
................................................................................................. 29
2.7
Volume, Automute, and Mute
............................................................................................. 30
2.8
Automute and Mute
........................................................................................................ 30
2.9
Loudness Compensation
.................................................................................................. 31
2.9.1
Loudness Example
.............................................................................................. 32
2.10
Dynamic Range Control (DRC)
........................................................................................... 33
2.10.1
DRC Implementation
............................................................................................ 36
2.10.2
Compression/Expansion Coefficient Computation Engine Parameters
................................. 36
2.10.2.1
Threshold Parameter Computation
............................................................... 37
2.10.2.2
Offset Parameter Computation
.................................................................... 37
2.10.2.3
Slope Parameter Computation
.................................................................... 38
2.11
Output Mixer
................................................................................................................ 38
2.12
PWM
......................................................................................................................... 39
2.12.1
DC Blocking (High-Pass Enable/Disable)
.................................................................... 40
2.12.2
De-Emphasis Filter
.............................................................................................. 40
2.12.3
Power-Supply Volume Control (PSVC)
....................................................................... 40
2.12.4
AM Interference Avoidance
.................................................................................... 41
3
TAS5508 Controls and Status
.............................................................................................. 43
3.1
I
2C Status Registers
....................................................................................................... 43
3.1.1
General Status Register (0x01)
................................................................................ 43
3.1.2
Error Status Register (0x02)
................................................................................... 43
3.2
TAS5508 Pin Controls
..................................................................................................... 43
3.2.1
Reset (RESET)
.................................................................................................. 43
3.2.2
Power Down (PDN)
............................................................................................. 45
Contents
2
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