1
Introduction PWM
1.1
Features
TAS5508
8-Channel Digital Audio PWM Processor
www.ti.com
SLES091D – FEBRUARY 2004 – REVISED JULY 2009
Frequencies, and Second-Order Slopes
General Features
L, R, and C
–
Automated Operation With an Easy-to-Use
LS, RS
Control Interface
LR, RR
–
I2C Serial-Control Slave Interface
Sub
–
Integrated AM Interference-Avoidance
Circuitry
–
Configurable Loudness Compensation
–
Single, 3.3-V Power Supply
–
Two Dynamic Range Compressors With
Two Thresholds, Two Offsets, and Three
–
64-Pin TQFP Package
Slopes
–
5-V Tolerant Inputs
–
Seven Biquads Per Channel
Audio Input/Output
–
Full 8
=8 Input Crossbar Mixer. Each
–
Automatic Master Clock Rate and Data
Signal-Processing Channel Input Can Be
Sample Rate Detection
Any Ratio of the Eight Input Channels.
–
Eight Serial Audio Input Channels
–
8
=2 Output Mixer – Channels 1–6. Each
–
Eight PWM Audio Output Channels
Output Can Be Any Ratio of Any Two
Configurable as Six Channels With Stereo
Signal-Processed Channels.
Lineout or Eight Channels
–
8
=3 Output Mixer – Channels 7 and 8.
–
Line Output Is a PWM Output to Drive an
Each Output Can Be Any Ratio of Any
External Differential-Input Operational
Three Signal-Processed Channels.
Amplifier
–
Three Coefficient Sets Stored on the Device
–
Headphone PWM Output to Drive an
Can Be Selected Manually or Automatically
External Differential Amplifier Like the
(Based on Specific Data Rates).
TPA112
–
DC Blocking Filters
–
PWM Outputs Support Single-Ended and
–
Able to Support a Variety of Bass
Bridge-Tied Loads
Management Algorithms
–
32-, 38-, 44.1-, 48-, 88.2-, 96-, 176.4-, and
PWM Processing
192-kHz Sampling Rates
–
32-Bit Processing PWM Architecture With
–
Data Formats: 16-, 20-, or 24-Bit
40 Bits of Precision
Left-Justified, I2S, or Right-Justified Input
–
8
= Oversampling With Fifth-Order Noise
Data
Shaping at 32 kHz–48 kHz, 4
=
–
64-Fs Bit-Clock Rate
Oversampling at 88.2 kHz and 96 kHz, and
–
128-, 192-, 256-, 384-, 512-, and 768-Fs
2
= Oversampling at 176.4 kHz and 192 kHz
Master Clock Rates (Up to a Maximum of
–
>102-dB Dynamic Range
50 MHz)
–
THD+N < 0.1%
Audio Processing
–
20-Hz–20-kHz, Flat Noise Floor for 44.1-,
–
48-Bit Processing Architecture With 76 Bits
48-, 88.2-, 96-, 176.4-, and 192-kHz Data
of Precision for Most Audio Processing
Rates
Features
–
Digital De-Emphasis for 32-, 44.1-, and
–
Volume Control Range 36 dB to –127 dB
48-kHz Data Rates
Master Volume Control Range of 18 dB
–
Flexible Automute Logic With
to –100 dB
Programmable Threshold and Duration for
Eight Individual Channel Volume Control
Noise-Free Operation
Ranges of 18 dB to –127 dB
–
Intelligent AM Interference-Avoidance
–
Programmable Soft Volume and Mute
System Provides Clear AM Reception
Update Rates
–
Power-Supply Volume Control (PSVC)
–
Four Bass and Treble Tone Controls with
Support for Enhanced Dynamic Range in
=18-dB Range, Selectable Corner
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Instruments semiconductor products and disclaimers thereto appears at the end of this document.
PurePath Digital is a trademark of Texas Instruments.
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All other trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright 2004–2009, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.