www.ti.com
SLOS550B – DECEMBER 2007 – REVISED DECEMBER 2010
20-W Stereo Digital Audio Power Amplifier with EQ and DRC
1
FEATURES
–
Adaptive Biquad Coefficients for EQ and
DRC Filters
23
Audio Input/Output
–
Programmable Input and Output Mixers
–
20-W into an 8-
Load From an 18-V Supply
–
Loudness Compensation for Subwoofer
–
Two Serial Audio Inputs (Four Audio
Channels)
–
Automatic Sample-Rate Detection and
Coefficient Banking
–
Supports Multiple Output Configurations:
General Features
–
2-Ch Bridged Outputs (20 W × 2)
–
Serial Control Interface Operational Without
–
4-Ch Single-Ended Outputs (10 W × 4)
MCLK
–
2-Ch Single-Ended + 1-Ch Bridged (2.1)
–
Factory-Trimmed Internal Oscillator Avoids
(10 W × 2 + 20 W)
the Need for External Crystal
Closed Loop Power Stage Architecture
–
Surface Mount, 64-Terminal, 10-mm ×
–
Improved PSRR Reduces Power Supply
10-mm HTQFP Package
Performance Requirements
–
Thermal and Short-Circuit Protection
–
Higher Damping Factor Provides for
Tighter, More Accurate Sound With
DESCRIPTION
Improved Bass Response
The TAS5706 is a 20-W, efficient, digital audio power
–
Constant Output Power Over Variation in
amplifier for driving stereo bridged-tied speakers. Two
Supply
serial data inputs allow processing of up to four
Wide PVCC Range From (10 V to 26 V)
discrete audio channels and seamless integration to
–
No Separate Supply Required for Gate
most digital audio processors and MPEG decoders,
Drive
accepting a wide range of input data and clock rates.
A
fully
programmable
data
path
allows
these
Supports 32-kHz–192-kHz Sample Rates
channels to be routed to the internal speaker drivers
(LJ/RJ/I2S)
or output via the subwoofer or headphone PWM
Headphone PWM Outputs
outputs.
Subwoofer PWM Outputs
The TAS5706 is a slave-only device receiving all
AM Interference Avoidance Support
clocks from external sources. The TAS5706 operates
at a 384-kHz switching rate for 32-, 48-, 96-, and
Audio/PWM Processing
192-kHz data, and at a 352.8 kHz switching rate for
–
Independent Channel Volume Controls With
44.1-,
88.2-,
and
176.4-kHz
data.
The
8×
24-dB to –100-dB Range—Soft Mute (50%
oversampling combined with the fourth-order noise
Duty Cycle)
shaper provides a flat noise floor and excellent
–
Programmable Dynamic Range Control
dynamic range from 20 Hz to 20 kHz.
–
16 Programmable Biquads for Speaker
Equalization
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
2
PurePath Digital is a trademark of Texas Instruments.
3
All other trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright 2007–2010, 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.