TAS5548 Datasheet, PDF (1/116 Pages) Texas Instruments – 8-Channel HD Compatible Audio Processor with ASRC and PWM Output

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TAS5548
SLES270A – NOVEMBER 2012 – REVISED APRIL 2015
TAS5548 8-Channel HD Compatible Audio Processor with ASRC and PWM Output
1 Features
•1 General Features
– 8ch Asynchronous Sample Rate Converter
– 8 Channel Audio Processing for 32-192 kHz
(ARSC to 96kHz)
– 4 Channel Native Audio Processing at 192kHZ
– 30 kHz Audio Bandwidth for DTS-HD
Compatibility
– Energy Manager for Overall System Power
Control
– Power Supply Volume Control
• Audio Input or Output
– Up to Five Synchronous Serial Audio Inputs
(10 Channels)
– Up to One Synchronous Serial Audio Outputs
(2 Channels)
– I2S Master Mode When Used With External
Crystal
– Slave Mode 32-192KHz With Auto/Manual
Sample Rate Detection
– Eight Differential PWM Output That can
Support AD or BD Modulation
– Two Differential PWM Headphone Outputs
– I2S Out for External Wireless Sub
– PWM Output Supports Single Ended (S.E.) or
Bridge Tied Load (BTL)
• Audio Processing
– Volume Control Range 18 dB to –127 dB
(Master and Eight Channel Volume)
– Bass and Treble Tone Controls With ±18-dB
Range, Selectable Corner Frequencies
– Configurable Loudness Compensation
– Two Dynamic Range Compressors With Two
Thresholds, Two Offsets, and Three Slopes
– Seven Biquads Per Channel
• PWM Processing
– >105-dB Dynamic Range
– THD+N < 0.1% (0–40 kHz)
– 20-Hz–40-kHz, Flat Noise Floor for 32KHz -
192KHz
– Flexible Automute Logic With Programmable
Threshold and Duration for Noise-Free
Operation
– Power-Supply Volume Control (PSVC) in High-
Performance Applications
– Adjustable Modulation Limit
2 Applications
Interface Seamlessly with Most Digital Audio
Decoders
3 Description
The TAS5548 is an 8-channel Digital Pulse Width
Modulator (PWM) with Digital Audio Processing and
Sample Rate Converter that provides both advanced
performance and a high level of system integration.
TAS5548 is designed to support DTS-HD
specification Blu-ray HTiB applications. The ASRC
consists of two separate modules which handle 4
channels each. Therefore, it is possible to support up
to two different input sampling rates.
Texas Instruments Power Stages are designed to
work seamlessly with the TAS5548. The TAS5548
also provides a high-performance, differential output
to drive an external, differential-input, analog
headphone amplifier.
The TAS5548 supports AD, BD, and ternary
modulation operating at a 384-kHz switching rate for
48-, 96-, and 192-kHz data. The external crystal used
must be 12.288 MHz. The TAS5548 also features
power-supply-volume-control (PSVC), which
improves dynamic range at lower power level and
can be used as part of a Class G power supply when
used with closed-loop PWM input power stages.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TAS5548
HTSSOP (56) 14.00 mm x 6.10 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
Block Diagram
SDIN1
SDIN2
SCLK
LRCLK
SDIN2-1
SDIN2-2
SCLKO /SCLKIN_2
LRCLKO / LRCKIN_2
SDOUT/SDIN5
Serial Audio
Receiver
2x Stereo
4ch ASRC
Serial Audio
Receiver
2x Stereo
Bypass
4ch ASRC
Fixed Flow
Digital Audio
Processor
(DAP)
10ch input
8ch Processor
8ch Output Mixer
8ch PWM
Generator
+ Headphone
(PWM)
Serial Audio
Transciever
Stereo
Clocks
(Osc, PLL
etc)
12.288
Energy
Manager
(EMO)
Power
Supply
Volume
Control
(PSVC)
I2C
Control
MCU
Power
PWM_x_1
through 8
/BKND_ERR
VALID
PWM_HPM_L&R
PWM_HPP_L&R
/MUTE
/PDN
DVSS2
DVSS1
DVDD2
DVDD1
AVSS_PWM
AVSS
AVDD_PWM
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.