Datasheet

Serial Audio
Receiver
2x Stereo
Serial Audio
Receiver
2x Stereo
Serial Audio
Transciever
Stereo
4ch ASRC
4ch ASRC
Fixed Flow
Digital Audio
Processor
(DAP)
10 ch input
8ch Processor
8ch Output Mixer
Clocks
(Osc, PLL
etc)
12.288
8ch PWM
Generator
+ Headphone
(PWM)
Bypass
MCU
I2C
Control
Power
Supply
Volume
Control
(PSVC)
Energy
Manager
(EMO)
Power
TAS5548
www.ti.com SLES270 –NOVEMBER 2012
1.2 Overview
Figure 1-1. Functional Block Diagram
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.
The TAS5548 is designed to interface seamlessly with most digital audio decoders. 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
The TAS5548 can drive eight channels of H-bridge power stages. Texas Instruments Power Stages are
designed to work seamlessly with the TAS5548. The TAS5548 supports either the single-ended or bridge-
tied-load configuration. 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 8× oversampling combined with the fourth-order noise shaper provides a broad,
flat noise floor and excellent dynamic range from 20 Hz to 32 kHz.
The TAS5548 can be both an I2S Master or I2S Slave. The external crystal is used to drive the DAP
processor, and can be used to drive the I2S Clocks, out of the device. The TAS5548 accepts master clock
rates of 64, 128, 192, 256, 384, 512, and 768 f
S
. The TAS5548 accepts a 64-f
S
bit clock. External Crystal
used must be 12.288MHz.
TAS5548 also features power-supply-volume-control (PSVC) 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.
Copyright © 2012, Texas Instruments Incorporated Description 3
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