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TA5704EVM
User Manual
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Texas Instruments TA5704EVM User Manual

TA5704EVM 4-Channel Digital Audio Power Amplifier with Hardware Control
User's Guide
Literature Number: SLOU224
April 2008
2 SLOU224 – April 2008
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Contents
1 Overview ............................................................................................................................. 7
1.1 TAS5704EVM Features .................................................................................................. 8
1.2 Basic Tools for Initial Board Power up ................................................................................. 9
2 System Interfaces ................................................................................................................ 9
2.1 PSU Interface .............................................................................................................. 9
2.2 PSC Connector .......................................................................................................... 10
2.3 Loudspeaker and Subwoofer Connectors (2-Channel BTL Configuration) ...................................... 10
2.4 Digital Audio Interface SPDIF (J1/OPTO) ............................................................................ 10
2.5 ADC Interface ............................................................................................................ 11
2.6 Board Power up General Guidelines .................................................................................. 11
3 Jumpers and Control Utilities .............................................................................................. 11
3.1 Clock Frequency Change Jumper ..................................................................................... 11
3.2 SPDIF/PSIA Utilization Jumpers ....................................................................................... 11
3.3 Data Routing Jumpers .................................................................................................. 11
3.4 GAIN Jumpers ........................................................................................................... 12
3.5 Data Format Jumpers ................................................................................................... 12
3.6 CONFIG Jumpers ....................................................................................................... 12
3.7 Switches .................................................................................................................. 13
4 Board Layout, Bill of Material, and Schematics ...................................................................... 14
4.1 TAS5704EVM Board Layout, Top Composite View ................................................................ 14
4.2 TAS5704EVM Board Layout, Top Layer View ....................................................................... 15
4.3 TAS5704EVM Board Layout, Bottom Layer View ................................................................... 16
4.4 Bill of Materials ........................................................................................................... 17
4.5 Schematic ................................................................................................................ 19
Important Notices ............................................................................................................... 20
SLOU224 – April 2008 Table of Contents 3
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List of Figures
1 2-Channel (BTL) Configuration with External Subwoofer EVM (TAS5601EVM2) .................................. 7
2 2-Channel (SE) + 1-Channel (BTL) Configuration ...................................................................... 8
3 4-Channel (SE) Configuration .............................................................................................. 8
4 Top Composite View of TAS5704EVM ................................................................................... 9
5 Top Layer Composite ...................................................................................................... 14
6 Top Layer .................................................................................................................... 15
7 Bottom Layer ................................................................................................................ 16
List of Tables
1 Recommended Power Supplies .......................................................................................... 10
2 TAS5704 SDINx Data Source ............................................................................................ 11
3 TAS5704 Gain Configuration ............................................................................................. 12
4 TAS5704 Data Format ..................................................................................................... 12
5 DIR9001 SPDIF Output Data Format .................................................................................... 12
6 TAS5704 Output Configuration ........................................................................................... 13
7 Bill of Materials for TAS5704EVM ....................................................................................... 17
4 List of Figures SLOU224 – April 2008
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About This Manual
This manual describes the operation of the TAS5704EVM evaluation module from Texas Instruments.
How to Use this Manual
This document contains the following chapters
• Chapter 1 – Overview
• Chapter 2 – System Interfaces
• Chapter 3 – Jumpers and Control Utilities on TAS5704
• Chapter 4 – TAS5704EVM Layout
Information About Cautions and Warnings
This manual may contain cautions and warnings.
This is an example of a caution statement. A caution statement describes a situation that could potentially damage your
software or equipment.

Preface

SLOU224 – April 2008
Read This First
CAUTION
This is an example of a warning statement. A warning statement describes a situation that could potentially
cause harm to you
The information in a caution or a warning is provided for your protection. Please read each caution and warning carefully.
Related Documentation from Texas Instruments
The following table contains a list of data manuals that have detailed descriptions of the integrated circuits used in the design of the TAS5704EVM. The data manuals can be obtained at the URL http://www.ti.com .
WARNING
Part Number Literature Number
TAS5704 Data Sheet SLOS563
DIR9001PW SLES198
PCM1808PW SLES177 A
TPS76733QD SLVS2081
TAS5601 SLAS585
SLOU224 – April 2008 Preface 5
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Additional Documentation
Additional Documentation
• General Application Notes
EVM Warnings / Restrictions and FCC Warning
See the Evaluation Board/Kit Warnings and Restrictions page towards the end of this User's Guide.
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6 Read This First SLOU224 – April 2008
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SPDIF/
Optical,Coax
2CH AnalogInput
fromOtherSource/
DigitalOut
TAS5704
TAS5601EVM2
Subwofer
PWMout
Left
Right
I2S
TA5704EVM 4-Channel Digital Audio Power Amplifier with
Hardware Control

1 Overview

TAS5704 customer evaluation module (EVM) demonstrates the integrated circuit (IC) TAS5704 from Texas Instruments (TI).
TAS5704 is a 4-channel device with an I2S/RJ/LJ digital audio stream input and amplified PWM signal out. The subwoofer PWM signal is provided to an external class D power stage (TAS5601), which uses a LC demodulation filter to drive a subwoofer. For detail information about the TAS5704 device review the device data sheet, document number SLOS563 .
TAS5704 is designed to drive two 8- Ω loudspeakers up to 20W per channel (10%THD+N) in a BTL configuration. The TAS5704EVM can also be configured to drive four, 4- Ω speakers in a single-ended (SE) configuration. Finally, the TAS5704EVM can be configured to drive 2 single-ended speakers plus 1 bridge-tied speaker (2.1 mode). Review the board schematic, and TAS5601 documents for additional information and more specific application information on the subwoofer daughter card and connector.
TAS5704EVM, together with other TI components on this board, is a complete 4 channel digital audio amplifier system, which includes digital input (SPDIF), analog inputs via ADC, and other features like mute, power down, output configuration control, format control, and gain control.
User's Guide
SLOU224 – April 2008
SLOU224 – April 2008 TA5704EVM 4-Channel Digital Audio Power Amplifier with Hardware Control 7
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Figure 1. 2-Channel (BTL) Configuration with External Subwoofer EVM (TAS5601EVM2)
SPDIF/
Optical,Coax
2CH AnalogInput
fromOtherSource/
DigitalOut
TAS5704
Left
Right
I2S
Sub
LC+
Cap
LC+
Cap
LC
SPDIF/
Optical,Coax
2CH AnalogInput
fromOtherSource/
DigitalOut
TAS5704
LFront
RFront
I2S
LC+
Cap
LC+
Cap
LRear
RRear
LC+
Cap
LC+
Cap
Overview
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Figure 2. 2-Channel (SE) + 1-Channel (BTL) Configuration

1.1 TAS5704EVM Features

8 TA5704EVM 4-Channel Digital Audio Power Amplifier with Hardware Control SLOU224 – April 2008
Figure 3. 4-Channel (SE) Configuration
• Self-contained protection systems and control pins
• Standard I2S data input using optical or RCA inputs
• Analog input through analog to digital converter
• Subwoofer connection. PWM terminal to provide signal and power to an external subwoofer board
(TAS5601EVM2)
• Double-sided plated-through PCB layout, 2oz copper, 2mm.
• Access to control signal gain, output configuration, and data format on the EVM board using jumpers
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System Interfaces
Figure 4. Top Composite View of TAS5704EVM

1.2 Basic Tools for Initial Board Power up

• Up to 26V, 3A power supply (PVCC)
• 5V, 500mA power supply (VIN)
• Banana cables for power supplies and speakers
• Optical or coaxial cable for SPDIF interface based on signal source
• Two 8 Ω speakers (BTL) or 4 Ω speakers (SE). Resistive loads can also be used
• Optional: TAS5601EVM2 (for subwoofer connection when using BTL configuration)

2 System Interfaces

This chapter describes the TAS5704EVM board in regards to power supply (PSU) and system interfaces.

2.1 PSU Interface

The TAS5704EVM module is powered using two power supply sources a 10–26V (PVCC) power supply and a 5V (VIN) power supply. The 3.3V voltage levels are generated on the board using voltage regulators from VIN supply.
Note: The length of power supply cable must be minimized. Increasing length of PSU cable is
equal to increasing the distortion for the amplifier at high output levels and low frequencies.
Maximum output stage supply voltage depends on the speaker load resistance. Check the recommended maximum supply voltage in the TAS5704 data sheet (SLOS563 ).
SLOU224 – April 2008 TA5704EVM 4-Channel Digital Audio Power Amplifier with Hardware Control 9
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