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User's Guide

SLOU304–December 2010

25W Digital Input Amplifier with EQ and 2-Band DRC

This manual describes the operation of the TAS5715EVM to evaluate the performance of the TAS5715

integrated digital audio power amplifier. The main contents of this document are:

• How to properly connect a TAS5715 Evaluation Module (EVM) and the details of the EVM

• How to install and use the GUI to program the TAS5715EVM

• How to use the audio processing features such as EQ and Dynamic Range Control (DRC)

• Quick-Start Guide for the common modes in which TAS5715EVM can be used

Contents

1 Overview ..................................................................................................................... 2

1.1 TAS5715EVM and MC57xxPSIA Features ..................................................................... 3

2 Installation .................................................................................................................... 3

2.1 EVM Installation .................................................................................................... 3

2.2 Software Installation ............................................................................................... 6

3 Using the EVM Software ................................................................................................... 7

3.1 Connect the GUI to the EVM ..................................................................................... 7

3.2 I

C Memory Tool ................................................................................................... 7

3.3 Volume Function ................................................................................................... 8

3.4 Biquad GUI ......................................................................................................... 8

3.5 DRC GUI ........................................................................................................... 10

4 Jumpers and Control Utilities on MC57xxPSIA board ................................................................ 12

4.1 RCA/OPTICAL Jumpers ......................................................................................... 12

4.2 Switches ........................................................................................................... 12

4.3 LED Indicators .................................................................................................... 12

5 Board Layouts, Bill of Materials, and Schematic ...................................................................... 12

5.1 TAS5715EVM and MC57xxPSIA Board Layouts ............................................................ 12

5.2 Bill of Materials .................................................................................................... 14

5.3 Schematics ........................................................................................................ 15

List of Figures

1 TAS5715EVM Printed-Circuit Board ..................................................................................... 2

2 Complete System and EVM Signal Path Overview .................................................................... 2

3 General Connection Picture ............................................................................................... 3

4 Connecting TAS5715EVM to MC57xxPSIA ............................................................................. 4

5 BTL Connection ............................................................................................................. 5

6 Process Flow ................................................................................................................ 6

7 Main GUI Display ........................................................................................................... 7

8 Memory Tool Window ...................................................................................................... 7

9 Volume Control.............................................................................................................. 8

10 Selecting Biquad GUI....................................................................................................... 8

11 Biquad GUI Window ........................................................................................................ 9

12 DRC Options ............................................................................................................... 10

13 Advanced DRC Options .................................................................................................. 10

Equibit is a trademark of Texas Instruments.

C is a trademark of Philips Corporation.

SLOU304–December 2010 25W Digital Input Amplifier with EQ and 2-Band DRC

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Summary of content (21 pages)

PAGE 1
User's Guide SLOU304 – December 2010 25W Digital Input Amplifier with EQ and 2-Band DRC This manual describes the operation of the TAS5715EVM to evaluate the performance of the TAS5715 integrated digital audio power amplifier.
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Overview www.ti.com 14 TAS5715EVM Top Composite Assembly .............................................................................. 12 15 TAS5715EVM Top Copper Assembly .................................................................................. 13 16 MC57xxPSIA Top Assembly ............................................................................................. 13 List of Tables 1 1 Recommended Power Supplies..........................................................................
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Installation www.ti.com 1.
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Installation www.ti.com Figure 4. Connecting TAS5715EVM to MC57xxPSIA 2.1.2 PSU Interface The TAS5715EVM is powered by two power supplies connected to the MC57xx controller board: a 5V power supply (VIN), and a 8V-to-26V (PVDD) power supply. The 3.3V level is generated from the 5V supply by an on-board voltage regulator. NOTE: The power-supply cable length must be minimized. Increasing the length of the PSU cable increases the distortion of the amplifier at high output levels and low frequencies.
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Installation www.ti.com + OUT A – OUT B Figure 5. BTL Connection 2.1.4 USB Interface The TAS5715 registers are accessed through I2C™ bus lines SDA and SCL. The USB circuit and USB connector on the MC57xxPSIA board facilitates the connection between a host computer and the device. The EVM USB circuit is powered by the 5V USB line of the host PC and is independent of the power supplies available on the board. The USB device that is used is a TAS1020B from Texas Instruments. 2.1.
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Installation 2.2 www.ti.com Software Installation Download the TAS57x GDE from the TI Web site. The TI Web site always has the latest release and any updates to versions of the GUI. Execute the GUI install program, Setup.exe. Once the program is installed, the program group and shortcut icon is created in Start → Program → Texas Instruments Inc → TAS57x GDE. The GUI launches as shown in Figure 7. Select the appropriate tab; in this case, select TAS5715 tab. It has two subwindows.
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Using the EVM Software www.ti.com Figure 7. Main GUI Display 3 Using the EVM Software 3.1 Connect the GUI to the EVM Open the GUI. Select the properties window: 1-band or 2-band DRC and Stereo or Woofer. Stereo is selected for BTL and Woofer is selected for PBTL Mode. This sends the initialization commands to the device. Master volume is in mute. Select the master volume function. Type the required volume in the properties window. At this time, audio, if connected properly, plays through the device.
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Using the EVM Software www.ti.com I2C registers can be written or read using this tool. The I2C command file can be sent by selecting the command file and Execute command. 3.3 Volume Function The Individual and Master volume can be selected, and the required volume value can be entered in the Properties Window after selecting the function with the mouse (see Figure 9). Figure 9. Volume Control 3.4 Biquad GUI Using the left mouse button, select the PEQ block.
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Using the EVM Software www.ti.com Figure 11. Biquad GUI Window A check mark selects the Biquad. If not selected, the Biquad is in ALL PASS Mode. The frequency response for the current settings can be viewed and adjusted in Frequency Response Window Tab (Figure 11). The individual Biquad gains must be within ±12db. Apply from the filter data window sends all the three banks of coefficients (providing auto bank is enabled).
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Using the EVM Software 3.5 www.ti.com DRC GUI The TAS5715 supports 1-band and 2-band DRC. Select one of the DRC modes from the Properties window. Then set the DRC threshold for each band by double-clicking the UPPERBAND or LOWERBAND block and adjusting the sliders as shown in Figure 12. Figure 12. DRC Options The crossover frequency for the 2-band DRC by default is 300Hz. This can be modified by entering a new value in the Properties window.
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Using the EVM Software www.ti.com 3.5.1 MODULATION SCHEMES Using The FAULT PIN As An Error Indicator: The A_SEL_FAULTZ pin is the I2C device address select by default. To re-define this pin as an output, write '1' to bit D1 of reg 0X05. Once re-programmed as output, this pin indicates a fault condition. Output will go low for Overcurrent (OC) or undervoltage (UVP) error or overtemperature error (OTE) or overvoltage error Common Configurations: 1. 2 × BTL BD Mode 2.
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Jumpers and Control Utilities on MC57xxPSIA board 4 Jumpers and Control Utilities on MC57xxPSIA board 4.1 RCA/OPTICAL Jumpers www.ti.com Select the jumper to reflect the source whether it is RCA or OPTICAL. 4.2 Switches JP1 on the daughter card is for PBTL select. Jumper IN means non-PBTL mode. For PBTL, remove this jumper. Reset is an active-low function. Pressing the master reset switch (S2) resets the TAS5715 device; USB RESET (S1) resets the USB bus.
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www.ti.com Board Layouts, Bill of Materials, and Schematic Figure 15. TAS5715EVM Top Copper Assembly Figure 16.
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Board Layouts, Bill of Materials, and Schematic 5.2 www.ti.com Bill of Materials Table 2. Bill of Materials for TAS5715EVM MANU Part No. Qty Ref Des Vendor Part No.
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SLOU304 – December 2010 Submit Documentation Feedback © 2010, Texas Instruments Incorporated 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 J1 PGND PVDD AVDD MC57xx CONTROLLER BOARD PGND 15.0K 0603 R2 PGND 4.7ufd/6.3V 0603 C3 0.1ufd/10V 0603 C4 0.0 0603 PGND PGND R3 AVDD PGND PGND 10.0K 0603 R6 18.2K 0603 R5 10.0K 0603 R4 17 16 15 14 13 27 C6 28 29 8 7 6 5 30 C7 31 32 HTQFP48-PHP C8 33 U1 TAS5715PHP 9 4 C16 C9 3 34 2 35 0.
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HPL-IN EN_HP HPR-IN FROM TAS5715 25W Digital Input Amplifier with EQ and 2-Band DRC © 2010, Texas Instruments Incorporated 0.33ufd/16V 0603 C39 HTSSOP28-PWP DRV604PWP U2 0.33ufd/16V 0603 25 4 26 3 27 2 28 1 PGND R18 470pfd/50V 0603 30.0K 0603 R17 43.0K 0603 C40 R16 15.0K 0603 2.2ufd/10V 0603 C38 24 5 PGND 23 6 PGND 22 7 47pfd/50V 0603 C41 PGND 21 8 PGND 20 9 PGND 19 10 PGND 18 11 PGND PGND 470pfd/50V 0603 C36 47pfd/50V 0603 C37 17 12 43.0K 0603 R15 16 13 15.
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Board Layouts, Bill of Materials, and Schematic SLOU304 – December 2010 Submit Documentation Feedback USB I/O (A0 IN DEFAULT) USB BOOT EPROM USB INTERFACE USB RESET DECOUPLING U3 TAS1020BPFB TO EVM BOARD ENGINEERING EVALUATION ONLY www.ti.
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25W Digital Input Amplifier with EQ and 2-Band DRC © 2010, Texas Instruments Incorporated 5V POWER INPUT MASTER RESET 1-2: OPTO INPUT 2-3: RCA INPUT SPDIF INPUT SELECT SPDIF INPUT SPDIF RECEIVER TO ADC 3.
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SLOU304 – December 2010 Submit Documentation Feedback © 2010, Texas Instruments Incorporated HIGH POWER INPUT FROM VR1 FROM MASETER RESET FROM USB FROM SPDIF ANALOG INPUTS IN: LIN/RIN = 1Vrms MAX. OUT: LIN/RIN = 2Vrms MAX. NOTES ON JUMPERS ADC / CONNECTOR I/O 3.3V DECOUPLING PCM1808PW ADC 5V DECOUPLING (SDIN2) (SDIN1) MUTE PDN FAULT MC012 (1-2) PSIA (2-3) TO EVM BOARDS ENGINEERING EVALUATION ONLY www.ti.
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EVALUATION BOARD/KIT IMPORTANT NOTICE Texas Instruments (TI) provides the enclosed product(s) under the following conditions: This evaluation board/kit is intended for use for ENGINEERING DEVELOPMENT, DEMONSTRATION, OR EVALUATION PURPOSES ONLY and is not considered by TI to be a finished end-product fit for general consumer use. Persons handling the product(s) must have electronics training and observe good engineering practice standards.
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IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.