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User's Guide

SLAU327–October 2010

TLV320DAC3202EVM

This user's guide describes the characteristics, operation, and use of the TLV320DAC3202EVM. The

TLV320DAC3202EVM provides a simplified platform to evaluate the performance and functionality of the

TLV320DAC3202 low-power headset IC. A complete circuit description, schematic diagram, and bill of

materials are included.

The following related documents are available through the Texas Instruments web site at www.ti.com.

Device Literature Number

TPS62044 SLVS463

TAS1020B SLES025

TLV320DAC3202 SLAS726

Contents

1 TLV320DAC3202EVM Overview ......................................................................................... 2

1.1 Features ............................................................................................................. 2

1.2 Introduction ......................................................................................................... 2

2 Description ................................................................................................................... 2

2.1 Top Side Components ............................................................................................. 2

2.2 Bottom Side Components ......................................................................................... 3

2.3 DC Ampere Meter Connection ................................................................................... 4

3 Getting Started .............................................................................................................. 5

4 Recommended Media Player .............................................................................................. 6

5 Performance Testing ....................................................................................................... 6

6 Generating Wave Files ..................................................................................................... 7

7 Schematic and BOM ........................................................................................................ 8

7.1 Schematic ........................................................................................................... 8

7.2 Bill of Materials ..................................................................................................... 9

List of Figures

1 TLV320DAC3202EVM: Top Side ......................................................................................... 2

2 TLV320DAC3202EVM: Bottom Side ..................................................................................... 3

3 DC Ampere Meter Connection ............................................................................................ 4

4 Sounds and Audio Devices Panel ........................................................................................ 5

5 System Volume Controls................................................................................................... 5

6 AP Performance Testing ................................................................................................... 6

7 Crosstalk FFT ............................................................................................................... 7

8 TLV320DAC3202EVM Schematic ........................................................................................ 8

Apple, QuickTime are registered trademarks of Apple Inc.

Audio Precision is a registered trademark of Audio Precision Inc.

Microsoft, Windows, Windows Media Player are registered trademarks of Microsoft Corporation.

S, I

C are trademarks of NXP Semiconductors.

All other trademarks are the property of their respective owners.

SLAU327–October 2010 TLV320DAC3202EVM

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Summary of content (11 pages)

PAGE 1
User's Guide SLAU327 – October 2010 TLV320DAC3202EVM This user's guide describes the characteristics, operation, and use of the TLV320DAC3202EVM. The TLV320DAC3202EVM provides a simplified platform to evaluate the performance and functionality of the TLV320DAC3202 low-power headset IC. A complete circuit description, schematic diagram, and bill of materials are included. The following related documents are available through the Texas Instruments web site at www.ti.com.
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TLV320DAC3202EVM Overview www.ti.com 1 TLV320DAC3202EVM Overview 1.1 Features TLV320DAC3202EVM: • A USB stick version of the TLV320DAC3202EVM for easy operation • USB connection to PC provides ability to stream audio data for evaluation • Power to TLV320DAC3202 can be supplied from a PC USB connection, or an external battery by changing the jumper connection • A 3.
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Description www.ti.com The SMPS is a 1.2-A/1.25-MHz step-down converter that provides approximately 90% efficiency with a 3.6-V input voltage. Refer to the TLV320DAC3202 product data sheet for different input voltage options. The three-pin jumper provides users the option to power the TLV320DAC3202 AVDD pin. The default setting is connecting the jumper to the + and NC terminals, as illustrated in Figure 1.
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Description 2.3 www.ti.com DC Ampere Meter Connection Using the dc ampere meter connection, one can measure the current drawn from the SMPS by connecting the 3-pin header to the terminal as shown in Figure 3. This ampere meter is limited to less than 10 mA; consequently, playing music at a high volume could cause unpleasant sounds. Figure 3.
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Getting Started www.ti.com 3 Getting Started Users can quickly evaluate the TLV320DAC3202EVM performance by simply connecting the EVM to a laptop or PC with an available USB port. USB enumeration begins; under the Sounds and Audio Devices Properties menu in the Microsoft® Windows® Control Panel (as Figure 4 shows), an MIS-iSOLUTION-USBEVM device is listed when the EVM is detected. Connect a set of headphones to the 3.5-mm audio jack and then start playing audio with the media player.
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Recommended Media Player 4 www.ti.com Recommended Media Player The Apple® QuickTime® media player is recommended to perform listening tests because it does not initiate or terminate USB communications abruptly as does the Windows Media Player®. Abrupt signal processing could result in a clicking sound on the headphone side.
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Generating Wave Files www.ti.com Figure 7 illustrates typical crosstalk performance. Figure 7. Crosstalk FFT 6 Generating Wave Files In order to generate the wave files for the performance testing, extract all the files from the Wave_files.zip to a designated folder on your local PC or laptop. The compressed file contains three batch files that have been created; double-click the compressed file to automatically generate the wave files (refer to Table 1).
PAGE 8
Schematic and BOM 7 www.ti.com Schematic and BOM This section contains the schematic diagram for the TLV320DAC3202EVM. The bill of materials is listed in Table 2. 7.1 Schematic The TLV320DAC3202 EVM schematic is shown in Figure 8. EEPROM +1.8V U8 +3.3V U1 DNP +3.3V R9 200K 10uF/6.3V R6 2.7K R7 2.7K 0.1uF/6.3V POWER 7 8 6 5 C16 VBAT DVDD 3 2 1 U5 2 3 1 C14 22uF 6 4 11 VIN1 VIN2 EN MODE GND1 L1 SW2 SW1 FB PGND2 PGND1 R11 2.7K 6.2uH 8 7 5 R10 2.
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Schematic and BOM www.ti.com 7.2 Bill of Materials Table 2. TLV320DAC3202EVM Bill of Materials Item No Count RefDes Value Size Part Number MFR 1 10 C6, C8, C11, C12, C13,C16, C17, C18, C19, C29 0.1 mF X7R, ±10%, 16 V Capacitor Description 0402 C0402X7R160-104KNE Venkel 2 1 C7 1.0 mF X5R, ±10%, 10 V Capacitor 0402 GRM155R61A105KE15 D Murata Electronics 3 1 C20 1.
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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.
PAGE 11
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.