Texas Instruments DEM-DAI3793A manual About This Manual How to Use This Manual

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Preface

SBAU127 – July 2007

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About This Manual

This document provides the information needed to set up and operate the DEM-DAI3793A/3794A EVM evaluation module, a test platform for the 16-bit, low-power PCM3793A/PCM3794A stereo audio codecs. For a more detailed description of the PCM3793A/94A products, please refer to the product data sheets available from the Texas Instruments web site at http://www.ti.com. Support documents are listed in the sections of this guide entitled Related Documentation from Texas Instruments and Additional Documentation.

How to Use This Manual

Throughout this document, the abbreviation EVM and the term evaluation module are synonymous with the DEM-DAI3793A/3794A EVM. The abbreviation PCM3793A/94A refers to the PCM3793A/94A family of devices. Unless specifically noted, the information presented in this manual applies to both the PCM3793A and the PCM3794A.

Chapter 1 gives an overview of the PCM3793A/94A family of stereo audio coder/decoder devices (codecs). The PCM3793A/94A block diagram and primary features are also discussed.

Chapter 2 provides general information regarding EVM handling and unpacking, absolute operating conditions, and the default switch and jumper configuration. This chapter also discusses the EVM controller software

Chapter 3 is the hardware setup guide for the EVM, providing all of the necessary information needed to configure the EVM switches and jumpers for product evaluation.

Chapter 4 reviews the DEM-DAI3793A/3794A EVM switch and jumper configuration.

Chapter 5 discusses how to set up jumpers on the DEM-DAI3793A/3794A EVM motherboard for performance evaluation using an audio analyzer. It also presents the process for measuring dynamic characteristics and provides example characteristic data.

Chapter 6 includes the EVM electrical schematics, printed circuit board (PCB) layout, and the bill of materials.

Information About Cautions and Warnings

This document contains caution statements.

CAUTION

This is an example of a caution statement. A caution statement describes a situation that could potentially damage your software or equipment.

The information in a caution or a warning is provided for your protection. Please read each caution and warning carefully.

SBAU127 –July 2007

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Contents Users Guide Submit Documentation Feedback Contents 100 List of Figures Side List of Tables Submit Documentation Feedback Information About Cautions and Warnings About This Manual How to Use This ManualAdditional Documentation Related Documentation From Texas InstrumentsIf You Need Assistance FCC Warning TrademarksPin Assignments and Terminal Functions DescriptionIntroduction-PCM3793A/94A Key FeaturesIntroduction-PCM3793A/94A PCM3793A/94A Terminal Functions Pin Assignments and Terminal FunctionsDEM-DAI3793A/3794A EVM Description DEM-DAI3793A/3794A EVM System DiagramSBAU127 -July Getting Started Unpacking the EVM Electrostatic Discharge WarningEVM Configuration Default ConfigurationDaughter Card #2 DEM-TRVC/LPC MotherboardSet-Up Guide Basic Operating Set-Up Software Control and OperationUser Interface Panel Module Function Controls Power On/Off SequenceHP COM/MONO HPC Power Up/DownPCM3793A/94A Resistor 1257dh RES40 Resistor Value Control Power Up/Down Time ms OptionsSetting Default Setting Record Ramp Up Wave Form with DefaultGain Control for ADC Input Options Digital Mute ATR OptionsDigital Out Mute Control Options Playback Function Menu Tab PlaybackSpeaker Gain Control Options Headphone Gain Control OptionsDigital Attenuation ATP Options Auto Level Control Record OptionsALC Automatic Level Control Source Options Signal ProcessingOutput Options Tone Control OptionsClick Apply to Filter 1 or Apply to Filter 3D Effect Options15. Notch Filter Characteristic Model Zero Cross Control Options DAC Oversampling Control OptionsDe-Emphasis Filter Options High-Pass Filter Options18. Analog Path Function Menu Tab Analog PathD2S Select Options Analog Input OptionsAnalog Mixer Options Mic Boost OptionsAudio Interface Setting 2 Options Audio Interface Setting 1 OptionsPG5 Gain and PG6 Gain Options Audio InterfaceHP COM Short Detection Options HP Detection OptionsHP Short Detection, L-Ch HP Detection, R-Ch Speaker Short Detection, L-Ch Speaker Short Detection, R-ChDigital Amplifier 4 LC89052T DIR Digital Audio I/F Receiver Control Window24. Register Setting History Window Register Setting History25. Opening and Modifying a .csv File Modifying a .csv FileRegister Direct Access Read functionWrite function Daughter Card #2 DIR LC89052T and DIT DIT4096 Switches and ConnectorsPower-Supply Terminals for PCM3793A Power-Supply Pins Main Power Supply and RegulatorOverview MotherboardI/F Controller MSP430, TUSB3410 Audio I/OAnalog Input and Output-Daughter Card #1 Daughter Card #1 PCM3793AAnalog Output Configuration Daughter Card #1 Daughter Card #2 DIR LC89052T and DIT DIT4096 Analog Input and Output-Daughter Card #2Audio Clock and Input Data Control Format-Daughter Card #2 Evaluation and Measurements Slave Mode Configuration With SYS-2722 Slave Mode With Audio Precision SYS-2722 Default SettingJumper Configuration for Slave Mode Default Master Mode Configuration With SYS-2722 Master Mode with Audio Precision SYS-2722Jumper Configuration for Master Mode Combined Master and Slave Modes With PSIA-2722 Combined Master and Slave Mode Configuration with SYS-2722Jumper Configuration for Combined Master and Slave Modes Measurements for Dynamic CharacteristicsDigital-to-Analog D/A Performance D/A Line Output ParametersΩ Headphone Output Inserted in Headphone Jack J6 Analog-to-Digital A/D Performance Speaker Output Power PerformanceA/D Line Input Parameters Stereo Speaker Output ParametersLC Low-Pass Filter Speaker Output Filter ConfigurationAmplitude Versus Frequency Performance 4.1 A/D SpectrumResult BPZ Zero Data Input Result -60dB Input 11. D/A Amplitude vs Frequency 4.2 D/A SpectrumPCM3793A/94A Connection Diagram for Practical Applications16. Recommended Ferrite Bead Filter for Speaker Output Filter Consideration for Speaker OutputSchematic, PCB Layout, and Bill of Materials PCM3793A DEM-PCM3793RHB-A Connector Daughter Card #1 SchematicsPCM3793A DEM-PCM3793RHB-A Daughter Card #1 PCM3793A DEM-PCM3793RHB-A Board Layout-Silkscreen Side Printed Circuit Board LayoutPCM3793A DEM-PCM3793RHB-A Board Layout-Component Side PCM3793A DEM-PCM3793RHB-A Board Layout-Inner Layer PCM3793A DEM-PCM3793RHB-A Board Layout-Inner Layer PCM3793A DEM-PCM3793RHB-A Board Layout-Solder Side Bill of Materials Component ListSubmit Documentation Feedback Appendix a Table A-1. .csv Files Reference .csv FilesFigure A-1. Line Output and Headphone Output Related Signal Flow DiagramsFigure A-2. Headphone Output with Sound Effect Figure A-3. Cap-Less Headphone Output Figure A-4. Headphone Output with Line Input AIN2L/AIN2R 0dB AIN3L MUX1 AIN2L AIN1L D2S AIN1R MUX2 AIN3R AIN2R Figure A-7. Stereo Speaker Output Figure A-8. Mono Speaker Output Figure A-9. Speaker Output with Line Input AIN2L/AIN2R Figure A-10. Speaker Output with Mono Mic Input AIN1L, +20dB +20dB Figure A-12. Line Input AIN2L/AIN2R to Headphone Output Figure A-13. Mono Line Input AIN2L to Headphone Output Figure A-14. Mono Mic Input AIN1L, +20dB to Headphone Output +20dB Figure A-16. Mono Mic Input AIN1L, +20dB to Speaker Output Figure A-17. Line Input AIN3L/AIN3R Figure A-18. Mic Input AIN1L/AIN1R, +20dB Figure A-19. Mic Input AIN1L/AIN1R, +20dB with ALC Figure A-20. Mono Mic Input AIN1L, +20dB Figure A-21. Mono Mic Input AIN1L, +20dB with ALC Figure A-22. Mono Diff Mic Input AIN1L/AIN1R, +20dB Figure A-23. Mono Diff Mic Input AIN1L/AIN1R, +20dB with ALC Interfacing to DSPs Figure A-24. Slave Mode OperationTable A-2. Recommended Power-On Sequence for PCM3793A Register Control with DSP InterfacePackage Information FCC Warning Evaluation BOARD/KIT Important NoticeImportant Notice

DEM-DAI3793A specifications

The Texas Instruments DEM-DAI3793A is a versatile digital-to-analog converter (DAC) evaluation module designed for assessing the performance and capabilities of TI's DACs in various applications. This module features the high-performance DAC3793, which is widely recognized for its precision and flexibility, making it an ideal choice for audio, industrial automation, and communication systems.

One of the standout features of the DEM-DAI3793A is its ability to support a 16-bit resolution. This high resolution enables the module to provide fine granularity in signal representation, ensuring that even the most subtle changes in the input signal are accurately reflected in the output. The DAC3793 also boasts a high sampling rate, which is crucial for applications that require rapid signal processing and real-time data conversion.

The module incorporates advanced technologies such as dynamic element matching and integrated circuitry to minimize distortion and noise. These technologies are crucial for achieving high-fidelity audio playback and improving overall system performance. Additionally, the DEM-DAI3793A is designed to minimize power consumption while maintaining exceptional performance levels, making it suitable for battery-operated devices and energy-conscious applications.

Another significant characteristic of the DEM-DAI3793A is its ease of integration with various development environments. The evaluation module supports both hardware and software interfacing, allowing engineers to quickly prototype and test their designs. It comes equipped with a USB interface for seamless connectivity with computers, along with supporting software tools that facilitate the configuration and testing of the DAC's functionalities.

The DEM-DAI3793A is also designed with a robust set of output options, including differential and single-ended outputs. This flexibility allows for compatibility with a wide range of amplification and filtering circuits. Furthermore, the evaluation module is equipped with convenient power supply options, enabling it to operate in various settings without the need for extensive modifications.

In conclusion, the Texas Instruments DEM-DAI3793A is an exceptional evaluation module that showcases the capabilities of the DAC3793. With its high resolution, advanced technologies, ease of integration, and flexible output options, it serves as an indispensable tool for engineers and developers working on high-performance audio and data processing applications.
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