Texas Instruments DEM-DAI3793A 3D Effect Options, Click Apply to Filter 1 or Apply to Filter

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3D Effect Options

3D Effect Options

By implementing a 3D effect in this option box, the PCM3793A is enabled to provide 3D sound to the headphone and speaker outputs with low power consumption during either ADC or DAC operation. Check the 3D effect, then select an Effect type and an Efficiency drop-down menu to obtain the desired 3D enhancement.

Effect type means the selection of a band-pass filter (BPF); the BPF filters the sound, and enables a high percentage of heavy 3D enhancements to be applied to the signal.

Effect type and efficiency are controlled through the use of checkboxes.

Notch Filter 1 Coefficient, Notch Filter 2 Coefficient Options

In some applications, incoming noise such as motor control noise, CCD noise and other mechanical noise may not be negligible. The PCM3793A provides a very useful function to reduce such interference with the notch filter function.

When the checkbox of Notch Filter 1 Coefficient or Notch Filter 2 Coefficient is checked, coefficient a1 and a2 of the notch filter can be programmed at each edit box.

Load the values of fc, fb and fS into the Filter Calculator group box.

Click Apply to Filter 1 or Apply to Filter 2. The calculated coefficient will then appear in the a1 and a2 edit box.

Finally, click the Update button for each Notch filter coefficient. To complete the notch filter operation, the Update button must be clicked.

Note that Update step is required each time new or different parameters are loaded to the dialog box.

Follow these steps to update the notch filter coefficient:

Step 1. Click the checkbox of Notch Filter 1 Coefficient or Notch Filter 2 Coefficient. Step 2. Input the parameter values fc, fb and fS.

Step 3. Click Apply to Filter 1 or Apply to Filter 2.

Step 4. Update for each notch filter coefficient.

Each coefficient is calculated using the following equations.

a1 = –(1 + a2)cos(ωo)

a2 = [1 – tan(ωb/2)] / [1 + tan(ωb/2)]

where:

∙fS = sampling frequency

∙fc = center frequency

∙fb = bandwidth

∙ωo = 2πfc/fS represents the angular center frequency

∙ωb = 2πfb/fS is the parameter to adjust bandwidth

Here are several example coefficient calculations using Equation 3-1and Equation 3-2. These measurements are also shown in Figure 3-16.

Given: fS = 16kHz, fc = 0.5kHz, fb = 0.2kHz

a2 = 0.924390492 (converted decimal to hex: 3B29h)

a1 = –1.887413868 (converted decimal to hex: 8735h)

a2: F[215:208] = 3Bh, F[207:200] = 29h

a1: F[115:108] = 87h, F[107:100] = 35h

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Set-Up Guide

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 About This Manual How to Use This Manual Information About Cautions and WarningsRelated Documentation From Texas Instruments Additional DocumentationIf You Need Assistance FCC Warning TrademarksDescription Pin Assignments and Terminal FunctionsKey Features Introduction-PCM3793A/94AIntroduction-PCM3793A/94A Pin Assignments and Terminal Functions PCM3793A/94A Terminal FunctionsDEM-DAI3793A/3794A EVM System Diagram DEM-DAI3793A/3794A EVM DescriptionSBAU127 -July Getting Started Electrostatic Discharge Warning Unpacking the EVMDefault Configuration EVM ConfigurationMotherboard Daughter Card #2 DEM-TRVC/LPCSet-Up Guide User Interface Panel Basic Operating Set-UpSoftware Control and Operation Power On/Off Sequence Module Function ControlsPower Up/Down HP COM/MONO HPCPower Up/Down Time ms Options PCM3793A/94A Resistor 1257dh RES40 Resistor Value ControlRamp Up Wave Form with Default Setting Default Setting RecordDigital Out Mute Control Options Gain Control for ADC Input OptionsDigital Mute ATR Options Playback Playback Function Menu TabHeadphone Gain Control Options Speaker Gain Control OptionsALC Automatic Level Control Digital Attenuation ATP OptionsAuto Level Control Record Options Signal Processing Source OptionsOutput Options Tone Control Options3D Effect Options Click Apply to Filter 1 or Apply to Filter15. Notch Filter Characteristic Model DAC Oversampling Control Options Zero Cross Control OptionsDe-Emphasis Filter Options High-Pass Filter OptionsAnalog Path 18. Analog Path Function Menu TabAnalog Input Options D2S Select OptionsAnalog Mixer Options Mic Boost OptionsAudio Interface Setting 1 Options Audio Interface Setting 2 OptionsPG5 Gain and PG6 Gain Options Audio InterfaceHP Detection Options HP COM Short Detection OptionsHP Short Detection, L-Ch HP Detection, R-Ch Speaker Short Detection, L-Ch Speaker Short Detection, R-Ch4 LC89052T DIR Digital Audio I/F Receiver Control Window Digital AmplifierRegister Setting History 24. Register Setting History WindowModifying a .csv File 25. Opening and Modifying a .csv FileWrite function Register Direct AccessRead function Switches and Connectors Daughter Card #2 DIR LC89052T and DIT DIT4096Main Power Supply and Regulator Power-Supply Terminals for PCM3793A Power-Supply PinsOverview MotherboardAudio I/O I/F Controller MSP430, TUSB3410Daughter Card #1 PCM3793A Analog Input and Output-Daughter Card #1Analog Output Configuration Daughter Card #1 Audio Clock and Input Data Control Format-Daughter Card #2 Daughter Card #2 DIR LC89052T and DIT DIT4096Analog Input and Output-Daughter Card #2 Evaluation and Measurements Slave Mode With Audio Precision SYS-2722 Default Setting Slave Mode Configuration With SYS-2722Jumper Configuration for Slave Mode Default Master Mode with Audio Precision SYS-2722 Master Mode Configuration With SYS-2722Jumper Configuration for Master Mode Combined Master and Slave Mode Configuration with SYS-2722 Combined Master and Slave Modes With PSIA-2722Measurements for Dynamic Characteristics Jumper Configuration for Combined Master and Slave ModesΩ Headphone Output Inserted in Headphone Jack J6 Digital-to-Analog D/A PerformanceD/A Line Output Parameters Speaker Output Power Performance Analog-to-Digital A/D PerformanceA/D Line Input Parameters Stereo Speaker Output ParametersSpeaker Output Filter Configuration LC Low-Pass FilterResult BPZ Zero Data Input Result -60dB Input Amplitude Versus Frequency Performance4.1 A/D Spectrum 4.2 D/A Spectrum 11. D/A Amplitude vs FrequencyConnection Diagram for Practical Applications PCM3793A/94AFilter Consideration for Speaker Output 16. Recommended Ferrite Bead Filter for Speaker OutputSchematic, PCB Layout, and Bill of Materials Schematics PCM3793A DEM-PCM3793RHB-A Connector Daughter Card #1PCM3793A DEM-PCM3793RHB-A Daughter Card #1 Printed Circuit Board Layout PCM3793A DEM-PCM3793RHB-A Board Layout-Silkscreen SidePCM3793A 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 Component List Bill of MaterialsSubmit Documentation Feedback Appendix a Reference .csv Files Table A-1. .csv FilesRelated Signal Flow Diagrams Figure A-1. Line Output and Headphone OutputFigure 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 Figure A-24. Slave Mode Operation Interfacing to DSPsPackage Information Table A-2. Recommended Power-On Sequence for PCM3793ARegister Control with DSP Interface Evaluation BOARD/KIT Important Notice FCC WarningImportant 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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