Texas Instruments DEM-DAI3793A manual Power Up/Down Time ms Options

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Power Up/Down Time (ms) Options

Power Up/Down Time (ms) Options

It is possible to select the VCOM ramp up/down time from GND level to a common voltage level or vice-versa by choosing a VCOM capacitor value and time by choosing one of the available checkboxes. A 4.7μF VCOM capacitor is chosen as the default setting (this capacitor is also mounted on the EVM).

The 4.7μF VCOM capacitor is the recommended value for operating the EVM. This configuration is the recommended power-on sequence discussed in the product data sheet.

To select a different VCOM value, choose the appropriate value from the VCOM capacitor drop-down menu. Be sure to change the capacitor on the EVM to the same value (1.0μF, 2.2μF or 10μF).

The combination of PTM[1:0] and RES[4:0] determines the VCOM ramp up/down time, as described in Table 3-2and Table 3-3.

To set the ramp up or down time without directly accessing the registers, users can select a VCOM capacitor value and time in the group box. The ramp up waveform with the default setting is shown in Figure 3-5, and the ramp down waveform in Figure 3-6, as references.

Table 3-2. PCM3793A/94A Resistor 125(7dh)

RES[4:0]: Resistor Value Control

RES [4:0]

VCOM Resistor Value

10000

60 kΩ

11000

24 kΩ

11100

12 kΩ

11110

6 kΩ

Others

Reserved

Table 3-3. PCM3793A/94A Resistor 125(7dh) PMT[1:0]: Power Up/Down Time Control and

Register Direct Access

VCOM Capacitor

 

 

Power-Up Time

Power-Down Time

Register Direct

[μF]

RES[4:0]

PTM[1:0]

[ms]

[ms]

Access

10

11110

00

450

750

0x7D1E

 

11100

11

900

1500

0x7D7C

 

11000

Do not set

—

—

—

 

10000

Do not set

—

—

—

4.7

11110

01

250

400

0x7D3E

 

11100

00

450

750

0x7D1C (default)

 

11000

11

900

1500

0x7D78

 

10000

Do not set

—

—

—

2.2

11110

10

100

300

0x7D5E

 

11100

01

250

400

0x7D3C

 

11000

00

450

750

0x7D18

 

10000

11

900

1500

0x7D70

1.0

11110

Do not set

—

—

—

 

11100

10

100

300

0x7D5C

 

11000

01

250

400

0x7D38

 

10000

00

450

750

0x7D10

SBAU127 –July 2007

Set-Up Guide

25

Submit Documentation Feedback

 

 

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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 Software Control and Operation Basic Operating Set-UpUser 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 DefaultDigital Mute ATR Options Gain Control for ADC Input OptionsDigital Out Mute Control Options Playback Function Menu Tab PlaybackSpeaker Gain Control Options Headphone Gain Control OptionsAuto Level Control Record Options Digital Attenuation ATP 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 FileRead function Register Direct AccessWrite 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 Analog Input and Output-Daughter Card #2 Daughter Card #2 DIR LC89052T and DIT DIT4096Audio 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 CharacteristicsD/A Line Output Parameters Digital-to-Analog D/A PerformanceΩ 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 Configuration4.1 A/D Spectrum Amplitude Versus Frequency PerformanceResult 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 OperationRegister Control with DSP Interface Table A-2. Recommended Power-On Sequence for PCM3793APackage 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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