Texas Instruments DEM-DAI3793A manual Introduction-PCM3793A/94A, Key Features

Page 12

www.ti.com

Introduction—PCM3793A/94A

1.1Introduction—PCM3793A/94A

The PCM3793A/94A is a low-power stereo codec designed for portable digital audio applications. The device integrates a stereo digital speaker amplifier, headphone amplifier, line amplifier, line input, boost amplifier, microphone bias, programmable gain control, analog mixing, sound effects, and automatic level control (ALC) features. (The PCM3794A has no speaker amplifiers.)

It is available in a 5 × 5 QFN package to reduce the overall device footprint. The PCM3793A/94A accepts Right-Justified, Left-Justified, I2S™, and digital signal processing (DSP) formats, providing an easy interface to audio DSPs, as well as decoders and encoder chips. Sampling rates up to 50kHz are supported. The user-programmable functions are accessible through a two- or three-wire serial control port.

1.1.1 Key Features

Major features of the PCM3793A/94A include:

∙Analog Front End:

–Stereo single-ended input with multiplexer (mux)

–Mono differential input

–Stereo programmable gain amplifier (PGA)

–Microphone amplifier (20dB) and bias

∙Analog Back End:

–Stereo/Mono line output with volume

–Stereo/Mono headphone amplifier with volume and capless mode

–Stereo/Mono digital speaker amplifier (BTL) with volume

∙Analog Performance:

–Dynamic range: 93dB (digital-to-audio converter [DAC])

–Dynamic range: 90dB (analog-to-digital converter [ADC])

–40mW + 40mW headphone output at RL = 16Ω

–700mW + 700mW speaker output at RL = 8Ω

∙Power Supply Voltage

–1.71V to 3.6V for digital I/O section

–1.71V to 3.6V for digital core section

–2.4V to 3.6V for analog section

–2.4V to 3.6V for power amplifier section

∙Low Power Dissipation:

–7mW in playback, 1.8V/2.4V, 48kHz

–13mW in record, 1.8V/2.4V, 48kHz

–3.3μW in power-down

∙Sampling Frequency: 5kHz to 50kHz

∙Automatic Level Control for Recording

∙Operation From a Single Clock Input without PLL

∙System Clock:

–Common-audio clock (256fS/384fS), 12MHz/24MHz, 13MHz/26MHz, 13.5MHz/27MHz, 19.2MHz/38.4MHz, 19.68MHz/39.36MHz

∙Headphone Plug Insert Detection

∙I2C™ or SPI™ Serial Control

12

Description

SBAU127 –July 2007

Page 11 Page 13
Image 12
Page 11 Page 13
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 Basic Operating Set-Up Software Control and OperationUser Interface Panel 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 RecordGain Control for ADC Input Options Digital Mute ATR OptionsDigital Out Mute Control Options Playback Playback Function Menu TabHeadphone Gain Control Options Speaker Gain Control OptionsDigital Attenuation ATP Options Auto Level Control Record OptionsALC Automatic Level Control 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 FileRegister Direct Access Read functionWrite 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 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 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 ModesDigital-to-Analog D/A Performance D/A Line Output ParametersΩ Headphone Output Inserted in Headphone Jack J6 Speaker Output Power Performance Analog-to-Digital A/D PerformanceA/D Line Input Parameters Stereo Speaker Output ParametersSpeaker Output Filter Configuration LC Low-Pass FilterAmplitude Versus Frequency Performance 4.1 A/D SpectrumResult BPZ Zero Data Input Result -60dB Input 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 DSPsTable A-2. Recommended Power-On Sequence for PCM3793A Register Control with DSP InterfacePackage Information 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.
Top Page Image Contents