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Software Control and Operation

Check to see that a Ready notation appears in the lower left-hand corner after successful I2C communication is established. Otherwise, you will see an error box showing a communication error (as shown in Figure 3-2).

Figure 3-2. Communication Error Message

If you received this message, confirm the set-up procedures and restart the software. Shut it down and then execute EVM3793A.exe.

There are four primary sections of the user interface panel (see Figure 3-1):

∙Module controller, for functions such as playback, signal processing, audio format, and so forth;

∙Power on/off sequence controller

∙Register setting history controller

∙Register direct access controller

3.2.2Power On/Off Sequence

By default, each module is set without any of the checkboxes toggled in the Power Up/Down menu. All modules are set to a power-down condition.

Click All Power On (the red box, as shown in Figure 3-3) to easily start EVM operation, instead of powering up the module manually.

Figure 3-3. Power On/Off Sequence Function Buttons

Note: If pressing the Power On/Off sequence button has no effect, check to see that the two files power_on.csv and power_off.csv are located in the same folder on the PC as the EVM software (EVM3793A.exe).

3.2.3 Module Function Controls

The DEM-DAI3793A/3794A EVM controller software contains 10 tabs:

∙Power Up/Down: to power up and power down each module

∙Record: executes gain control for ADC input

∙Playback: executes headphone/speaker gain control and digital ATT

∙ALC: tunes the Automatic Level Control function

∙Signal Processing 1: adjusts the tone control and notch filter coefficient

∙Signal Processing 2: controls DAC oversampling, de-emphasis, and high-pass filtering

∙Analog Path: selects analog input, differential input, and analog mixer

∙Audio Interface: selects the audio interface for ADC and DAC

∙Status Detect: controls headphone short detection and speaker thermal protection

∙Digital Amp: tune switching frequency for digital amplifier

This section discusses each of these tab operations and controls.

SBAU127 –July 2007

Set-Up Guide

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Texas Instruments DEM-DAI3793A manual Power On/Off Sequence, Module Function Controls
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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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