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Gain Control for ADC Input Options

Figure 3-8shows the EVM modules that correspond to the record function.

3

PCM3794A￿has￿no￿Speaker￿Output

Module￿of￿Possible￿Power￿Up/Down

MD/

MC/

MS/

SCKI DOUT BCK LRCK DIN SDA

SCL

ADR MODE

 

Power￿On

Power

 

Clock

 

 

 

 

 

2

SPL

 

 

Reset

Up/Down

 

Audio￿Interface

 

 

 

 

 

 

Manager

 

Serial￿Interface￿(SPI/I C)

 

SPOLP

 

 

Manager

 

 

 

 

 

 

 

 

 

 

DGC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SPOLN

 

 

 

 

 

 

ATR

 

 

 

 

 

 

 

 

 

 

 

 

(0dB/+6dB/+12dB/+18dB)

 

 

 

 

 

 

 

 

 

 

+6dB￿to −70dB

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(Mute)

 

 

 

 

 

 

 

 

 

 

PG1

PG5

 

 

 

 

 

 

SPR

 

 

 

 

 

 

ATP

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

AIN3L

MUX1

MUX3

 

 

 

 

 

(0dB￿to −62dB,￿Mute)

 

 

 

SPORP

0dB/

0dB￿to

 

 

 

 

 

 

+6dB￿to −70dB

AIN1L

 

 

 

 

 

 

 

AIN2L

 

 

 

 

 

Analog￿Input￿L-Channel

 

 

 

 

 

SPORN

1

 

 

+20dB

−

21dB

ADL

 

 

DAL

SW1

 

HPL

 

 

 

 

 

 

 

MXL

 

 

 

 

 

PG3

 

 

 

 

 

 

 

 

 

 

 

+30dB￿to

ΔΣ

 

 

ΔΣ

 

SW2

LOUT

 

HPOL/

 

D2S

 

 

 

Digital

Digital

 

 

 

 

−12dB

 

 

ADC

Filter

Filter

DAC

 

SW3

+

+6dB￿to

LOL

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

−70dB

 

 

 

 

 

 

 

 

ADR

 

 

DAR

SW6

MONO +

 

 

 

 

 

+30dB￿to

PG4

 

 

 

 

 

SW5

 

 

 

 

 

 

 

 

ΔΣ

Digital

Digital

ΔΣ

 

+

 

 

 

 

 

−12dB

 

 

ADC

Filter

Filter

DAC

 

 

HPR

 

 

 

 

 

 

 

 

ROUT

 

2

 

 

 

 

 

 

 

 

 

 

 

MXR

 

HPOR/

AIN1R

MUX2

MUX4

PG2

PG6

 

 

 

 

 

SW4

 

 

 

 

 

 

 

−70dB

LOR

AIN3R

 

 

 

Analog￿Input￿R-Channel

 

 

 

 

AIN2R

 

 

 

 

 

 

 

 

 

+6dB￿to

 

 

MCB

 

0dB/

0dB￿to

 

 

 

 

 

MONO

 

HPCOM/

 

Mic￿Bias

 

+20dB

−21dB

 

 

 

 

 

 

MONO

MICB

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

COM

 

 

 

 

 

 

 

 

 

 

 

 

 

HPC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Silent￿Pop￿Noise

 

 

 

HPOL

 

 

 

 

COM

 

 

 

 

 

 

 

 

HDTI

VCOM

VCOM

 

 

 

Controller

 

 

 

HPOR

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VIO

 

VDD DGND VPA

PGND

VCC

AGND

 

 

 

 

Figure 3-8. EVM Modules Corresponding to Record Function

Gain Control for ADC Input Options

Move the L-ch (PG3) and R-ch (PG4) sliders to adjust the gain of the incoming analog signal inputs to the ADC.

∙The L-ch slider manipulates the programmable gain amp (PG3) placed in front of the ADC.

∙The R-ch slider controls the programmable gain amp (PG4) placed in front of the ADC.

Digital Mute (ATR) Options

Click the respective Digital mute (ATR) checkboxes if a mute function is needed for the ADC digital output.

∙The mute checkbox enables a digital soft mute on the ADC for each channel.

∙Mute waiting control enables a mute control.

Digital Out Mute Control Options

Select the Digital out mute control drop-down menu to enable the mute time control.

∙Apply wait or no wait for the ADC mute.

SBAU127 –July 2007

Set-Up Guide

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Texas Instruments DEM-DAI3793A manual Gain Control for ADC Input Options, Digital Mute ATR Options
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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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