Texas Instruments DSD1794A Bedienungsanleitung

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SLES116A − AUGUST 2004 − REVISED NOVEMBER 2006

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FEATURES

DSupports Both DSD and PCM Formats

D24-Bit Resolution

DAnalog Performance:

− Dynamic Range:

− 132 dB (9 V RMS, Mono)

− 129 dB (4.5 V RMS, Stereo)

− 127 dB (2 V RMS, Stereo)

− THD+N: 0.0004%

DDifferential Current Output: 7.8 mA p-p

D8× Oversampling Digital Filter:

− Stop-Band Attenuation: –130 dB

− Pass-Band Ripple: ±0.00001 dB

DSampling Frequency: 10 kHz to 200 kHz

DSystem Clock: 128, 192, 256, 384, 512, or

768 f

S

With Autodetect

DAccepts 16-, 20-, and 24-Bit Audio Data

DPCM Data Formats: Standard, I

2

S, and

Left-Justified

DOptional Interface to External Digital Filter or

DSP Available

DI

2

C-Compatible Serial Port

DUser-Programmable Mode Controls:

− Digital Attenuation: 0 dB to –120 dB,

0.5 dB/Step

− Digital De-Emphasis

− Digital Filter Rolloff: Sharp or Slow

− Soft Mute

DDual-Supply Operation:

− 5-V Analog, 3.3-V Digital

D5-V Tolerant Digital Inputs

DSmall 28-Lead SSOP Package

APPLICATIONS

DA/V Receivers

DSACD Player

DDVD Players

DHDTV Receivers

DCar Audio Systems

DDigital Multitrack Recorders

DOther Applications Requiring 24-Bit Audio

DESCRIPTION

The DSD1794A is a monolithic CMOS integrated circuit

that includes stereo digital-to-analog converters and

support circuitry in a small 28-lead SSOP package. The

data converters use TI’s advanced-segment DAC

architecture to achieve excellent dynamic performance

and improved tolerance to clock jitter. The DSD1794A

provides balanced current outputs, allowing the user to

optimize analog performance externally. The DSD1794A

accepts the PCM and DSD audio data formats, providing

easy interfacing to audio DSP and decoder chips. The

DSD1794A also interfaces with external digital filter

devices (DF1704, DF1706, PMD200). Sampling rates up

to 200 kHz are supported. A full set of user-programmable

functions is accessible through an I

2

C-compatible serial

port.

This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with appropriate

precautions. Failure to observe proper handling and installation procedures can cause damage.

ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more susceptible to

damage because very small parametric changes could cause the device not to meet its published specifications.

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Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of TexasInstruments

semiconductor products and disclaimers thereto appears at the end of this data sheet.

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Copyright  2006, Texas Instruments Incorporated

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