DSD1794中文资料

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DSD1794 SLES077A MARCH 2003 REVISED NOVEMBER 2003

24 BIT, 192 kHz SAMPLING, ADVANCED SEGMENT, AUDIO STEREO DIGITAL TO ANALOG CONVERTER FEATURES D Supports Both DSD and PCM Formats D 24-Bit Resolution D Analog 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%

D Dual-Supply Operation: 5-V Analog, 3.3-V Digital

D 5-V Tolerant Digital Inputs D Small 28-Lead SSOP Package, Lead-Free Product

D Differential Current Output: 7.8 mA p-p D 8× Oversampling Digital Filter: Stop-Band Attenuation:–130 dB Pass-Band Ripple:±0.00001 dB

D Sampling Frequency: 10 kHz to 200 kHz D System Clock: 128, 192, 256, 384, 512, or 768 fS With Autodetect

APPLICATIONS D A/V Receivers D SACD Player D DVD Players D HDTV Receivers D Car Audio Systems D Digital Multitrack Recorders D Other Applications Requiring 24-Bit Audio DESCRIPTION The DSD1794 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 DSD1794 provides balanced current outputs, allowing the user to optimize analog performance externally. The DSD1794 accepts the PCM and DSD audio data formats, providing easy interfacing to audio DSP and decoder chips. The DSD1794 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 I2C-compatible serial port.

D Accepts 16-, 20-, and 24-Bit Audio Data D PCM Data Formats: Standard, I2S, and Left-Justified

D Optional Interface to External Digital Filter or DSP Available

D I2C-Compatible Serial Port D User-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

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.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production p

rocessing does not necessarily include testing of all parameters.

Copyright 2003, Texas Instruments Incorporated

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