PCM1748

106dB SNR 立体声 DAC

The is a CMOS, monolithic, integrated circuit which includes stereo digital-to-analog converters DAC and support circuitry in a small SSOP-16 package. The data converters use Texas Instruments" enhanced multilevel delta-sigma architecture that employs fourth-order noise shaping and 8-level amplitude quantization to achieve excellent dynamic performance and improved tolerance to clock jitter. The PCM1748 accepts industry-standard audio data formats with 16- to 24-bit data, providing easy interfacing to audio DSP and decoder chips. Sampling rates up to 100 kHz are supported. A full set of user-programmable functions is accessible through a 3-wire serial-control port that supports register write functions.

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24-Bit Resolution

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Analog Performance VCC = 5 V:

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Dynamic Range:

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106 dB, Typical PCM1748KE

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100 dB, Typical PCM1748E

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SNR:

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106 dB, Typical PCM1748KE

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100 dB, Typical PCM1748E

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THD+N:

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0.002%, Typical PCM1748KE

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0.003%, Typical PCM1748E

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Full-Scale Output: 3.1 Vp-p, Typical

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8× Oversampling Digital Filter:

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Stop-Band Attenuation: -55 dB

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Pass-Band Ripple: ±0.03 dB

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Sampling Frequency: 5 kHz to 100 kHz

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System Clock: 256 fS, 384 fS, 512 fS, 768 fS With Autodetect

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Accepts 16-, 18-, 20-, and 24-Bit Audio Data

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Data Formats: Standard, I2S, and Left-Justified

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User-Programmable Mode Controls:

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Digital Attenuation: 0 dB to -63 dB, 0.5 dB/Step

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Digital De-Emphasis

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Digital Filter Rolloff: Sharp or Slow

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Soft Mute

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Zero Flags for Each Output

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Dual-Supply Operation:

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5-V Analog

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3.3-V Digital

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5-V Tolerant Digital Inputs

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Small SSOP-16 Package

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APPLICA ONS

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AV Receivers

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DVD Movie Players

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DVD Add-On Cards for High-End PCs

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HDTV Receivers

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Car Audio Systems

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Other Applications Requiring 24-Bit Audio

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