PCM1742

106dB SNR 立体声 DAC

The is a CMOS, monolithic, integrated circuit which includes stereo digital-to-analog converters DACs 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 PCM1742 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 200 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 PCM1742KE

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100 dB, Typical PCM1742E

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SNR:

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106 dB, Typical PCM1742KE

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100 dB, Typical PCM1742E

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THD+N:

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0.002%, Typical PCM1742KE

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0.003%, Typical PCM1742E

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Full-Scale Output: 3.1 Vp-p, Typical

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4x/8x Oversampling Digital Filter:

Stop-Band Attenuation: -55 dB

Pass-Band Ripple: ±0.03 dB

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Sampling Frequency: 5 kHz to 200 kHz

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System Clock: 128 fS, 192 fS, 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:

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

Digital De-Emphasis

Digital Filter Rolloff: Sharp or Slow

Soft Mute

Zero Flags for Each Output

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Dual-Supply Operation: 5-V Analog, 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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DVD Audio Players

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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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