PCM1781

106dB SNR 立体声 DAC（硬件控制）

The PCM1780/81/82 is a CMOS, monolithic, integrated circuit, which includes stereo digital-to-analog converters and support circuitry in a small 16-lead SSOP package. The data converters use ’s enhanced multilevel delta-sigma architecture to achieve excellent dynamic performance and improved tolerance to clock jitter. The PCM1780/81/82 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. The PCM1780/82 provides a full set of user-programmable functions through a three-wire serial control port, which supports register write functions. The provides a subset of user-programmable functions through four control pins.

The PCM1780 is pin-compatible with the PCM1680 8-channel DAC.

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24-Bit Resolution

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Analog Performance VCC = 5 V:

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Dynamic Range: 106 dB

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SNR: 106 dB, Typical

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THD+N: 0.002%, Typical

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Full-Scale Output: 3.9 Vp-p, Typical

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4×/8× Oversampling Digital Filter:

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Stop-Band Attenuation: -50 dB

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Pass-Band Ripple: ±0.04 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, 1152 fS With Autodetect

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Software Control PCM1780, PCM1782:

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

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Formats: Right-Justified, I2S, and Left-Justified

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Digital Attenuation: Mode Selectable

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0 dB to -63 dB, 0.5 dB/step

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0 dB to -100 dB, 1 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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Open-Drain Output Zero Flag PCM1782

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Hardware Control PCM1781:

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I2S and 16-Bit Word, Right-Justified

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Digital De-Emphasis

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Soft Mute

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Zero Flag for L-, R-Channel Common Output

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Power Supply: 5-V Single Supply

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Small, 16-Lead SSOP Package 150 mil

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Pin-Compatible with PCM1680

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APPLICATIONS

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A/V 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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