PCM1782数据手册集成电路（IC）的ADC/DAC-特殊用途规格书PDF

描述 Description

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 TI’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 PCM1781 provides a subset of user-programmable functions through four control pins.

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

特性 Features

• 24-Bit Resolution
• Analog Performance (VCC = 5 V):
• Dynamic Range: 106 dB
• SNR: 106 dB, Typical
• THD+N: 0.002%, Typical
• Full-Scale Output: 3.9 Vp-p, Typical

• 4×/8× Oversampling Digital Filter:
• Stop-Band Attenuation: -50 dB
• Pass-Band Ripple: ±0.04 dB

• Sampling Frequency: 5 kHz to 200 kHz
• System Clock: 128 fS, 192 fS, 256 fS, 384 fS, 512 fS, 768 fS, 1152 fS With Autodetect
• Software Control (PCM1780, PCM1782):
• Accepts 16-, 18-, 20-, and 24-Bit Audio Data
• Formats: Right-Justified, I2S, and Left-Justified
• Digital Attenuation: Mode Selectable
• 0 dB to -63 dB, 0.5 dB/step
• 0 dB to -100 dB, 1 dB/step

• Digital De-Emphasis
• Digital Filter Rolloff: Sharp or Slow
• Soft Mute
• Zero Flags for Each Output
• Open-Drain Output Zero Flag (PCM1782)

• Hardware Control (PCM1781):
• I2S and 16-Bit Word, Right-Justified
• Digital De-Emphasis
• Soft Mute
• Zero Flag for L-, R-Channel Common Output

• Power Supply: 5-V Single Supply
• Small, 16-Lead SSOP Package (150 mil)
• Pin-Compatible with PCM1680
• APPLICATIONS
• A/V Receivers
• DVD Movie Players
• DVD Add-On Cards For High-End PCs
• DVD Audio Players
• HDTV Receivers
• Car Audio Systems
• Other Applications Requiring 24-Bit Audio

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