PCM1740

具有可编程 PLL 和 VCXO 的 94dB SNR 立体声 DAC

The is a complete stereo audio digital-to-analog converter with on-chip PLL and VCXO. The PCM1740 is designed specifically for set-top box applications requiring high-quality audio playback, a precision tuned 27MHz master clock source, and support for multiple audio-sampling frequencies.

The stereo digital-to-analog converter DAC uses multibit, delta-sigma architecture, which includes an 8x interpolation filter, 3rd-order noise shaping, 5-level amplitude quantization, and an analog low-pass filter. The PCM1740 includes a number of user-programmable functions, which are accessed via a standard I2C-Bus interface.

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COMPLETE DELTA-SIGMA STEREO DAC

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VOLTAGE-CONTROLLED CRYSTAL OSCILLATOR:

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27MHz ±150ppm Output with 0V to 3V Input

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PROGRAMMABLE PLL

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256fS or 384fS Audio System Clock Output

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DYNAMIC PERFORMANCE:

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Dynamic Range: 94dB

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SNR: 94dB

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THD+N: 89dB

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SAMPLING FREQUENCIES:

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16kHz, 22.05kHz, 24kHz

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32kHz, 44.1kHz, 48kHz

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64kHz, 88.2kHz, 96kHz

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SERIAL AUDIO INTERFACE:

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Standard or I2S™ Data Formats

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16-, 20-, or 24-Bit Data

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I2C-BUS™ INTERFACE FOR CONTROL REGISTERS:

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Slave Receiver Operation

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7-Bit Addressing

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Standard Transfer Rate up to 100kbps

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PROGRAMMABLE CONTROLS:

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Digital Attenuation 256 steps

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Soft Mute

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Infinite Zero Detect Mute

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De-Emphasis 32kHz, 44.1kHz, 48kHz

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DAC Output Mode

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SINGLE +5V SUPPLY

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SMALL SSOP-24 PACKAGE

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APPLICA ONS

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SET-TOP BOXES

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DIGITAL BROADCAST RECEIVERS

SoundPLUS is a trademark of Texas Instruments.

I2C-Bus, I2C, and I2S are trademarks of NXP B.V.

All other trademarks are the property of their respective owners.