PCM1740数据手册集成电路（IC）的ADC/DAC-特殊用途规格书PDF

描述 Description

The PCM1740 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.

特性 Features

• COMPLETE DELTA-SIGMA STEREO DAC
• VOLTAGE-CONTROLLED CRYSTAL OSCILLATOR:
• 27MHz ±150ppm Output with 0V to 3V Input

• PROGRAMMABLE PLL
• 256fS or 384fS Audio System Clock Output

• DYNAMIC PERFORMANCE:
• Dynamic Range: 94dB
• SNR: 94dB
• THD+N: 89dB

• SAMPLING FREQUENCIES:
• 16kHz, 22.05kHz, 24kHz
• 32kHz, 44.1kHz, 48kHz
• 64kHz, 88.2kHz, 96kHz

• SERIAL AUDIO INTERFACE:
• Standard or I2S™ Data Formats
• 16-, 20-, or 24-Bit Data

• I2C-BUS™ INTERFACE FOR CONTROL REGISTERS:
• Slave Receiver Operation
• 7-Bit Addressing
• Standard Transfer Rate (up to 100kbps)

• PROGRAMMABLE CONTROLS:
• Digital Attenuation (256 steps)
• Soft Mute
• Infinite Zero Detect Mute
• De-Emphasis (32kHz, 44.1kHz, 48kHz)
• DAC Output Mode

• SINGLE +5V SUPPLY
• SMALL SSOP-24 PACKAGE
• APPLICATIONS
• SET-TOP BOXES
• 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.