PCM1740E/2K屬于集成電路（IC）的ADC/DAC-特殊用途。由美國德州儀器公司制造生產(chǎn)的PCM1740E/2KADC/DAC - 特殊用途該產(chǎn)品族中的產(chǎn)品可用于模擬和數(shù)字表示的信息轉(zhuǎn)換，適用于特定用例，或集成了通用數(shù)據(jù)轉(zhuǎn)換器中不常見的其他功能。例如針對超聲或汽車雷達應(yīng)用集成了低噪聲放大器和可變增益級的器件、注重音頻和視頻的產(chǎn)品、在段碼式顯示器上集成顯示測量值功能的器件、集成輸入輸出電氣隔離的器件等。

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

DESCRIPTION

The PCM1740 is a complete stereo audio digital-toanalog

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.