PCM1742集成电路（IC）的ADC/DAC-特殊用途规格书PDF中文资料

PCM1742属于集成电路（IC）的ADC/DAC-特殊用途。由美国德州仪器公司制造生产的PCM1742ADC/DAC - 特殊用途该产品族中的产品可用于模拟和数字表示的信息转换，适用于特定用例，或集成了通用数据转换器中不常见的其他功能。例如针对超声或汽车雷达应用集成了低噪声放大器和可变增益级的器件、注重音频和视频的产品、在段码式显示器上集成显示测量值功能的器件、集成输入输出电气隔离的器件等。

FEATURES

· 24-Bit Resolution

· Analog Performance (VCC = 5 V):

– Dynamic Range:

· 106 dB, Typical (PCM1742KE)

· 100 dB, Typical (PCM1742E)

– SNR:

· 106 dB, Typical (PCM1742KE)

· 100 dB, Typical (PCM1742E)

– THD+N:

· 0.002%, Typical (PCM1742KE) con·

0.003%, Typical (PCM1742E)

– Full-Scale Output: 3.1 V p-p, Typical

· 4x/8x Oversampling Digital Filter:

Stop-Band Attenuation: –55 dB

Pass-Band Ripple: ±0.03 dB

· Sampling Frequency: 5 kHz to 200 kHz

· System Clock: 128 fS, 192 fS, 256 fS, 384 fS,

512 fS, 768 fS With Autodetect

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

· Data Formats: Standard, I2S, and

Left-Justified

· User-Programmable Mode Controls:

Digital Attenuation: 0 dB to –63 dB, 0.5

dB/Step

Digital De-Emphasis

Digital Filter Rolloff: Sharp or Slow

Soft Mute

Zero Flags for Each Output

· Dual-Supply Operation: 5-V Analog, 3.3-V

Digital

· 5-V Tolerant Digital Inputs

· Small SSOP-16 Package

APPLICATIONS

· AV 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

DESCRIPTION

The PCM1742 is a CMOS, monolithic, integrated

circuit which includes stereo digital-to-analog con·

verters (DACs) and support circuitry in a small

SSOP-16 package. The data converters use Texas

Instruments' enhanced multilevel delta-sigma archi-

tecture that employs fourth-order noise shaping and

8-level amplitude quantization to achieve excellent

dynamic performance and improved tolerance to

clock jitter. The PCM1742 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. A full

set of user-programmable functions is accessible

through a 3-wire serial control port that supports

register write functions.