PCM1748E/2K屬于集成電路（IC）的ADC/DAC-特殊用途。由美國(guó)德州儀器公司制造生產(chǎn)的PCM1748E/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(jiàn)的其他功能。例如針對(duì)超聲或汽車(chē)?yán)走_(dá)應(yīng)用集成了低噪聲放大器和可變?cè)鲆婕?jí)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(cè)量值功能的器件、集成輸入輸出電氣隔離的器件等。

FEATURES

· 24-Bit Resolution

· Analog Performance (VCC = 5 V):

– Dynamic Range:

· 106 dB, Typical (PCM1748KE)

· 100 dB, Typical (PCM1748E)

– SNR:

· 106 dB, Typical (PCM1748KE)

· 100 dB, Typical (PCM1748E)

– THD+N: con·

0.002%, Typical (PCM1748KE)

· 0.003%, Typical (PCM1748E)

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

· 8× Oversampling Digital Filter:

– Stop-Band Attenuation: –55 dB

– Pass-Band Ripple: ±0.03 dB

· Sampling Frequency: 5 kHz to 100 kHz

· System Clock: 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

· HDTV Receivers

· Car Audio Systems

· Other Applications Requiring 24-Bit Audio

DESCRIPTION

The PCM1748 is a CMOS, monolithic, integrated

circuit which includes stereo digital-to-analog con·

verters (DAC) 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 PCM1748 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 100 kHz are supported. A full

set of user-programmable functions is accessible

through a 3-wire serial-control port that supports

register write functions.