PCM1794A集成电路（IC）的ADC/DAC-特殊用途规格书PDF中文资料

PCM1794A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PCM1794AADC/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。

1 Features

1• 24-Bit Resolution

• Analog Performance:

– Dynamic Range:

– 132 dB (9 V RMS, Mono)

– 129 dB (4.5 V RMS, Stereo)

– 127 dB (2 V RMS, Stereo)

– THD+N: 0.0004%

• Differential Current Output: 7.8 mA p-p

• 8× Oversampling Digital Filter:

– Stop-Band Attenuation: –130 dB

– Pass-Band Ripple: ±0.00001 dB

• Sampling Frequency: 10 kHz to 200 kHz

• System Clock: 128, 192, 256, 384, 512, or 768 fS

With Autodetect

• Accepts 16-Bit and 24-Bit Audio Data

• PCM Data Formats: Standard, I2S, and Left-

Justified

• Optional Interface Available to External Digital

Filter or DSP

• Digital De-Emphasis

• Digital Filter Rolloff: Sharp or Slow

• Soft Mute

• Zero Flag

• Dual-Supply Operation: 5-V Analog, 3.3-V Digital

• 5-V Tolerant Digital Inputs

• Small 28-Pin SSOP Package

2 Applications

• A/V Receivers

• DVD Players

• Musical Instruments

• Car Audio Systems

• Other Applications Requiring 24-Bit Audio

3 Description

The PCM1794A device is a monolithic, CMOS- integrated circuit that includes stereo digital-to-analog

converters (DACs) and support circuitry in a small 28-

pin SSOP package. The data converters use TI’s

advanced segment DAC architecture to achieve excellent dynamic performance and improved

tolerance to clock jitter. The PCM1794A device

provides balanced current outputs, allowing the user

to optimize analog performance externally. Sampling

rates up to 200 kHz are supported.