PCM1794ADB.B中文资料德州仪器数据手册PDF规格书

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.