DAC 2-CH Segment 24-bit 28-Pin SSOP Tube

The PCM1794 is a monolithic CMOS integrated circuit that includes stereo digital-to-analog converters and support circuitry in a small 28-lead SSOP package. The data converters use TI’s advanced segment DAC architecture to achieve excellent dynamic performance and improved tolerance to clock jitter. The PCM1794 provides balanced current outputs, allowing the user to optimize analog performance externally. Sampling rates up to 200 kHz are supported.

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 f_S With Autodetect

Accepts 16- 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-Lead SSOP Package

APPLICATIONS

• A/V Receivers
• DVD Players
• Musical Instruments
• HDTV Receivers
• Car Audio Systems
• Digital Multitrack Recorders
• Other Applications Requiring 24-Bit Audio