DAC 2-CH Delta-Sigma 24-bit 28-Pin SSOP Tube

The DSD1791 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 DSD1791 provides balanced voltage outputs, allowing the user to optimize analog performance externally. The DSD1791 accepts PCM and DSD audio data formats, providing easy interfacing to audio DSP and decoder chips. The DSD1791 also accepts interface to external digital filter devices (DF1704, DF1706, PMD200). Sampling rates up to 200 kHz are supported. A full set of user-programmable functions is accessible through a three-wire serial control port. The DSD1791 also supports the time-division-multiplexed command and audio (TDMCA) data format.

Supports both DSD and PCM Formats

24-Bit Resolution

Analog Performance:

• Dynamic Range: 113 dB
• THD+N: 0.001%
• Full-Scale Output: 2.1 V RMS (at Postamp)

Differential Voltage Output: 3.2 Vp-p

8× Oversampling Digital Filter:

• Stop-Band Attenuation: –82 dB
• Pass-Band Ripple: ±0.002 dB

Sampling Frequency: 10 kHz to 200 kHz

System Clock: 128, 192, 256, 384, 512, or 768 f_S With Autodetect

Accepts 16-, 20-, and 24-Bit PCM Audio Data

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

DSD Format Interface Available

Optional Interface to External Digital Filter or DSP Available

TDMCA Interface Available

User-Programmable Mode Controls:

• Digital Attenuation: 0 dB to –120 dB, 0.5 dB/Step
• Digital De-Emphasis
• Digital Filter Rolloff: Sharp or Slow
• Soft Mute/PCM Format
• Zero Detect Mute/PCM Format
• Zero Flag for Each Output/PCM and DSD Formats

Dual Supply Operation:

• 5-V Analog, 3.3-V Digital

5-V Tolerant Digital Inputs

Small 28-Lead SSOP Package

APPLICATIONS

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