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

The PCM1792 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 PCM1792 provides balanced current outputs, allowing the user to optimize analog performance externally. The PCM1792 accepts PCM and DSD audio data formats, providing easy interfacing to audio DSP and decoder chips. The PCM1792 also accepts to interface 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 an SPI or I2C serial control port, which supports register write and readback functions. The PCM1792 also supports the time division multiplexed command and audio (TDMCA) data format.

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-, 20-, and 24-Bit Audio Data

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

DSD Format Interface Available

Optional Interface to External Digital Filter or DSP Available

TDMCA or Serial Port (SPI/I²C)

User-Programmable Mode Controls:

• Digital Attenuation: 0 dB to –120 dB, 0.5 dB/Step
• Digital De-Emphasis
• Digital Filter Roll-Off: Sharp or Slow
• Soft Mute
• Zero Flag for Each Output

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 Player
• DVD Players
• HDTV Receivers
• Car Audio Systems
• Digital Multitrack Recorders
• Other Applications Requiring 24-Bit Audio