FEATURES
Supports Both DSD and PCM Formats
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-, 20-, and 24-Bit Audio Data
PCM Data Formats: Standard, I2S, and
Left-Justified
Optional Interface to External Digital Filter or
DSP Available
I2C-Compatible Serial Port
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
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

DESCRIPTION
The DSD1794A 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 DSD1794A
provides balanced current outputs, allowing the user to
optimize analog performance externally. The DSD1794A
accepts the PCM and DSD audio data formats, providing
easy interfacing to audio DSP and decoder chips. The
DSD1794A also interfaces with 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 I2C-compatible serial
port.