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FEATURES

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 fS 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

? 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

DESCRIPTION

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 an SPI control port, which supports

register write and readback functions. The DSD1791 also

supports the time-division-multiplexed command and

audio (TDMCA) data format.