PCM1791A datasheet(39/58 Pages) TI

Part #	PCM1791A

Description	24-BIT, 192-kHz SAMPLING, ADVANCED SEGMENT, AUDIO STEREO DIGITAL-TO-ANALOG CONVERTER

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Manufacturer	TI [Texas Instruments]

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PCM1791A

SLES071A − MARCH 2003 − REVISED JANUARY 2004

www.ti.com

39

APPLICATION FOR DSD FORMAT (DSD MODE) INTERFACE

SCK

24

23

22

21

20

19

18

17

16

15

5

6

7

8

9

10

11

12

13

14

PCM1791A

RST

VDD

DGND

AGNDF

VCCR

AGNDR

VOUTR−

VOUTR+

VCOM

MSEL

VOUTL−

ZEROL

ZEROR

VCCF

VCCL

VOUTL+

AGNDC

AGNDL

LRCK

1

2

3

4

BCK

DATA

MUTE

28

27

26

25

MS

MC

MDI

MDO

VCCC

Mode

Control

DATA-R

DATA-L

BIT Clock (n

fS)

Analog

Output Stage

(Same as Standard

Application)

Analog

Output Stage

(Same as Standard

Application)

DSD Decoder

Figure 41. Connection Diagram in DSD Mode

Feature

This mode is used for interfacing directly to a DSD decoder, which is found in Super Audio CD

t (SACD) applications.

The DSD mode is available by programming the following bit in the corresponding control register:

D DSD = 1 (register 20)

The DSD mode provides a low-pass filtering function. The filtering is provided using an analog FIR filter structure.

Four FIR responses are available, and are selected by the DMF[1:0] bits of control register 18.

The DSD bit must be set before inputting DSD data; otherwise, the PCM1791A erroneously detects the TDMCA

mode, and commands are not accepted through the serial control interface.

Super Audio CD is a trademark of Sony Kabushiki Kaisha TA Sony Corporation, Japan.

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