Texas Instruments PCM1792, DSD1792, PCM1794, DSD1794, DEM-PCM1792 User Manual

 
 
 

User’s Guide

July 2003 Audio Converter Products, Digital Audio

SLEU037

IMPORTANT NOTICE

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Copyright  2003, Texas Instruments Incorporated

EVM IMPORTANT NOTICE

Texas Instruments (TI) provides the enclosed product(s) under the following conditions:
This evaluation kit being sold by TI is intended for use for ENGINEERING DEVELOPMENT OR EVALUATION

PURPOSES ONLY and is not considered by TI to be fit for commercial use. As such, the goods being provided
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As a prototype, this product does not fall within the scope of the European Union directive on electromagnetic
compatibility and therefore may not meet the technical requirements of the directive.

Should this evaluation kit not meet the specifications indicated in the EVM User’s Guide, the kit may be returned
within 30 days from the date of delivery for a full refund. THE FOREGOING WARRANTY IS THE EXCLUSIVE
WARRANTY MADE BY SELLER TO BUYER AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED,
IMPLIED, OR S TATUTORY, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR ANY
PARTICULAR PURPOSE.

The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user
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discharge.

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TO THE OTHER FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES.

TI currently deals with a variety of customers for products, and therefore our arrangement with the user is not
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TI assumes no liability for applications assistance, customer product design, software performance, or
infringement of patents or services described herein.

Please read the EVM User’s Guide and, specifically, the EVM Warnings and Restrictions notice in the EVM
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Mailing Address:

Texas Instruments
Post Office Box 655303
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Copyright  2003, Texas Instruments Incorporated

EVM WARNINGS AND RESTRICTIONS

It is important to operate this EVM within the input voltage range of "15 V and the output
voltage range of "15 V.

Exceeding the specified input range may cause unexpected operation and/or irreversible
damage to the EVM. If there are questions concerning the input range, please contact a TI
field representative prior to connecting the input power.

Applying loads outside of the specified output range may result in unintended operation and/or
possible permanent damage to the EVM. Please consult the EVM User’s Guide prior to
connecting any load to the EVM output. If there is uncertainty as to the load specification,
please contact a TI field representative.

During normal operation, some circuit components may have case temperatures greater than
55°C. The EVM is designed to operate properly with certain components above 55°C as long
as the input and output ranges are maintained. These components include but are not limited
to linear regulators, switching transistors, pass transistors, and current sense resistors. These
types of devices can be identified using the EVM schematic located in the EVM User’s Guide.
When placing measurement probes near these devices during operation, please be aware
that these devices may be very warm to the touch.

Mailing Address:

Texas Instruments
Post Office Box 655303
Dallas, Texas 75265

Copyright  2003, Texas Instruments Incorporated

About This Manual

Related Documentation From Texas Instruments

Preface



This document provides a description and instructions for use of an EVM
board for the PCM1792, DSD1792, PCM1794, and DSD1794 stereo audio
DACs.

How to Use This Manual

This document contains the following chapters:

- Chapter 1—Description

- Chapter 2—Schematic and Printed-Circuit Board

Related Documentation From Texas Instruments

- DSD1792 24-Bit, 192-kHz Sampling, Advanced Segment, Audio Stereo

Digital-to-Analog Converter data sheet, SLES067

- PCM1792 24-Bit, 192-kHz Sampling, Advanced Segment, Audio Stereo

Digital-to-Analog Converter data sheet, SLES069

- DSD1794 24-Bit, 192-kHz Sampling, Advanced Segment, Audio Stereo

Digital-to-Analog Converter data sheet, SLES077

- PCM1794 24-Bit, 192-kHz Sampling, Advanced Segment, Audio Stereo

Digital-to-Analog Converter data sheet, SLES080

FCC Warning

This equipment is intended for use in a laboratory test environment only. It
generates, uses, and can radiate radio frequency energy and has not been
tested for compliance with the limits of computing devices pursuant to subpart
J of part 15 of FCC rules, which are designed to provide reasonable protection
against radio frequency interference. Operation of this equipment in other
environments may cause interference with radio communications, in which

v

Trademarks

Trademarks

case the user at his own expense will be required to take whatever measures
may be required to correct this interference.

Microsoft is a registered trademark of Microsoft Corporation.
Windows is a registered trademark of Microsoft Corporation.
Other trademarks are the property of their respective owners.

vi

Contents



1 Description 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.1 Block Diagram 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.2 DEM-PCM/DSD1792/1794 Power Supply Connection 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . .

1.3 S/PDIF Connection 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.4 Audio Output Connection 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.5 Configuration Control 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.5.1 DAI Receiver Data Format 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.5.2 Reset of DAI Receiver IC 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.5.3 DAI Interface Selection 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.5.4 PCM Audio/DSD Interface 1-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.5.5 Analog Output Selection 1-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.5.6 Hardware Control Switches S01−S07 1-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.5.7 CN-2 I2C Interface/Zero Out 1-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.6 Demo Software 1-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.7 DEM-PCM/DSD1792/1794 Parts List (BOM) 1-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2 Schematic and Printed-Circuit Board 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.1 DEM-PCM/DSD1792/1794 Printed-Circuit Board 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.2 DEM-PCM/DSD1792/1794 Schematics 2-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

vii

Contents



1−1 DEM-PCM/DSD1792/1794 Block Diagram 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1−2 CN001 Connection 1-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1−3 CN-2 Connection 1-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2−1 DEM-PCM/DSD1792/1794 Silkscreen 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2−2 DEM-PCM/DSD1792/1794—Top View 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2−3 DEM-PCM/DSD1792/1794—Bottom View 2-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2−4 DEM-PCM/DSD1792/1794 DAC, Analog Section 2-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2−5 DEM-PCM/DSD1792/1794 Power-Supply Section 2-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2−6 DEM-PCM/DSD1792/1794 Digital Section 2-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .



1−1 Digital Audio Receiver Configuration 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1−2 Digital Audio Source Selection 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1−3 Audio Data Format Select 1-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

viii

Chapter 1



The DEM-PCM/DSD1792/1794 is an evaluation module for the PCM1792
(DEM-PCM1792), DSD1792 (DEM-DSD1792), PCM1794 (DEM-PCM1794)
and DSD1794 (DEM-DSD1794) stereo audio DACs. For the PCM devices,
this EVM bo ard accepts 24-bit linear PCM data at sampling rates up to f
kHz via the S/PDIF interface. For the non-S/PDIF interface, at a sampling rate

= 192 kHz, 24-bit PCM data or 64-fS, 1-bit DSD data can be interfaced

of f

S

directly at a connector on the board.
The DEM-PCM/DSD1792/1794 uses an NE5534 op amp for I/V conversion

in the analog output circuit to obtain excellent audio performance. There are
three analog signal output functions onboard as 2-V rms single-ended (RCA),

4.5-V rms single-ended (RCA), and 9-V rms balanced (XLR).
The DEM-PCM/DSD1792/1794 is operated by a ±15-V analog power supply,

5-V DAC power supply and 5-V digital power supply. A single 5-V power supply
can be used to power the DAC and digital circuitry by setting a jumper
connection, but to obtain the specified audio performance, use of separate
power supplies is recommend.

= 96

S

Typical audio performance is as follows:

THD+N = 0.0004%
Dynamic range (EIAJ) = 128 dB (4 V rms)
Dynamic range (EIAJ) = 125 dB (2 V rms)

Topic Page

1.1 Block Diagram 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.2 DEM-PCM/DSD1792/1794 Power Supply Connection 1-2. . . . . . . . . . . . .

1.3 S/PDIF Connection 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.4 Audio Output Connection 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.5 Configuration Control 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.6 Demo Software 1-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.7 DEM-PCM/DSD1792/1794 Parts List (BOM) 1-7. . . . . . . . . . . . . . . . . . . . . .

Description

1-1

Block Diagram

1.1 Block Diagram

Figure 1−1.DEM-PCM/DSD1792/1794 Block Diagram

+5 V

Analog

I/V

5534

I/V

5534

I/V

5534

I/V

5534

−15 V

Analog

JP

JP

+15 V

Analog

COAX IN

OPT IN

SW

Mode Cont

DAI

CS8414

3.3 V REG
REG1117

+5 V

Digital

REG Cont

CN001

SW

DAC
PCM1792
DSD1792
PCM1794
DSD1794

3.3 V REG
REG1117

1.2 DEM-PCM/DSD1792/1794 Power Supply Connection

LPF

5534

BAL

5534

BAL

5534

LPF

5534

Lch LPF
OUT

Lch OUT

BAL OUT
(MONO)

Rch OUT

Rch LPF
OUT

- Connect the ±15-V analog power supply to TM5 (−VA), TM6 (AGND), an d

TM7 (+VA). Power supply current is typically ±40 mA, maximum ±70 mA.

- Connect the 5-V DAC power supply to TM4 (+VCC) and TM3 (AGND). A

3.3-V regulator IC is connected to provide a 3.3-V power supply for the
DAC device. Power supply current is typically 50 mA, maximum 60 mA (at
f

- Connect the 5-V digital power supply at TM2 (+VDD) and TM1 (DGND).

A 3.3-V regulator IC is connected to provide a 3.3-V logic supply to the
digital section. Power supply current is typically 70 mA, max +120 mA.

- Jumper JP-P is for the selection of separate 5-V +VCC and +VDD power

supplies, or a common 5-V power supply.

J 1−2: Separate power supplies
J 3−4: C ommon p ower s upply; c onnect 5 V t o e ither T M4 ( +VCC) o r T M2

1.3 S/PDIF Connection

Connect the S/PDIF interface at either PJ-1 (RCA phono jack, coaxial cable)
or U001 (optical cable). The DEM-PCM/DSD1792/1794 accepts sampling
rates up to f
input is automatically detected by the DAI receiver. For the f

= 44.1 kHz).

S

(+VDD).

= 96 kHz at the S/PDIF interface. The optical input or coaxial

S

= 192-kHz

S

1-2

sampling audio data interface, the interface signal can be connected at the
right side of the CN001 connector or at ext-xxxx of CN004 (not mounted).

1.4 Audio Output Connection

The audio output signal can be obtained on either the RCA stereo pin jacks
or the XLR connector. The audio output signal level and format are selected
by jumper, using the jumper connections listed in Section 1.5.5.

- Connect RCA cables at either PJ-3 and PJ-5 (2 V rms, L ch/R ch) or PJ-2

and PJ-4 (4.5 V rms L ch/R ch) for stereo mode operation.

- CN-M (XLR connector) is a 9-V rms mono output for the mono operation

mode of the PCM/DSD1792.

1.5 Configuration Control

1.5.1 DAI Receiver Data Format

Switches SW001 through SW003 are used to set the DAI receiver output audio
interface format as shown in Table 1−1. The initial (default) format of the
PCM1792/DSD1792 is I

2

S format.

Audio Output Connection

Table 1−1.Digital Audio Receiver Configuration

SW001 SW002 SW003 Receiver Output Data Format

L L L 16- to 24-bit left-justified
L H L 16- to 24-bit l2S
H L H 16-bit right-justified (or standard)
L H H 18-bit right-justified (or standard)

1.5.2 Reset of DAI Receiver IC

Switch SW004 is a normally-open, momentary-contact pushbutton switch
used to reset the digital audio receiver when necessary.

1.5.3 DAI Interface Selection

The demonstration board also supports direct interfacing to audio decoders
and signal processors via connector CN004 (unpopulated). SCLK, BCK,
LRCK, and DATA are available and buffered by U005. Switch SW005 is used
to select between the digital audio receiver and connector CN004 as the
source of the audio interface. Table 1−2 shows the available switch settings.

Table 1−2.Digital Audio Source Selection

SW005 Setting Source Selection

INT Digital audio receiver (U002)
EXT Connector CN004 via buffer U005

CN004 is not supplied. However, the board has the necessary wiring and holes
so that the user can mount the connector if desired.

Description

1-3

Configuration Control

1.5.4 PCM Audio/DSD Interface

Connector CN001 allows selection of the audio data interface connection by
jumper settings. In the case of a linear PCM audio data interface between the
DAI receiver and the PCM/DSD1792/1794 DAC, system clock, BCK, LRCK,
DATA and GND should be jumper connected. The MSEL jumper connection
is for the selection of SPI/I
a DSD audio data interface between the DSD decoder LSI and the DSD1792
DAC, DSDL, DSDR, DBCK and system clock should be connected at right side
pins of CN001. The MSEL jumper must be connected (to GND) for SPI mode
operation of the PCM1792.

Figure 1−2.CN001 Connection

2

C register control on the PCM1792. In the case of

Lch ZERO Out/PCM. Lch DATA In/DSD
Rch ZERO Out/PCM. Rch DATA In/DSD
MSEL/PCM. DBCK In/DSD
System Clock In
GND
BCK In
BCK In for Left-Justified
LRCK In
DATA In

CN001

1.5.5 Analog Output Selection

Jumper connections JP-1 through JP-4 are for selection of the analog output
function. Jumper connections JP-1 through JP-4 must all have either pins 1−2
connected or pins 3−4 connected.

- 1−2: 4.5-V rms single-ended output (PJ-2, PJ-4) and 9-V rms balanced

output (CN-M)

J Cutoff frequency of this analog output circuit is 200 kHz

- 3−4: 2-V rms single-ended output (PJ-1, PJ-3)
J Cutoff frequency of this second-order active post-LPF analog output

circuit is 70 kHz.

1.5.6 Hardware Control Switches S01−S07

Switches S01−S07 are hardware controls for the PCM1794. S01 is a reset
control for both PCM/DSD1792 and PCM/DSD1794. S02, S03, S05 and S06
are for audio format selection as shown in T able 1−3. Switches S02−S07 must
be set to the N position for the PCM/DSD1792 and DSD1794.

S01 RESET H: Normal Operation L: RESET
S02 FMT1 Audio format select
S03 FMT0 Audio format select

1-4

Demo Software

S04 MUTE H: MUTE ON L: MUTE OFF
S05 DEM H: De-emphasis ON L: De-emphasis OFF
S06 CHSL Audio format select
S07 MONO Audio format select

Table 1−3.Audio Data Format Select

MONO CHSL FMT1 FMT0 FORMAT STEREO/MONO DF ROLLOFF

0 0 0 0 I2S Stereo Sharp
0 0 0 1 LJF Stereo Sharp
0 0 1 0 Standard, 16-bit Stereo Sharp
0 0 1 1 Standard, 24-bit Stereo Sharp
0 1 0 0 I2S Stereo Slow
0 1 0 1 LJF Stereo Slow
0 1 1 0 Standard, 16-bit Stereo Slow
0 1 1 1 DF bypass Mono −
1 0 0 0 I2S Mono, L-channel Sharp
1 0 0 1 LJF Mono, L-channel Sharp
1 0 1 0 Standard, 16-bit Mono, L-channel Sharp
1 0 1 1 Standard, 24-bit Mono, L-channel Sharp
1 1 0 0 I2S Mono, R-channel Sharp
1 1 0 1 LJF Mono, R-channel Sharp
1 1 1 0 Standard, 16-bit Mono, R-channel Sharp
1 1 1 1 DF bypass Mono, R-channel Sharp

1.5.7 CN-2 I2C Interface/Zero Out

CN-2 is the I2C control interface connector and zero output.

Figure 1−3.CN-2 Connection

1.6 Demo Software

Demonstration software is provided to control the PCM1792/DSD1792
internal register using a PC under Microsoft Windows. The software uses
a printer cable to connect between the PC and connector CN003 on the
DEM-PCM/DSD1792.

SDA/ZERO
SCL
ADRI
ADRO
GND

CN−2

Description

1-5

Demo Software

Demonstration software includes a total five files in the DEM1792 directory.
These files are:

- DEM1792.exe

- DEM1792.ini

- Vbrjp200.dll

- Ver.dll

- Inpout.dll

Top menu

Copy these files to a convenient directory (folder) such as C:

DEM1792.

Then, change the printer-port address in DEM1792.ini to &H378, &H278, or
&H3BCO (Most PCs use &H378 as the default printer port address.)

Function window

Operation window

1-6

Attenuation window

DEM-PCM/DSD1792/1794 Parts List (BOM)

1.7 DEM-PCM/DSD1792/1794 Parts List (BOM)

Ref No. Value Part Type Part Name Manufacturer

C001 0.01 µF Film capacitor AMFF0050J103 Nissei
C002 0.01 µF Film capacitor AMFF0050J103 Nissei
C003 10 µF/16 V AL electrolytic capacitor ROA-16V100M ELNA
C004, 006 0.1 µF Film capacitor AMFF0050J104 Nissei
C005 10 µF/16 V AL electrolytic capacitor ROA-16V100M Nissei
C007 10 µF/16 V AL electrolytic capacitor ROA-16V100M ELNA
C008 0.1 µF Film capacitor AMFF0050J104 Nissei
C009 0.068 µF Film capacitor AMFF0050J683 Nissei
C010 0.1 µF Ceramic capacitor D55Y5V1H104A NEC
C011 0.1 µF Ceramic capacitor D55Y5V1H104A NEC
C012 10 µF/16 V AL electrolytic capacitor
C013 0.1 µF Ceramic capacitor D55Y5V1H104A NEC
C014 0.1 µF Ceramic capacitor D55Y5V1H104A NEC
C015 100 µF/16 V AL electrolytic capacitor ROA-16V101M ELNA
C016 0.1 µF Film capacitor AMFF0050J104 Nissei
CA1, 3 10 µF/16 V AL electrolytic capacitor Cerafine ELNA
CA5−8 10 µF/16 V AL electrolytic capacitor Cerafine ELNA
CA2, 4, 9 0.047 µF Film capacitor APFF Nissei
CA10−13 22 pF Ceramic capacitor
CA18, 19 22 pF Ceramic capacitor
CA26, 27 22 pF Ceramic capacitor
CA14−17 2700 pF Film capacitor APSF0100J272 Nissei
CA20, 23 8200 pF Film capacitor APSF0100J822 Nissei
CA21, 22 1800 pF Film capacitor APSF0100J182 Nissei
CA24, 25 1800 pF Film capacitor APSF0100J182 Nissei
CF1−4 2200 pF Film capacitor APSF0100J222 Nissei
CN001 18-pin connector FFC-18BMEP1 Honda Tsushin
CN002 2-pin connector FFC-2BMEP1 Honda Tsushin
CN003 L connector 57LE40360-7700(D3) Daiichi Denshi
CN-M XLR connector NC3MAH-0 Meutrick
CP1, 2, 3 220 µF/25 V AL electrolytic capacitor Cerafine ELNA
CP4, 5, 6 0.047 µF Film capacitor APFF Nissei
CP7, 8 1 µF/16 V AL electrolytic capacitor Cerafine ELNA
CP9, 10 1 µF/16 V AL electrolytic capacitor Cerafine ELNA
CP11−26 1 µF/16 V AL electrolytic capacitor Cerafine ELNA
CPD1 220 µF/25 V AL electrolytic capacitor Cerafine ELNA
CPD2 0.1 µF Ceramic capacitor
D001 Diode 1SS133 ROHM
FIL001 Unmounted Unmounted Unmounted Unmounted
JP1−4 4-pin connector FFC-4BMEP1 Honda Tsushin
JP-P 4-pin connector FFC-4BMEP1 Honda Tsushin

Description

1-7

DEM-PCM/DSD1792/1794 Parts List (BOM)

Ref No. ManufacturerPart NamePart TypeValue

L001 Unmounted Unmounted Unmounted Unmounted
PJ-1 RCA connector (yellow) LPR6520-0804 SMK
PJ-2, 3 RCA pin (white) Wake
PJ-4, 5 RCA pin (red) Wake
R001 75 Ω 1/8-W resistor
R002 470 Ω 1/8-W resistor
R003 47 kΩ 1/8-W resistor
R004 470 Ω 1/8-W resistor
RA001 47 kΩ ×5 Resistor array
RA1 10 Ω 1/8-W resistor
RA2−9 360 Ω 1/8-W resistor
RA10, 11 100 Ω 1/8-W resistor
RA12, 13 1.3 Ω 1/8-W resistor
RA18, 19 1.3 Ω 1/8-W resistor
RA14−17 620 Ω 1/8-W resistor
RA20−23 620 Ω 1/8-W resistor
RA24, 25 100 Ω 1/8-W resistor
RF1−4 820 Ω 1/8-W resistor
RP1, 2, 3, 4 22 kΩ 1/8-W resistor
RP5 10 Ω 1/8-W resistor
SW001 DIP SW 1-pole double FT1D-2M Fujisoku
SW002 DIP SW 1-pole double FT1D-2M Fujisoku
SW003 DIP SW 1-pole double FT1D-2M Fujisoku
SW004 Push SW FP1F-2M Fujisoku
SW005 DIP SW 2-pole double FT2D-2M Fujisoku
SW006 DIP SW 4-element DSS104 Fujisoku
TM1, 3, 6 Banana jack (black)
TM2, 4 Banana jack (red)
TM5 Banana jack (blue)
TM7 Banana jack (orange)
U001 TOSLINK TORX173/179 Toshiba
U002 Digital audio I/F receiver IC CS8414-CS Crystal
U003 Logic IC TC74HC14AF Toshiba, TI
U004 Logic IC TC74HC32AF Toshiba, TI
U005, U006 Logic IC TC74VHC244F Toshiba, TI
UA1−8 8-pin DIP IC socket
UP1, 2 Regulator IC REG1117-3.3 Burr-Brown/TI

Shorting plug × 5 DIC130 Honda Tsushin
Spacer (H:20-25 mm) × 4

1-8

Chapter 2

   

This chapter presents the DEM-PCM/DSD1792/1794 printed-circuit board
and schematics.

Topic Page

2.1 DEM-PCM/DSD1792/1794 Printed-Circuit Board 2-2. . . . . . . . . . . . . . . . .

2.2 DEM-PCM/DSD1792/1794 Schematics 2-5. . . . . . . . . . . . . . . . . . . . . . . . . . .

Schematic and Printed-Circuit Board

2-1

DEM-PCM/DSD1792/1794 Printed-Circuit Board

2.1 DEM-PCM/DSD1792/1794 Printed-Circuit Board

Figure 2−1.DEM-PCM/DSD1792/1794 Silkscreen

2-2

Figure 2−2.DEM-PCM/DSD1792/1794—Top View

DEM-PCM/DSD1792/1794 Printed-Circuit Board

Schematic and Printed-Circuit Board

2-3

DEM-PCM/DSD1792/1794 Printed-Circuit Board

Figure 2−3.DEM-PCM/DSD1792/1794—Bottom View

2-4

DEM-PCM/DSD1792/1794 Schematics

2.2 DEM-PCM/DSD1792/1794 Schematics

Figure 2−4.DEM-PCM/DSD1792/1794 DAC, Analog Section

+3.3V VDDA

NNNNN

LHLH

S01 S02 S03 S04 S05 S06

+3.3V VDDA

RA002 47 kΩ × 7

N

H

L

LHLHLHL

O
P
Q
L
D
B
S

CA9

0.047µF

CA8

10µF

S07

CN−2

1
2

3
4
5
6
7
8
9
10
11
12
13
14

H

PCM1792
DSD1792
PCM1794
DSD1794

SDA/ZERO
SCL

ADRI

ADRO

GND

CF1

2200pF

JP−1

820Ω

RF1

+VCCA

CA21

UA7

UA1

UA2

UA3

UA4

330Ω

2700pF

−
+

CA22

2700pF

CF2

RF2

CF3

RF3

CF4

RF4

−
+

−
+

−
+

−
+

CA26
22pF

CA10

22pF

2200pF

CA11
22pF

2200pF

CA12
22pF

2200pF

CA13
22pF

RA24
100Ω

820Ω

820Ω

820Ω

JP−2

JP−3

JP−4

PJ−3

CA1 CA2
10µF

CA6 10µF
CA7 10µF

RA1

CA3 CA4

10µF

0.047µF

RA12
680Ω

1

RA13
680Ω

2

0.047µF

10kΩ

(CPR)

RA15
330Ω

(CPL)

CA5

10µF

RA14

RA16
620Ω

CA20

8200pF

RA17
620Ω

28
27
26
25
24
23
22
21
20
19
18
17
16
15

RA2

360Ω

RA3

360Ω

RA6

360Ω

RA7

360Ω

Lch OUT
(2Vrms)

CA14

1

RA4

UA5

2

CA16 2700pF

3

RA8

UA6

4

RA5
360Ω

RA9
360Ω

2700pF

360Ω

−
+

360Ω

−
+

CA18

22pF

CA19

22pF

RA10
100Ω

CA15
2700pF

1

RA11
100Ω

CA17
2700pF

PJ−2

Lch OUT
(4.5Vrms)

3

CN-M
(Balance)

2

PJ−4

Rch OUT
(4.5Vrms)

UA1−UA4: NE5534
UA5, UA6: NE5534 or OPA134

RA20

330Ω

2700pF

RA22

RA18
680Ω

3

RA19
680Ω

4

RA21
330Ω

CA24

620Ω

CA23

8200pF

RA23
620Ω

UA8

−
+

CA25

2700pF

CA27
22pF

RA25
100Ω

PJ−5

Rch OUT
(2Vrms)

Schematic and Printed-Circuit Board

2-5

DEM-PCM/DSD1792/1794 Schematics

Figure 2−5.DEM-PCM/DSD1792/1794 Power-Supply Section

TM1

DGND

TM2

+VDD

TM3

AGND

TM4

+VCC

TM5

−VA

TM6

AGND

TM7

+VA

+VDDD

RP4

22kΩ

CP3

CP6

+VA−VA

+VA

UA8

+VCCA

CP2

CP5

7

4

CP23

1µF

CP24

220µF

0.047µF

UA7

RP3

22kΩ

7

4

220µF

0.047µF

CP25

1µF

CP26

UP1

3.3 V
REG

CP19

1µF

CP20

UA5

CP1

CP4

220µF

0.047µF

RP2

22kΩ

IN

7

4

CP8
1µF

CP21

1µF

CP22

UA6

CPD1

JP−P

CP17

1µF

CP18

UA4

OUT

220µF

0.1µF

RP1

22kΩ

CP7
1µF

7

4

CPD2

RP5

10Ω

UP2

OUT

CP11

7

1µF

UA1

CP12

4

CP9
1µF

3.3 V
REG

7

4

CP13

1µF

CP14

UA2

IN

CP10
1µF

7

4

+VCCD

CP15

1µF

UA3

CP16

+VDDA

7

4

2-6

1µF

1µF

1µF

1µF

1µF

1µF

1µF

1µF

−VA

Figure 2−6.DEM-PCM/DSD1792/1794 Digital Section

19

SW006
DSS104

1
2
3
4
5
6
7
8

9
10
11
12
13
14

SW005
FT2D−2M

(C015)
100uF/16V

1

1
2
3
4

U002

C
Cd/F1
Cc/F0
Cb/E2
Ca/E1
C0/E0
VD+
DGND
RXP
RXN
FSYNC
SCK
CS12/FCK
U

[SCLK]

[BCK]

[LRCK]

[DATA]

VERF
Ce/F2

SDATA

ERF

CS8414

VA+

AGND

FILT

MCK

SEL

CBL

C013 0.1 uF

1
2
3
4
5
6
7
8
9

10

GND

RA001
47k × 5

M1
M0

M2
M3

V

CC

74VHC244

CN002
FFC−2BMEP1

28
27
26
25
24

C008

23

0.1uF

22
21
20
19
18
17
16
15

20
19
18
17
16
15
14
13
12
11

U005

C009

0.068uF

+VCCD

(L001)

2

456

CN001
RCA pj

1

25

U001
TORX173/179

3

1

R001
75

C004

0.1uF

C002

0.01uF

C003
10uF
/16V

C001

0.01uF

[e-SCLK]

[e-BCK]

[e-LRCK]

[e-DATA]

[e-SCLK]

[e-BCK]

CN003
57LE−40360−7700(D3)

C005

10uF
/16V

C006

0.1uF

DAI select

INT(CS8414)

EXT

(C016)

3

[e-DATA]

[e-LRCK]

(FIL001)

GND

1

0.1uF

OUTIN

2

C007
10uF
/16V

R002
470

[SCLK]

[BCK]

[LRCK]

[DATA]

24

(CN004)
FFC−48BMEP1

(Not mounted)

48

DEM-PCM/DSD1792/1794 Schematics

+VDDD

18

36

C014

GND

74HCT32

V

74VHC14

V

SW002
FT1D−2M

CN001

CC

CC

0.1 uF

V

CC

14
13
12
11
10
9
8

20
19
18
17
16
15
14
13
12
11

14
13
12
11
10
9
8

SW003
FT1D−2M

R003
47k

O
P
Q
S
GND
B

L
D

RST−
MDO
MDI
MC

MS

D001
1SS133

R004
470

SW004
FP1F

−2M

C012
10uF
/16V

U006

74VHC244

[RST−]

[MDO]

[MDI]

[MC]

[MS

[BCK]

SW001
FT1D−2M

1
2
3
4
5
6
7

]

8
9

10

C011 0.1 uF
U004

1
2
3
4
5
6
7

GND

C010 0.1 uF

U003

1
2
3
4
5
6
7

GND

[SCLK]

[GND]
[BCK]

[BCK(INV)]

[LRCK]

[DATA]

Schematic and Printed-Circuit Board

2-7

2-8