Texas Instruments | DEM-PCM1792, DEM-DSD1792, DEM-PCM1794, DEM-DSD1794 EVM | User Guides | Texas Instruments DEM-PCM1792, DEM-DSD1792, DEM-PCM1794, DEM-DSD1794 EVM User guides

Texas Instruments DEM-PCM1792, DEM-DSD1792, DEM-PCM1794, DEM-DSD1794 EVM User guides
User’s Guide
July 2003
Audio Converter Products, Digital Audio
SLEU037
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Copyright  2003, Texas Instruments Incorporated
EVM IMPORTANT NOTICE
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EVM WARNINGS AND RESTRICTIONS
It is important to operate this EVM within the input voltage range of "15 V and the output
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Exceeding the specified input range may cause unexpected operation and/or irreversible
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Copyright  2003, Texas Instruments Incorporated
Related Documentation From Texas Instruments
Preface
About This Manual
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
case the user at his own expense will be required to take whatever measures
may be required to correct this interference.
Trademarks
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
Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2
DEM-PCM/DSD1792/1794 Power Supply Connection . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3
S/PDIF Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.4
Audio Output Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.5
Configuration Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.5.1 DAI Receiver Data Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.5.2 Reset of DAI Receiver IC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.5.3 DAI Interface Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.5.4 PCM Audio/DSD Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.5.5 Analog Output Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.5.6 Hardware Control Switches S01−S07 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.5.7 CN-2 I2C Interface/Zero Out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.6
Demo Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.7
DEM-PCM/DSD1792/1794 Parts List (BOM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-1
1-2
1-2
1-2
1-3
1-3
1-3
1-3
1-3
1-4
1-4
1-4
1-5
1-5
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
1−2
1−3
2−1
2−2
2−3
2−4
2−5
2−6
DEM-PCM/DSD1792/1794 Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CN001 Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CN-2 Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DEM-PCM/DSD1792/1794 Silkscreen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DEM-PCM/DSD1792/1794—Top View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DEM-PCM/DSD1792/1794—Bottom View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DEM-PCM/DSD1792/1794 DAC, Analog Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DEM-PCM/DSD1792/1794 Power-Supply Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DEM-PCM/DSD1792/1794 Digital Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-2
1-4
1-5
2-2
2-3
2-4
2-5
2-6
2-7
1−1
1−2
1−3
viii
Digital Audio Receiver Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Digital Audio Source Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Audio Data Format Select . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
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 board accepts 24-bit linear PCM data at sampling rates up to fS = 96
kHz via the S/PDIF interface. For the non-S/PDIF interface, at a sampling rate
of fS = 192 kHz, 24-bit PCM data or 64-fS, 1-bit DSD data can be interfaced
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.
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
I/V
5534
SW
REG Cont
SW
Mode Cont
LPF
5534
Lch LPF
OUT
JP
COAX IN
DAI
CS8414
CN001
OPT IN
DAC
PCM1792
DSD1792
PCM1794
DSD1794
BAL
5534
I/V
5534
Lch OUT
BAL OUT
(MONO)
I/V
5534
BAL
5534
Rch OUT
JP
LPF
5534
I/V
5534
3.3 V REG
REG1117
Rch LPF
OUT
3.3 V REG
REG1117
+5 V
Digital
+5 V
Analog
−15 V
Analog
+15 V
Analog
1.2 DEM-PCM/DSD1792/1794 Power Supply Connection
- Connect the ±15-V analog power supply to TM5 (−VA), TM6 (AGND), and
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
fS = 44.1 kHz).
- 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: Common power supply; connect 5 V to either TM4 (+VCC) or TM2
(+VDD).
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 fS = 96 kHz at the S/PDIF interface. The optical input or coaxial
input is automatically detected by the DAI receiver. For the fS = 192-kHz
1-2
Audio Output Connection
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 I2S format.
Table 1−1. Digital Audio Receiver Configuration
1.5.2
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)
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/I2C register control on the PCM1792. In the case of
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
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
1.5.6
Cutoff frequency of this second-order active post-LPF analog output
circuit is 70 kHz.
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 Table 1−3. Switches S02−S07 must
be set to the N position for the PCM/DSD1792 and DSD1794.
1-4
S01
RESET
H: Normal Operation
S02
FMT1
Audio format select
S03
FMT0
Audio format select
L: RESET
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
Stereo
Sharp
0
0
0
0
I2S
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
Mono, R-channel
Sharp
1
1
0
0
I2S
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
SDA/ZERO
SCL
ADRI
ADRO
GND
CN−2
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.
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
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.)
Top menu
Operation window
1-6
Function window
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
Diode
1SS133
ROHM
Unmounted
Unmounted
Unmounted
JP1−4
4-pin connector
FFC-4BMEP1
Honda Tsushin
JP-P
4-pin connector
FFC-4BMEP1
Honda Tsushin
D001
FIL001
Unmounted
Description
1-7
DEM-PCM/DSD1792/1794 Parts List (BOM)
Ref No.
Value
Part Type
Part Name
Manufacturer
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
DEM-PCM/DSD1792/1794 Printed-Circuit Board
Figure 2−2. DEM-PCM/DSD1792/1794—Top View
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
RA002 47 kΩ × 7
N
L H
S02
N
H
L
L
S01
N
H
S03
L
S04
N
H
L
S05
N
H
N
H
L
L
S06
S07
H
CF1
UA1
10µF 0.047µF
1
P
+3.3V VDDA
3
L
4
D
5
B
6
27
CF2
25
CA5
10µF
24
UA2
7
22
8
21
9
20
10
19
18
12
17
13
16
+
RA3
360Ω
CA15
2700pF
RA5
360Ω
3
CF3
RA1 10kΩ
2200pF
+
CF4
RA6
360Ω
+
RA12
680Ω
CA20
Lch OUT
(2Vrms)
UA7
+
8200pF
RA17
620Ω
RA20
RA18
680Ω
CA26
22pF
CA22
2700pF
330Ω
2700pF
RA22
CA24
620Ω
RA25
100Ω
3
RA19
680Ω
CA23
−
RA23
620Ω
PJ−5
Rch OUT
(2Vrms)
UA8
+
8200pF
CA27
22pF
4
RA21
330Ω
CA17
2700pF
PJ−3
−
2
RA15
330Ω
RA9
360Ω
2700pF
RA16
CA21
620Ω
RA24
100Ω
RA13
680Ω
Rch OUT
(4.5Vrms)
330Ω
1
GND
+
PJ−4
CA19
22pF
RA7
360Ω
CA13
22pF
ADRI
RA11
100Ω
4
SDA/ZERO
RA14
−
820Ω JP−4
−
UA4
RA8 360Ω
UA6
2200pF
RF4
CN−2
CA16 2700pF
3
CA12
22pF
15
2
820Ω JP−3
RF3
−
SCL
CN-M
(Balance)
1
CA3 CA4
10µF 0.047µF
UA1−UA4: NE5534
CA18
22pF
10µF
(CPR)
ADRO
Lch OUT
(4.5Vrms)
+
2
CA11
22pF
UA3
14
PJ−2
10µF
CA7
11
RA10
100Ω
−
820Ω JP−2
23
CA6
RA4 360Ω
UA5
−
DSD1792
DSD1794
RA2
360Ω
2200pF
RF2
26
PCM1792
CA9 CA8
0.047µF 10µF
+
CA10
22pF
(CPL)
PCM1794
S
CA14 2700pF
1
28
2
Q
820Ω JP−1
−
CA1 CA2
O
2200pF
RF1
+VCCA
CA25
2700pF
UA5, UA6: NE5534 or OPA134
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
CPD1
TM4
+VCC
CP1
TM5
−VA
TM6
AGND
CP2
220µF
CP3
220µF
CPD2
TM7
+VA
CP4
220µF
220µF
CP5
CP6
0.1µF
0.047µF
0.047µF
0.047µF
RP1
22kΩ
RP2
22kΩ
RP3
22kΩ
RP4
22kΩ
−VA
+VA
JP−P
RP5
10Ω
UP2
OUT
UP1
OUT
IN
3.3 V
REG
CP9
1µF
CP7
1µF
CP10
1µF
+VCCD
+VDDD
IN
3.3 V
REG
CP8
1µF
+VDDA
+VCCA
+VA
CP13
CP11
7
7
1µF
4
CP14
1µF
CP17
7
1µF
UA2
UA1
4
7
1µF
1µF
CP12
CP15
4
1µF
7
1µF
UA3
CP16
CP19
4
1µF
7
1µF
UA4
CP18
CP21
4
1µF
7
1µF
UA5
CP20
CP23
4
1µF
7
1µF
UA6
CP22
CP25
1µF
UA7
4
CP24
1µF
UA8
4
CP26
1µF
−VA
2-6
DEM-PCM/DSD1792/1794 Schematics
Figure 2−6. DEM-PCM/DSD1792/1794 Digital Section
+VDDD
1
18
CN003
57LE−40360−7700(D3)
19
36
C014
0.1 uF
U006
74VHC244
SW006
DSS104 1
1
VCC
20
[RST−]
2
19
2
[MDO]
3
18
3
[MDI]
4
17
5
16
6
15
7
14
8
13
9
12
4
[MC]
[MS]
RA001
47k × 5
+VCCD
10
RST−
MDO
MDI
MC
MS
11
GND
R003
47k
CN002
FFC−2BMEP1
U002
(L001)
2
3
C005
10uF
/16V
3
4
5
6
U001
TORX173/179
7
C002
0.01uF
1
2 4 5 6
C004
0.1uF
8
C006
0.1uF
C003
10uF
/16V
9
10
11
12
13
14
CN001
RCA pj
28
VERF
C
Cd/F1
Ce/F2
Cc/F0
SDATA
CS8414
1
Cb/E2
Ca/E1
ERF
M1
M0
C0/E0
VD+
VA+
AGND
DGND
RXP
FILT
RXN
MCK
FSYNC
27
1
26
2
13
25
3
12
C007
4
11
23 C008 10uF
22 0.1uF /16V
5
10
21
7
24
R001
75
M3
CS12/FCK
SEL
U
CBL
C013
EXT
17
C010
U003
R002
470
16
0.1 uF
18
4
17
5
16
6
15
7
14
8
13
[DATA] 9
12
[BCK]
[LRCK]
[e-DATA]
(FIL001) (C016)
3 IN OUT 2 0.1uF
VCC
19
[e-LRCK]
10
GND
[e-DATA]
[e-LRCK]
[e-BCK]
[e-SCLK]
VCC
14
2
13
3
12
4
11
5
10
6
9
8
GND
[SCLK]
[BCK]
[LRCK]
SW001
FT1D−2M
SW002
SW003
FT1D−2M FT1D−2M
O
P
Q
S
GND
B
[DATA]
11
GND
U005
74VHC244
1
C012
10uF
/16V
[BCK]
20
3
[e-BCK]
SW004
FP1F
−2M
8
0.1 uF
74VHC14
1
15
2
[SCLK]
25
9
GND
7
[e-SCLK]
R004
470
18
SW005
1
1
6
C009
0.068uF
FT2D−2M
VCC
D001
1SS133
14
19
DAI select
INT(CS8414)
C001
0.01uF
0.1 uF
74HCT32
20
M2
SCK
C011
U004
[SCLK]
[GND]
[BCK]
[BCK(INV)]
[LRCK]
[DATA]
(C015)
100uF/16V
L
D
CN001
24
(CN004)
FFC−48BMEP1
(Not
mounted)
48
Schematic and Printed-Circuit Board
2-7
2-8
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