Texas Instruments DEM-PCM1793 User manual

 
 
 
November 2003 Audio Converter Products, Digital Audio
User’s Guide
SLEU038

IMPORTANT NOTICE
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Mailing Address: Texas Instruments
Post Office Box 655303, Dallas, Texas 75265
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
may not be complete in terms of required design-, marketing-, and/or manufacturing-related protective
considerations, including product safety measures typically found in the end product incorporating the goods.
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 STATUTORY, 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
indemnifies TI from all claims arising from the handling or use of the goods. Please be aware that the products
received may not be regulatory compliant or agency certified (FCC, UL, CE, etc.). Due to the open construction
of the product, it is the user’s responsibility to take any and all appropriate precautions with regard to electrostatic
discharge.
EXCEPT TO THE EXTENT OF THE INDEMNITY SET FORTH ABOVE, NEITHER PARTY SHALL BE LIABLE
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
exclusive.
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
User’s Guide prior to handling the product. This notice contains important safety information about temperatures
and voltages. For further safety concerns, please contact the TI application engineer.
Persons handling the product must have electronics training and observe good laboratory practice standards.
No license is granted under any patent right or other intellectual property right of TI covering or relating to any
machine, process, or combination in which such TI products or services might be or are used.
Mailing Address:
Texas Instruments
Post Office Box 655303
Dallas, Texas 75265
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

v
Preface

About This Manual
This user’s guide provides information needed by a technician for the
operation and maintenance of the DEM-PCM/DSD1791/1793 evaluation
module (EVM). This includes descriptions of connections, controls, audio
interface selection, control via software and I2C, parts listings, board layouts,
and schematic diagrams.
How to Use This Manual
This document contains the following chapters:
Chapter 1—Description
Chapter 2—Schematics and Printed-Circuit Boards
Related Documentation From Texas Instruments
DSD1791 24-Bit, 192-kHz Sampling, Advanced Segment, Audio Stereo
Digital-to-Analog Converter data sheet, SLES072
DSD1793 24-Bit, 192-kHz Sampling, Advanced Segment, Audio Stereo
Digital-to-Analog Converter data sheet, SLES075
PCM1791A 24-Bit, 192-kHz Sampling, Advanced Segment, Audio Stereo
Digital-to-Analog Converter data sheet, SLES071
PCM1793 24-Bit, 192-kHz Sampling, Advanced Segment, Audio Stereo
Digital-to-Analog Converter data sheet, SLES076
FCC Warning
This equipment is intended for use in a laboratory test environment only. It gen-
erates, 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 en-
vironments may cause interference with radio communications, in which case
the user at his own expense will be required to take whatever measures may
be required to correct this interference.

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

Contents
vii
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1 Description 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.1 Block Diagram 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2 Connections 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3 Operating Controls 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3.1 SW001, SW002, SW003 DAI PCM Interface Format 1-3. . . . . . . . . . . . . . . . . . . . .
1.3.2 SW004 Reset for DAI 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3.3 SW005 DAI/External Interface Selection 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3.4 JP001 BCK Selection 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3.5 SW006 Operation Control for DAC 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3.6 SW001 on Daughter Card − Operation Control for PCM1793 1-3. . . . . . . . . . . . . .
1.4 Audio Data Interface 1-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.4.1 PCM Audio Interface 1-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.4.2 DSD Audio Interface for PCM1791/1793 1-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.4.3 DSD Audio Interface for DSD1791/1793 1-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.5 Demonstration Software Control 1-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.6 I2C Control 1-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.7 Demonstration Software 1-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.8 DEM/DSD1791/1793 Parts List (BOM) 1-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.9 DEM-AS/VDAC Board Section Parts List (BOM) 1-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2 Schematics and Printed-Circuit Boards 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.1 DEM-DAI/ASDAC Printed-Circuit Board 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2 DEM-AS/VDAC Printed-Circuit Board 2-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.3 DEM-DAI/ASDAC Schematic 2-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.4 DEM-AS/VDAC Schematic 2-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Contents
viii

1−1. DEM−PCM/DSD1791/1793 Block Diagram 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2−1. DEM-DAI/ASDAC Silkscreen 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2−2. DEM-DAI/ASDAC—Top View 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2−3. DEM-DAI/ASDAC—Bottom View 2-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2−4. DEM-AS/VDAC Silkscreen 2-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2−5. DEM-AS/VDAC—Top View 2-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2−6. DEM-AS/VDAC—Bottom View 2-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2−7. DEM-DAI/ASDAC Analog Section (Sockets for Daughter Board, Low-Pass Filter) 2-7. . . . .
2−8. DEM-DAI/ASDAC Regulator and Connector 2-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2−9. DEM-DAI/ASDAC—PCM/DSD1791, PCM1793 Digital Section (Digital Audio Interface) 2-8
2−10. DEM-DAI/ASDAC—PCM1793 Digital Section (Digital Audio Interface) 2-9. . . . . . . . . . . . . . .
2−11. DEM-AS/VDAC 2-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1−1. SW001/002/003: For S8414 (DAI Receiver) 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1−2. Audio Interface Format Selection 1-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1−3. De-emphasis Control 1-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-1
Description

The DEM-PCM/DSD1791/1793 is an evaluation module for the 192-kHz,
24-bit stereo differential voltage output DAC PCM/DSD1791/1793 family.
-DEM-PCM1791: PCM1791A. Software control
-DEM-PCM1793: PCM1793. Hardware control
-DEM-DSD1791: DSD1791. Software control
-DEM-DSD1793: DSD1793. I2C control
Topic Page
1.1 Block Diagram 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2 Connections 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3 Operation Control 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.4 Audio Data Interface 1-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.5 Demonstration Software Control 1-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.6 I2C Control 1-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.7 Demonstration Software 1-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.8 DEM/DSD1791/1793 Parts List (BOM) 1-8. . . . . . . . . . . . . . . . . . . . . . . . . . .
1.9 DEM-AS/VDAC Board Section Parts List (BOM) 1-9. . . . . . . . . . . . . . . . . .
Chapter 1

Block Diagram
1-2
1.1 Block Diagram
Figure 1−1.DEM−PCM/DSD1791/1793 Block Diagram
DAC
PCM1791
PCM1793
DSD1791
DSD1793
BAL Amp
with LPF
5534
S/PDIF
COAX IN
DAI
CS8414
Logic
Interface
CN001
S/PDIF
OPT IN
Lch OUT
3.3 V REG
SW001
Register Control
MODE Control
SW001~SW004
DEM-AS/VDAC Daughter Card
AGND+5 V
Analog
+5 V
Digital
CN003
CN058
MODE Control
BAL Amp
with LPF
5534
Rch OUT
AGNDDGND –15 V +15 V
1.2 Connections
The DEM-PCM/DSD1791/1793 can be operated by connecting ±15-V and 5-V
power supplies and the S/PDIF interface.
-CN051 AVCC : 9 V to 15 V Icc = 20 mA, typical
-CN052 GND (analog)
-CN053 AVCC− : –9 V to –15 V Icc = 20 mA, typical
-CN054 VCC : 4.5 V to 5.5 V Icc = 80 mA, typical
(CN058 shorted, default)
-CN055 GND (analog)
-CN056 VCC : 4.5 V to 5.5 V
-CN057 GND (digital)
-CN001 RCA jack : S/PDIF coax input
-U001 TORX : S/PDIF optical input
The S/PDIF interface accepts up to fs= 96 kHz sampling rate, fs= 192 kHz,
24-bit PCM data and 64 fs, 1-bit DSD data can be connected directly on
interface connector. A stereo audio signal can be obtained by connecting RCA
audio cables to the onboard RCA stereo jacks, CN103 and CN104.

Operating Controls
1-3
Description
-CN103: L-channel audio out (2.1 V rms)
-CN104: R-channel audio out (2.1 V rms)
1.3 Operating Controls
1.3.1 SW001, SW002, SW003 DAI PCM Interface Format
These switches select the PCM audio interface format for the S8414 DAI
receiver, and the interface formats are listed in Table 1−1. The default interface
format is 16- to 24-bit I2S.
Table 1−1.SW001/002/003: For S8414 (DAI Receiver)
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)
1.3.2 SW004 Reset for DAI
Switch SW004 is the reset control for the CS8414 DAI receiver.
1.3.3 SW005 DAI/External Interface Selection
Switch SW005 selects whether the S/PDIF inputs for the PCM/DSD1791/1793
are provided through the CS8414 DAI receiver or supplied as external data.
-INT: S/PDIF, DAI receiver data (default)
-EXT: External data
1.3.4 JP001 BCK Selection
Jumper JP001 selects the BCK clock format for the CS8414.
-IIS: I2S right-justified (default)
-24L/J: 24-bit left-justified
1.3.5 SW006 Operation Control for DAC
Switch SW006 is the register reset control for the PCM1791 and DSD1791.
For normal board operation, all four switches must be set to H.
-RESET: H / normal operation (default)
-RESET: L / reset operation
1.3.6 SW001 on Daughter Card − Operation Control for PCM1793
SW001 on the daughter card is the operation control for the PCM1793
hardware model.

Audio Data Interface
1-4
Table 1−2.Audio Interface Format Selection
FMT2
PIN 28 FMT1 PIN 27 FMT0 PIN 26 FORMAT
L L L 16-bit standard format, right-justified
L L H 20-bit standard format, right-justified
L H L 24-bit standard format, right-justified
L H H 24-bit MSB-first, left-justified format
H L L 16-bit l2S format
H L H 24-bit l2S format
H H L Reserved
H H H Reserved
Switches FMT0, FMT1, and FMT2 select the audio interface format for the
PCM1793. The interface formats are listed in Table 1−2.
Table 1−3.De-Emphasis Control
DEMP1
PIN 25 DEMP0 PIN 24 De-Emphasis Function
L L Disabled
L H 48 kHz
H L 44.1 kHz
H H 32 kHz
Switches DEMP0 and DEMP1 select the sampling frequency for which
de-emphasis filtering is performed. The available frequencies are listed in
Table 1−3.
1.4 Audio Data Interface
CN001 on the daughter card selects the data interface. Available choices are
DSD by device type and PCM. The default setting is for the PCM audio data
interface with S/PDIF. The DSD interface can also be connected directly to this
connector.
P-SCLK
MUTE
P-DATA
P-BCK
P-LRCK
DBCK
DSD-R
DSD-L
(DSD)
(DSD)

Demonstration Software Control
1-5
Description
1.4.1 PCM Audio Interface
P-SCLK: SYSTEM CLOCK
P-DATA: DATA clock
P-BCK: BCK clock
P-LRCK: LRCK clock
1.4.2 DSD Audio Interface for PCM1791/1793
P-SCLK: DSD BCK clock
P-LRCK: DSD DATA-R
P-DATA: DSD DATA-L
P-BCK: GND
MUTE: GND
1.4.3 DSD Audio Interface for DSD1791/1793
P-LRCK: GND
P-BCK: GND
P-DATA: GND
DBCK: DSD BCK clock
DSD-L: DSD DATA-L
DSD-R: DSD DATA-R
1.5 Demonstration Software Control
Software provided with the DEM-PCM/DSD1791 allows programming of the
PCM/DSD1791 internal registers. The software operates on computers
running MicrosoftWindows3.1, 95, 98 or 2000. The demonstration
software requires connection of the PC printer port to CN003 of the demo
board using a standard printer port cable. After installing and executing the
demo software, the main window shows register bit codes and the sub-window
shows register control function.
1.6 I2C Control
The DSD1793 has an I2C control function. The I2C interface is provided on
5-pin connector RA001, shown in the following diagram.
NC ADR0 ADR1SCL SDA

Demonstration Software
1-6
1.7 Demonstration Software
Demonstration software is provided to control the PCM1791/DSD1791’s
internal register using a PC running Microsoft Windows. The software requires
the use of a printer cable to connect between the PC and connector CN003
of the DEM-PCM/DSD1791.
The demonstration software includes a total five files in the DEM1791; these
files include the following:
DEM1791.exe
DEM1791.ini
Vbrjp200.dll
Ver.dll
Inpout.dll
Copy these files to a convenient directory (folder) such as
C: DEM1791
Then change the printer-port address in DEM1791.ini to:
&H378, &H278, or &H3BCO (Most PCs use &H378 as the default printer
port address.)

Demonstration Software
1-7
Description
Top Menu Attenuation Window
Operation Window
Function Window

DEM/DSD1791/1793 Parts List (BOM)
1-8
1.8 DEM/DSD1791/1793 Parts List (BOM)
Reference No. Value Part Type Part Number Manufacturer
C001, C002 0.01 µFFilm capacitor AMFF0050J103 Nissei
C004, C006, C008, (C016),
C051, C058 0.1 µFFilm capacitor AMFF0050J104 Nissei
C009 0.068 µFFilm capacitor AMFF0050J683 Nissei
C010, C011, C013, C014,
C055 0.1 µFCeramic capacitor RPE132F104Z50 Murata
C003, C005, C007, C109,
C110, C111, C112 10 µF/16 V Ceramic capacitor ROA-16V100M ELNA
(C015), 052, 053, 054, 057 100 µF/16 V Ceramic capacitor ROA-16V101M ELNA
C101, C102, (C017),
(C018) 10 µF/16 V Ceramic capacitor R3A-16V100M ELNA
C105, C106, C107, C108 2700pF Film capacitor APSF0100J272 Nissei
C012 10 µF/16 V Ceramic capacitor SME16VB10M Nikkemi
C056 10 µF/16 V Tantalum capacitor DN1C100M1S NEC
CN003 L connector 57LE40360-7700(D3) Daiichi Denshi
CN002, CN058, JP002 2-pin connector FFC-2BMEP1 Honda
CN104 RCA (Red) LPR6520-0802 SMK
CN103 RCA (Yellow) LPR6520-0803 SMK
CN001 RCA (Yellow) LPR6520-0804 SMK
CN051 Banana jack (Orange) T-45 (Yellow) Sato Parts
CN052 Banana jack (Green) T-45 (Green) Sato Parts
CN053 Banana jack (Blue) T-45 (Blue) Sato Parts
CN054, CN056 Banana jack (Red) T-45 (Red) Sato Parts
CN055, CN057 Banana jack (Black) T-45 (Black) Sato Parts
CN101, CN102, (CN006),
(CN007) C-T connector XB-3-7-20 MAC8
D001 Diode 1SS133 ROHM
JP001 4-pin connector FFC-4BMEP1 Honda
R001 75 ΩResistor SN14C2C-75ΩF KOA
R003 47 kΩResistor SN14C2C-47kΩF KOA
R002, R004 470 ΩResistor SN14C2C-470ΩF KOA
R101−104, R109−112 360 ΩResistor SN14C2C-360ΩF KOA
R105−108 Resistor
R113, R114 100 ΩResistor SN14C2C-100ΩF KOA
RA001 47k Ω×5 Resistor Array M6-1-473J BI
RA001 5-pin connector FFC-5AMEP1 Honda
RA001 4.7 kΩResistor SN14C2C-4.7kΩF KOA
U001 TOSLINK TORX179P Toshiba
U002 Digital audio I/F receiver IC CS8414-CS Cirrus Logic
U003 Logic IC TC74VHC14F Toshiba
U004 Logic IC TC74HCT32AF Toshiba
U005, U006 Logic IC TC74VHC244F Toshiba
U051 Regulator IC REG1117-3.3 Burr-Brown

DEM-AS/VDAC Board Section Parts List (BOM)
1-9
Description
Reference No. ManufacturerPart NumberPart TypeValue
U101, U102 IC socket DIP 8-pin 100-008-000 3M
SW001, SW002, SW003 DIP switch FT1D-2M Fujisoku
SW004 Push SE FP1D-2M Fujisoku
SW005 DIP SW-2 FT2D-2M Fujisoku
SW006 DIP SW-4 DSS104 Fujisoku
JP101−103
1.9 DEM-AS/VDAC Board Section Parts List (BOM)
Reference No. Value Parts Type Parts Name Manufacturer
C001, C003, C005 10 µF/16 V AL ELE capacitor ROA-16V-100M ELNA
C002 0.1 µFCeramic capacitor RPE132F104Z50 Murata
C004, (C006) 0.1 µF/2125 Ceramic capacitor GRM40F104Z25PT Murata
(C007), (C008) 3900 pF Film capacitor APSF0100J392 Nissei
R001, R002, R003, R004 1 kΩResistor SN14C2C-1kΩF KOA
R005 47 kΩResistor SN14C2C-47kΩF KOA
RA001 47 kΩ×5 Resistor array M6-1-473J Beckman
SW001 DIP SW, 5-contact DSS105 Fujisoku
CN001 5 pins ×3 15-pin connector FFC-15NSM1 Honda
CN002 3 pins 3-pin connector FFC-3AMEP1 Honda
U001 28-pin SSOP DSD1791 Burr-Brown
U001 28-pin SSOP PCM1791 Burr-Brown
U001 28-pin SSOP DSD1793 Burr-Brown
U001 28-pin SSOP PCM1793 Burr-Brown

1-10

2-1
Schematics and Printed-Circuit Boards
   
This chapter presents the DEM-DAI/ASDAC and the DEM-AS/VDAC printed-
circuit boards and schematics
Topic Page
2.1 DEM-DAI/ASDAC Printed-Circuit Board 2-2. . . . . . . . . . . . . . . . . . . . . . . . .
2.2 DEM-AS/VDAC Printed-Circuit Board 2-5. . . . . . . . . . . . . . . . . . . . . . . . . . .
2.3 DEM-DAI/ASDAC Schematic 2-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.4 DEM-AS/VDAC Schematic 2-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter 2

DEM-DAI/ASDAC Printed-Circuit Board
2-2
2.1 DEM-DAI/ASDAC Printed-Circuit Board
Figure 2−1.DEM-DAI/ASDAC Silkscreen