Texas Instruments DEM-PCM2900 EVM User manual

 
August 2002 DAV Digital Audio/Speaker
User’s Guide
SLEU024

IMPORTANT NOTICE
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enhancements, improvements, and other changes to its products and services at any time and to discontinue
any product or service without notice. Customers should obtain the latest relevant information before placing
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and conditions of sale supplied at the time of order acknowledgment.
TI warrants performance of its hardware products to the specifications applicable at the time of sale in
accordance with TI’s standard warranty. Testing and other quality control techniques are used to the extent TI
deems necessary to support this warranty. Except where mandated by government requirements, testing of all
parameters of each product is not necessarily performed.
TI assumes no liability for applications assistance or customer product design. Customers are responsible for
their products and applications using TI components. To minimize the risks associated with customer products
and applications, customers should provide adequate design and operating safeguards.
TIdoesnotwarrantorrepresentthatanylicense, eitherexpress orimplied, isgranted underanyTIpatentright,
copyright,maskworkright,orotherTIintellectualpropertyrightrelatingtoanycombination,machine,orprocess
inwhichTIproductsorservicesareused.InformationpublishedbyTIregardingthird–partyproductsorservices
does not constitute a license from TI to use such products or services or a warranty or endorsement thereof.
Use of such information may require a license from a third party under the patents or other intellectual property
of the third party, or a license from TI under the patents or other intellectual property of TI.
Reproduction of information in TI data books or data sheets is permissible only if reproduction is without
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Mailing Address:
Texas Instruments
Post Office Box 655303
Dallas, Texas 75265
Copyright 2002, Texas Instruments Incorporated

EVM IMPORTANT NOTICE
Texas Instruments (TI) provides the enclosed product(s) under the following conditions:
Thisevaluationkit being soldbyTI is intendedforuse 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.
ShouldthisevaluationkitnotmeetthespecificationsindicatedintheEVMUser’sGuide,thekitmaybereturned
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,ORSTATUTORY,INCLUDINGANYWARRANTYOF MERCHANTABILITYORFITNESSFORANY
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
receivedmaynotberegulatorycompliant oragency certified (FCC,UL, CE,etc.). Dueto theopen construction
oftheproduct,itistheuser’sresponsibilitytotakeanyandallappropriateprecautionswithregardtoelectrostatic
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’sGuidepriortohandlingtheproduct.Thisnoticecontainsimportantsafetyinformationabouttemperatures
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 2002, Texas Instruments Incorporated

EVM WARNINGS AND RESTRICTIONS
Itisimportant tooperate thisEVMwithin theinput voltagerangeof 5V andtheoutput voltage
range of 5 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.
Applyingloadsoutsideofthespecifiedoutputrangemayresultinunintendedoperationand/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.
Duringnormaloperation,somecircuitcomponentsmayhavecasetemperaturesgreaterthan
55°C.TheEVM isdesignedto operateproperlywith certaincomponentsabove 55°C aslong
astheinputandoutput rangesare maintained.Thesecomponentsincludebut arenot limited
tolinearregulators,switchingtransistors,passtransistors,andcurrentsenseresistors.These
typesof devicescanbeidentifiedusingtheEVM schematiclocated intheEVMUser’sGuide.
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 2002, Texas Instruments Incorporated

Contents
v
Contents
1 Description 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.1 Block Diagram 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2 Connection Setting 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3 Switch Settings 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2 Schematic and Printed-Circuit Board 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.1 DEM-PCM2900/2902 Printed-Circuit Board 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2 DEM-PCM2900/2902 Schematic 2-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figures
1–1 DEM-PCM2900/2902 Block Diagram 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2–1 DEM-PCM2900/2902 Silkscreen 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2–2 DEM-PCM2900/2902 Top View 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2–3 DEM-DAI/DAC Bottom View 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2–4 DEM-PCM2900/2902 Schematic 2-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Contents
vi

1-1
Description
The DEM-PCM2900 and DEM-PCM2902 are evaluation boards for the newly
developed Texas Instruments USB interface codecs, PCM2900 and
PCM2902. The DEM-PCM2900 includes a PCM2900. It is a bus-powered
USB codec without an S/PDIF interface. The DEM-PCM2902 includes a
PCM2902. It is a bus-powered USB codec with an S/PDIF interface.
A USB connector is mounted on DEM-PCM2900/2902. Connecting a USB
interface to this connector enables the evaluation of codec performance.
TheDEM-PCM2900/2902 is operated bythe5-Vbus power supply oftheUSB.
A3.3-VICregulator ismountedontheboardto providepowerorthecodecand
analog circuitry.
Stereo audio output is available on a stereo minijack.
The PCM2900/2902 supports the following USB features:
-Fully compliant with the USB 1.1 specification
-Partially programmable descriptors
-USB adaptive mode for playback
-USB asynchronous mode for record
-Bus powered
-Full-speed transceivers
Topic Page
1.1 Block Diagram 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2 Connection Setting 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3 Switch Settings 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter 1

Block Diagram
1-2
1.1 Block Diagram
Figure 1–1.DEM-PCM2900/2902 Block Diagram
PCM2900
PCM2902
S/PDIF IN
S/PDIF OUT
USB
Connector
USB Interface
SW001 –SW003
Operation Control
3.3 V
REG
12M XTAL
CN002
CN001
Analog Out
Lch
Rch
SSPND
VOUTL/R
VINL/R
DIN
DOUT
D+/–
VBUS
OPA2353
LPF
OPA2353
LPF
CN101
Analog In
Lch
Rch
CN102
1.2 Connection Setting
-CN001 : USB port (series B connector), connects to a USB cable/
connector
-CN101 : Audio LINE OUT (stereo minijack, 1.98 VPP full scale)
-CN102 : Audio LINE IN (stereo minijack, 1.98 VPP full scale)
-CN002 : S/PDIF IN/OUT for DEM-PCM2902
GND GND
OUT IN
1.3 Switch Settings
-SW001: HID key state (mute)
-SW002: HID key state (volume up)
-SW003: HID key state (volume down)
These switches should be set to LOW logic level for software control, or
toggled HIGH for manual control of their respective parameters.

2-1
Schematic and Printed-Circuit Board
Schematic and Printed-Circuit Board
This chapter presents the DEM-PCM2900/2902 printed-circuit board and
schematic.
Topic Page
2.1 DEM-PCM2900/2902 Printed-Circuit Board 2-2. . . . . . . . . . . . . . . . . . . . . .
2.2 DEM-PCM2900/2902 Schematic 2-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter 2

DEM-PCM2900/2902 Printed-Circuit Board
2-2
2.1 DEM-PCM2900/2902 Printed-Circuit Board
Figure 2–1.DEM-PCM2900/2902 Silkscreen
Figure 2–2.DEM-PCM2900/2902 Top View

DEM-PCM2900/2902 Printed-Circuit Board
2-3
Schematic and Printed-Circuit Board
Figure 2–3.DEM-PCM2900/2902 Bottom View

DEM-PCM2900/2902 Schematic
2-4
2.2 DEM-PCM2900/2902 Schematic Figure 2–4.DEM-PCM2900/2902 Schematic
U002
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
PCM2900/02
D+
D–
VBUS
DGNDU
HID0
HID1
HID2
SEL0
SEL1
VCCI
AGNDC
VINL
VINR
VCOM
SSPND
VDDI
DGND
DOUT
DIN
VCCI
AGNDX
XTI
XTO
VCCI
AGNDP
VCCI
VOUTL
VOUTR
SW003
FT1D-2M
SW001
FT1D-2M SW002 FT1D-2M
RA001
1.5 kΩx 3
C003
1.0 µF
C004
1.0 µF
(GND)
(DP)
(DM)
(VBUS)
CN001
67068–0001
R003 22 Ω
R002 22 Ω
4
3
2
1
R001
1.5 kΩ
CN002
FFC-10BMEP1
C005
1.0 µF
R005 1 MΩ
C009
18 pF C010
18 pF
X001
12 MHz
45
U001
REG103GA-A
C001
0.1 µF+
–
+
C101
10 µF/16 V R101
12 kΩ
C103
1800 pF
R103
3.9 kΩ2
31
U101
OPA2353UA
1/2
R105
12 kΩ
C105
330 pF
4
R107
100 Ω
+
C107
10 µF/16 V
+
–
+
C102
10 µF/16 V R102
12 kΩ
C104
1800 pF
R104
3.9 kΩ6
57
U101
OPA2353UA
2/2
R106
12 kΩ
C106
330 pF
8R108
100 Ω
+
–
C112
1800 pF
R113
3.9 kΩ
6
5
U102
OPA2353UA
1/2
R111
12 kΩ
C110
330 pF R115
12 kΩ
+
C114
10 µF/16 V
C116
10 µF/16 V
+
C108
10 µF/16 V R109
100 Ω78
+
+
–
C113
1800 pF
R114
3.9 kΩ
2
3
U102
OPA2353UA
2/2
R112
12 kΩ
C111
330 pF R116
12 kΩ
+
C115
10 µF/16 V
+
C109
10 µF/16 V R110
100 Ω1
4
NOTE: On the PCM2900, pin 24 and pin 25 are test pins.
R004
Jumper
2 (R1)
1 (S)1
CN101
Stereo Mini-jack
YKB21–5274
Adj EN
3
GND
OUTIN
12
C002
1.0 µF
R007
12 kΩ
R006
22 kΩ
C006
1.0 µF
C007
1.0 µF
C008
1.0 µF
3 (T)
S/PDIF Out S/PDIF In SEL1 SEL0 REG-VCC
2 (R1)
1 (S)1
CN102
Stereo Mini-jack
YKB21–5274
3 (T)