User’s Guide
August 2002
DAV Digital Audio/Speaker SLEU023
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Copyright 2002, 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 2002, Texas Instruments Incorporated
EVM WARNINGS AND RESTRICTIONS It is important to operate this EVM within the input voltage range of 5 V and the output 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. 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 2002, Texas Instruments Incorporated
Contents
Contents 1
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.1 Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.2 Connectors and Jumpers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.3 Switch Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.4 LED Monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-1 1-2 1-2 1-2 1-2
2
Schematic and Printed-Circuit Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 2.1 DEM-PCM2901/2903 Printed-Circuit Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2 2.2 DEM-PCM2901/2903 Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
Figures 1–1 2–1 2–2 2–3 2–4
DEM-PCM2901/2903 Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DEM-PCM2901/2903 Silkscreen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DEM-PCM2901/2903 Top View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DEM-PCM2901/2903 Bottom View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DEM-PCM2901/2903 Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-2 2-2 2-2 2-3 2-4
iii
Contents
iv
Chapter 1
Description The DEM-PCM2901 and DEM-PCM2903 are evaluation boards for Texas Instruments’ newly developed USB interface codecs, PCM2901 and PCM2903. The DEM-PCM2901 includes a PCM2901. It is a self-powered USB codec without an S/PDIF interface. The DEM-PCM2903 includes a PCM2903. It is a self-powered USB codec with an S/PDIF interface. A USB connector is mounted on the DEM-PCM2901/2903. Connecting a USB interface to this USB connector enables the evaluation of codec performance. The DEM-PCM2901/2903 requires a 5-V power supply for the codec and S/PDIF sections and a 5-V power supply for the analog input/output amplifier section. Stereo audio output is available on two RCA jacks. The PCM2901/2903 supports the following USB features: -
Fully compliant with the USB 1.1 specification Full-speed transceivers Partially programmable descriptors USB adaptive mode for playback USB asynchronous mode for record Self-powered
Topic
Page
1.1
Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
1.2
Connectors and Jumpers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
1.3
Switch Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
1.4
LED Monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
1-1
Block Diagram
1.1 Block Diagram Figure 1–1. DEM-PCM2901/2903 Block Diagram CN001 GND +5V S/PDIF IN
TORX CN002
S/PDIF OUT
JP
TOTX
3.3 V REG
Vdd
AND GATE
CN003 USB Interface
USB Connector
Analog Out
Vcc
D+/–
12M XTAL
Rch Analog In
OPA2353 LPF
VINL/R
SW001 – SW003
Lch
OPA2353 LPF
DIN VOUTL/R DOUT PCM2901 PCM2903 VBUS
Lch Rch
SSPND
Operation Control
1.2 Connectors and Jumpers - CN001
: Power supply, 5 V
- CN002
: Jumper (connecting regulated 3.3 V)
- CN003
: USB port (series B connector), connects to USB cable/ connector
- CN101, CN102 : Audio LINE OUT (RCA, 1.98 VPP full scale) - CN103, CN104 : Audio LINE IN (RCA, 1.98 VPP full scale) - U002
: S/PDIF In (DEM-PCM2903 only)
- U003
: S/PDIF Out (DEM-PCM2903 only)
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.
1.4 LED Monitor - D001 (Red): Indicates suspend state
1-2
Chapter 2
Schematic and Printed-Circuit Board This chapter presents the DEM-PCM2901/2903 printed-circuit board and schematic.
Topic
Page
2.1
DEM-PCM2901/2903 Printed-Circuit Board . . . . . . . . . . . . . . . . . . . . . . 2-2
2.2
DEM-PCM2901/2903 Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
Schematic and Printed-Circuit Board
2-1
DEM-PCM2901/2903 Printed-Circuit Board
2.1 DEM-PCM2901/2903 Printed-Circuit Board Figure 2–1. DEM-PCM2901/2903 Silkscreen
Figure 2–2. DEM-PCM2901/2903 Top View
2-2
DEM-PCM2901/2903 Printed-Circuit Board
Figure 2–3. DEM-PCM2901/2903 Bottom View
Schematic and Printed-Circuit Board
2-3
OUT IN GND 1
+
2
C105 330 pF
1 C101 10 µF/16 V
J
+
B S
CN004 DC JACK YKB31–0016 (MAX 6.3 V)
C008
1 2 4 5
U003 TOTX179P
3 0.1 µF C009 10 µF/16 V
C005 0.1 µF
C003 100 µF/16 V
R101 12 kΩ
R103 3.9 kΩ
+ C103 1800 pF
CN003 67068–0001 (GND) (DP) (DM) (VBUS)
4 3 2 1
R107 100 Ω
CN101 RCA pj
C107 + 10 µF/16 V
R106 12 kΩ
+
C011 0.1 µF
U101 OPA2353UA 1/2 2 – 1 3 + 4
C010 0.1 µF 5 TC7SZ08AFE 1 U004 4 2 3
C106 330 pF R005 470 Ω
R001 1.5 kΩ
R003 RA001 1.5 kΩ x 3
22 Ω
2
22 Ω
3 4 5 6 7 8
SW001 SW002 SW003 FT1D-2M FT1D-2M FT1D-2M C012 1.0 µF/16 V
9 10
+
11 12 13 14 +
D+
SSPND
D–
VDDI
VBUS
DGND
DGNDU
DOUT
HID0 HID1 HID2 SEL0 SEL1
DIN
PCM2901/03
R006 1 MΩ
VCCI AGNDX XTI XTO
VCCI AGNDC
VCCI AGNDP
VINL
VCCI
VINR
VOUTL
VCOM
VOUTR
C013 10 µF/16 V
+
D001 TLR218P
U005 1
R002
C102 10 µF/16 V
(C016)
R104 3.9 kΩ
C104 1800 pF
6 5
27
Q001 DTA143ESA
+
26 24
23 (C018) C019 18 pF 22
X001 12 MHz
21 R004
20 19
1 MΩ
7
R108 100 Ω
CN102 RCA pj
+
C110 330 pF
C020 18 pF C108 R109 10 µF/16 V 100 Ω +
8
–
7 +
C116 10 µF/16 V
U102 OPA2353UA 1/2
(C017)
18
8
R111 12 kΩ
C015 10 µF/16 V
25
–
U101 OPA2353UA 2/2
28
+
6
R113 3.9 kΩ
C114 R115 10 µF/16 V 12 kΩ
CN103 RCA pj
+ 5
C112 1800 pF
17 R112 12 kΩ
16 15
C111 330 pF +
C014 10 µF/16 V
C109 R110 10 µF/16 V 100 Ω +
NOTE: On the PCM2901, pin 24 and pin 25 are test pins.
R102 12 kΩ
1
U102 4 OPA2353UA 2/2
– +
2
R114 3.9 kΩ
C115 R116 10 µF/16 V 12 kΩ +
3
C113 1800 pF
CN104 RCA pj
DEM-PCM2901/2903 Schematic
+
C004 0.1 µF
2.2 DEM-PCM2901/2903 Schematic
2 3 4 5
U002 TORX179P
1 C007 10 µF/16 V
R105 12 kΩ
Figure 2–4. DEM-PCM2901/2903 Schematic
2-4
CN001 B2P–VH CN002 FFC-12BMEP1 U001 C006 REG1117–3.3 10 µF/16 V 2 3
