Datasheet

TypicalCircuitConnection1(ExampleofUSBSpeaker)
TEST0
XTO
28
27
26
25
24
23
22
21
20
19
1
2
3
4
5
6
7
8
9
10
PCM2704DB
CK
DT
PSEL
(2)
DOUT
DGND
V
DD
D–
D+
V
BUS
SSPND
HOST
(2)
XTI
TEST1
HID2/MD
PGND
V
CCP
(3)
HID0/MS
HID1/MC
ExternalROM
(3)
(Optional)
SCL
11
12
13
14
ZGND
AGNDL
V
CCL
V
OUT
L
(1)
18
17
16
15
AGNDR
V
CCR
V
OUT
R
(1)
V
COM
R
9
C
4
D–
D+
GND
R
1
C
2
X
1
C
1
SDA
S/PDIFOUT
C
7
R
2
USB ’B’
Connector
V
BUS
C
3
R
3
R
4
C
6
SUSPEND
C
5
+
C
8
+
C
9
+
C
10
C
11
R
5
C
12
R
6
R
7
R
8
TPA200X
Power
Amp
VOLUME–
VOLUME+
MUTE
C
13
+
C
14
+
PCM2704, ,PCM2705
PCM2706,PCM2707
SLES081F–JUNE2003–REVISEDJANUARY2009....................................................................................................................................................... www.ti.com
Figure32illustratesatypicalcircuitconnectionforaninternal-descriptor,bus-powered,500-mAapplication.
NOTE:X
1
:12-MHzcrystalresonator.C
1
,C
2
:10-pFto33-pFcapacitor(dependingonloadcapacitanceofcrystalresonator).C
3
-C
7
:1-µF
ceramiccapacitor.C
8
:10-µFelectrolyticcapacitor.C
9
,C
10
:100-µFelectrolyticcapacitor(dependingontradeoffbetweenrequiredfrequency
responseanddischargetimeforresume).C
11
,C
12
:0.022-µFceramiccapacitor.C
13
,C
14
:1-µFelectrolyticcapacitor.R
1
:1MΩresistor.R
2
,
R
9
:1.5kΩresistors.R
3
,R
4
:22Ωresistors.R
5
,R
6
:16Ωresistors.R
7
,R
8
:330Ωresistors(dependingontradeoffbetweenrequiredTHD
performanceandpop-noiselevelforsuspend).
(1)OutputimpedanceofV
OUT
LandV
OUT
Rduringsuspendmodeorlackofpowersupplyis26kΩ±20%,whichisthedischargepathforC
9
andC
10
.
(2)DescriptorprogrammingthroughexternalROMisonlyavailablewhenPSELandHOSTarehigh.
(3)ExternalROMpowercanbesuppliedfromV
CC
P,butanyotheractivecomponentmustnotuseV
CCP
,V
CCL
,V
CCR
,orV
DD
asapower
source.
Figure32.Bus-PoweredApplication
NOTE:
ThecircuitillustratedinFigure32isforinformationonly.Theentireboarddesign
shouldbeconsideredtomeettheUSBspecificationasaUSB-compliantproduct.
28SubmitDocumentationFeedbackCopyright©2003–2009,TexasInstrumentsIncorporated
ProductFolderLink(s):PCM2704PCM2705PCM2706PCM2707
PCM2704 and PCM2705
Not Recommended For New Designs