Datasheet
1
2
3
4
5
6
7
8
24
23
22
21
20
19
18
17
V
COM
32
FSEL
9
AGNDR
31
TEST
10
V
CCR
30
SSPND
11
V R
OUT
(1)
29
XTI
12
V L
OUT
(1)
28
XTO
13
V
CCL
27
CK
14
AGNDL
26
DT
15
ZGND+
25
PSEL
(2)
16
PGND
V
CCP
(3)
HOST
(2)
FUNC3
FUNC0
HID0/MS
HID1/MC
HID2/MD
V
BUS
D+
D-
V
DD
DGND
FUNC1
FUNC2
DOUT
PCM2707CPJT
+
+
C
5
C
3
C
4
C
6
SUSPEND
R
1
R
4
R
3
R
12
R
2
(3)
R
5
C
2
C
7
X
1
C
1
GND
USB ‘B’
Connector
D-
D+
V
BUS
(3)
+
C
8
+
C
9
R
10
R
11
R
6
C
11
C
10
R
7
R
8
R
9
Headphone
Power
3.3 V
GND
TAS300x
(4)
2
I S I/F
Audio Device
DIN
LRCK
MS
MC
MD
BCK
SYSTEM CLOCK
DOUT
(3)
PCM2704C, PCM2705C
PCM2706C, PCM2707C
SBFS036A –AUGUST 2011–REVISED JULY 2012
www.ti.com
Typical Circuit Connection 3: DSP Surround Processing Amplifier
Figure 36 illustrates a typical circuit connection for an I
2
S- and SPI-enabled self-powered application.
NOTE: X
1
: 12-MHz crystal resonator. C
1
, C
2
: 10-pF to 33-pF capacitors (depending on load capacitance of crystal resonator). C
3
, C
4
: 1-μF
ceramic capacitors. C
5
, C
7
: 0.1-μF ceramic capacitor and 10-μF electrolytic capacitor. C
6
: 10-μF electrolytic capacitors. C
8
, C
9
: 100-μF
electrolytic capacitors (depending on required frequency response). C
10
, C
11
: 0.022-μF ceramic capacitors. R
1
, R
12
: 1-MΩ resistors. R
2
, R
5
:
1.5-kΩ resistors. R
3
, R
4
: 22-Ω resistors. R
6
, R
7
: 16-Ω resistors. R
8
to R
11
: 3.3-kΩ resistors.
(1) Output impedance of V
OUT
L and V
OUT
R during suspend mode or lack of power supply is 26 kΩ ±20%, which is the discharge path for C
8
and C
9
.
(2) Descriptor programming through SPI is only available when PSEL and HOST are high.
(3) D+ pull-up must not be activated (high: 3.3 V) while the device is detached from USB or power supply is not applied on V
DD
and V
CCx
.
V
BUS
of USB (5 V) can be used to detect USB power status.
(4) MS must be high until the PCM2707C power supply is ready and the SPI host (the DSP) is ready to send data. Also, the SPI host must
handle the D+ pull-up if the descriptor is programmed through the SPI. D+ pull-up must not be activated (high = 3.3 V) before programming of
the PCM2707C through the SPI is complete.
Figure 36. Self-Powered Application
NOTE
The circuit illustrated in Figure 36 is for information only. The entire board design should
be considered to meet the USB specification as a USB-compliant product.
32 Submit Documentation Feedback Copyright © 2011–2012, Texas Instruments Incorporated
Product Folder Link(s): PCM2704C PCM2705C PCM2706C PCM2707C