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WM8740SEDS/V Datasheet(PDF) 24 Page - Wolfson Microelectronics plc

No. de pieza WM8740SEDS/V
Descripción Electrónicos  24-bit, High Performance 192kHz Stereo DAC
PDF  27 Pages
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Fabricante Electrónico  WOLFSON [Wolfson Microelectronics plc]
Página de inicio  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8740SEDS/V Datasheet(HTML) 24 Page - Wolfson Microelectronics plc

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WM8740
Production Data
w
PD, Rev 4.4, April 2010
24
APPLICATIONS INFORMATION
RECOMMENDED EXTERNAL COMPONENTS
28
DVDD
DGND
ML/I2S
AGND
AVDDL
AVDD
11
VMIDR
C 1
1
C 1
0
C
9
AGND
8
7
Software I/F or
Hardware Control
WM8740
Notes: 1.
AGND and DGND should be connected as close to the WM8740 as possible.
2. C
2
to
C 5
,
C 9
and C 1
1
should be positioned as close to the WM8740 as possible.
3.
Capacitor type used can have a big effect on device performance. It is
recommended that capacitors with very low ESR are used and that ceramics are
either NPO or COG type material to achieve best performance from the WM8740.
AVDDR
AGNDR
AGNDL
C
3
C
4
C
5
C
6
AGND
C
2
DVDD
C
1
27
MC/DM1
26
MD/DM0
23
CSB/IWO
22
RSTB
4
MODE8X
6
DIFFHW
21
ZERO
AVDD
AVDD
R
1
18
VMIDL
C 1
2
1
LRCIN
2
DIN
3
BCKIN
5
SCLK
Audio Serial Data I/F
System Clock Input
DGND
+
+
+
+
15
9
20
14
10
19
24
MODE
25
MUTEB
VOUTRN
VOUTRP
-
-
+
+
13
12
LEFT OUTPUT DATA
RIGHT OUTPUT DATA
VOUTLP
17
VOUTLN
16
R
2
R
2
Figure 25 External Components Diagram
RECOMMENDED EXTERNAL COMPONENTS VALUES
COMPONENT
REFERENCE
SUGGESTED
VALUE
DESCRIPTION
C1 and C6
10
μF
De-coupling for DVDD and AVDD.
C2 to C5
0.1
μF
De-coupling for DVDD and AVDD.
C7 and C8
10
μF
Output AC coupling caps to remove VMID DC level from outputs.
C9 and C11
0.1
μF
Reference de-coupling capacitors for VMIDR and VMIDL.
C10 and C12
10
μF
R1
10k
Ω
Resistor to AVDD for open drain output operation.
R2
51
Ω
Source termination resistors.
Table 21 External Components Description



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