WM8726
Production Data
APPLICATIONS INFORMATION
RECOMMENDED EXTERNAL COMPONENTS
VDD
8
VDD
+
C1
C2
7
GND
AGND
13
12
10
FORMAT
DEEMPH
MUTE
Hardware Control
C3
C4
6
9
VOUTR
VOUTL
AC-Coupled
VOUTR/L
to External LPF
WM8726
1
LRCIN
MCLK
14
3
2
Audio Serial Data I/F
BCKIN
DIN
5
CAP
+
C5
C6
AGND
Notes:
1. C2, C5 should be positioned as close to the WM8726 as possible.
2. Capacitor types should be carefully chosen. Capacitors with very low ESR are
recommended for optimum performance.
3. C3 and C4 not required if using the recommended low pass filter in Figure 20.
Figure 19 External Component Diagram
RECOMMENDED EXTERNAL COMPONENTS VALUES
COMPONENT
REFERENCE
SUGGESTED
VALUE
DESCRIPTION
C1
C2
10µF
0.1µF
10µF
0.1µF
10µF
De-coupling for VDD
De-coupling for VDD
C3 and C4
C5
Output AC coupling caps to remove midrail DC level from outputs
Reference de-coupling capacitors for CAP pin
C6
Table 7 External Components Description
PD Rev 4.1 September 2005
17
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WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
