WM8733 Datasheet, PDF (10/11 Pages) Wolfson Microelectronics plc – 102dB Stereo DAC

WM8733
RECOMMENDED EXTERNAL COMPONENTS
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FROM AUDIO
PROCESSOR
ANALOGUE
OUTPUT FOR
RIGHT
CHANNEL
10µF ₊
External
LPF
1 _LRCIN
2 DIN
3 BCKIN
4 SEL0
5 CAP
6 VOUTR
7 GND
SCKI 14
256fs/384fs/512fs CLK
FORMAT 13
WM8733
DEEMPH 12
SEL1 11
MUTE 10
VOUTL 9
VDD 8
(diode allows automute operation)
External
LPF
ANALOGUE
OUTPUT FOR
LEFT CHANNEL
GND
10µF
VDD
0.1µF
Figure 5 Applications Diagram
DETAIL OF APPLICATION DIAGRAM SHOWING THE EXTERNAL LOW POWER FILTER
External LPF
x2 for Stereo Operation
+ ^10kΩ
Vin
-
10kΩ
680pF
1500pF
10kΩ
-
+
100pF
Filtered
Analogue
Output
Figure 6 Third-Order Low Pass Filter (LPF) Example
An external low pass filter is recommended if the device is driving a wide band amplifier, as shown in
Figure 6. In some applications, second-order or passive RC filter may be adequate.
WOLFSON MICROELECTRONICS LTD
PP Rev 1.3 July 2000
10