alc268 Realtek Semiconductor Corporation, alc268 Datasheet - Page 73

• Manufacturer Part Number: alc268
• Description: 2+2 Channel High Definition Audio Codec
• Manufacturer: Realtek Semiconductor Corporation

10. Application Notes
10.1. Application Circuits
Please contact Realtek for the latest application circuits. To get the best compatibility in hardware design
and software driver, any modification should be confirmed by Realtek. Realtek may upload the latest
application circuits onto our web site (www.realtek.com.tw) without modifying this datasheet.
10.2. Filter Connection
2+2 Channel High Definition Audio Codec
+5VA
MIC2-JD
C14
S/PDIF-OUT
10u
DMIC-CLK
EAPD
+
R1
C15
0.1u
DMIC-34 or GPIO3
Tied at one point only under the
codec or near the codec
DMIC-12 or GPIO0
DGND
20K, 1%
R5
20K, 1%
MONO-OUT
HP-OUT-R
HP-OUT-L
+3.3VD
LOUT-L
LOUT-R
37
38
39
40
41
42
43
44
45
46
47
48
C23
10u
+
MONO
AVDD2
HP-OUT-L
JDREF
HP-OUT-R
AVSS2
NC
NC
NC
DMIC-CLK
EAPD
SPDIFO
AGND
C25
0.1u
Figure 19. Filter Connection
ALC268/
ALC268-VB
ALC268
C36
10p
65
C34
10p
GPIO1 (Power by AVDD)
C28
10p
+
10u
C5
C30
0.1u
R16
R13
R17
R11
CD-GND
LINE1-R
Sense A
LINE1-L
MIC1-R
MIC2-R
MIC1-L
MIC2-L
C26
10
10
10
CD-R
10
CD-L
C29
10u
NC
NC
+
NC
MIC1-VREFO-R
MIC2-VREFO
MIC1-VREFO-L
24
23
22
21
20
19
18
17
16
15
14
13
U1
C24
Track ID: JATR-1076-21
+3.3VD
C8
0.1u
C16
C17
C19
RESET#
SY NC
SDIN
SDOUT
BCLK
1u
MIC2-R
MIC2-L
1u
1u
1u
+
C7
10u
C27
100P
+5VA
R6
R7
R8
R9
ALC268 Series
R12
10K
R10
LINE1-R
LINE1-L
MIC1-R
MIC1-L
5.1K, 1%
39.2K,1%
10K, 1%
20K, 1%
47K
Datasheet
4
3
2
1
CD-IN
CN1
MIC1-JD
HP-JD
LOUT-JD
CN2
1
2
LINE1-JD
BEEP_IN
Rev. 1.3