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1
2
2
3
3
4
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D D
C C
B B
A A
Check REV
Description
Title:
Size
A2
Number
Revision
Date :
File Name:
Sheet of
Design By :
DATEDesignApproval
2013/11/29
0PC13A022
LXAN AUDIO
AUDIO.SchDoc
1 6
ALESIS
INVERTING INPUT NON-INV ERTING INPUT
GAIN
LINE / MIC IN
PREAMP
DAC LPF
MIX
TRS OUT
DIRECT MONITOR ON/OFF
Mic Gain =
(((Rg/2)//Re) + Rf)/(((Rg/2)//Re)*2)
Rg= resistance between emitters
MAX TRS OU T = 7Vpp = +7.87dBV
Gain = +9.63dB (2.31Vpp -> 7.0Vpp)
INPUT BUS
2ND ORDER BUTTERW ORTH
FC = 48kHz
Max O utput = 0.70 x 3.3VA = 2.31Vpp
1
2
3
4
5
6
8
9
10
11
7
J14
C40
47uF/6.3V
C41
47uF/6.3V
D9
MMBD4148
D10
MMBD4148
D11
MMBD4148
D12
MMBD4148
Q4
MBT4403
Q5
MBT4403
+
10
-
9
8
U6C
MC33079
+
12
-
13
14
U6D
MC33079
C44
2200uF/6.3V
1
2
3
P1
5KC
C50
22uF/16V
C51
22uF/16V
411
U6E
MC33079
+
10
-
9
8
U8C
MC33079
+
12
-
13
14
U8D
MC33079
411
U8E
MC33079
Q11
2SD2114K
Q12
2SD2114K
3
4
7
8
11
12
13
J7B
DUAL STEREO
1
2
5
6
9
10
J7A
DUAL STEREO
4
5
6
S1B
SWDS-11L-C2
1
2
3
S1A
SWDS-11L-C2
+
3
-
2
1
U6A
MC33079
+
5
-
6
7
U6B
MC33079
+
3
-
2
1
U22A
MC33079
+
5
-
6
7
U22B
MC33079
411
U22E
MC33079
+
10
-
9
8
U22C
MC33079
+
12
-
13
14
U22D
MC33079
CHGND
AGND
AGND
AGND
AGND
AGNDAGND
AGND
CHGND
MUTE
MUTE
INPUT_L
AGND
AGND
OUT_L
OUT_R
TRS_OUT-L
TRS_OUT-R
TRS_OUT-L
TRS_OUT-R
OUT_R
OUT_L
1
2
3
4
5
6
7
8
9
10
CN202
MUTE
+50V
AGND AGND
Q8
BC856
Q9
BC856
AGNDAGNDAGND
AGND
AGND
AGND
AGND
AGND
AGND
AGND
AGND
AGND
AGND
AGND
AGND
AGND
AGND
AGND
A+3.3VA+5V
R26
47-1206
R24
47-1206
AGNDAGND
D+5V
MCLK
LRCK
BCLK
SDIN
SDOUT
AOUTA
AOUTB
AOUTA
AOUTB
AGNDAGND
A+3.3V
CODEC_RST
AGND
AGND
AGND
A+3.3V
AGND
AGND
DNS
1
2
3
D5
DNS
1
2
3
D6
AGND
AGND
AGND
A+12V
A+12V
A+12V
A+12V
A+12V
A-12V
A-12V
A-12V
R104
47K
R105
47K
R118 100k R119 100k
R85
15K
R103
15K
R112
15K
R117
15K
C144 100pF
C145 100pF
C154 100pF
C155 100pF
C42
100pF
R47
3.92k 1%
R48
3.92k 1%
C45 0.1uF
C43
100pF
R57 7.5k 1%
R58 7.5k 1%
R56 7.5k 1%
R59 7.5k 1%
C49 47pF
R61 3.32k 1%
R51
2.00k 1%
R52
2.00k 1%
R53
330 ohm
C46 0.1uF
R54 1.00k 1%
R55 1.00k 1%
C47 15pF
C48
15pF
R69 1.50k 1%
R102 1.50k 1%
C146 47pF
C147 47pF
R81
1.50k 1%
R84
1.50k 1%
R122 1.00k 1%
R124 1.00k 1%
R134 1K
R135 1K
C88
100pF
C89
100pF
C90
100pF
C91
100pF
R123
1K
R125
1K
C62
0.1uF
C63
0.1uF
C80
0.1uF
C81
0.1uF
C56
0.1uF
C57
0.1uF
R94
100k
R99
100k
R95
3.65k 1%
R100
3.65k 1%
C66 470pF
C71 470pF
R96
13.7K 1%
R101
13.7K 1%
C16
470pF
C69
470pF
R92
10K
R97
10K
R93
20.5k 1%
R98
20.5k 1%
R111 10K
R109 10K
R108 10K
C143 47pF
R110 10K
R107 10K
R106 10K
C142 47pF
C7
220pF
C8
220pF
C10
0.1uF
C9
10uF,16V
C11
0.1uF
C17
47uF/16V
C1
10uF,16V
C5 0.1uF
C2 10uF,16V
C4 0.1uF
R6 4.7K
R4 33
R15 33
R5 33
R9 33
R11 33
R23
0
C27
0.1uF
R25 10K
C29
0.1uF
R27 0
C26
0.1uF
SDIN
1
LRCK
2
MCLK
3
SCLK
4
VD
5
DGND
6
SDOUT
7
VLC
8
SDA/CDOUT(M1)
9
SCL/CCLK(M0)
10
AD0/CS(I2S/LJ)
11
AD1/CDIN(MDIV1)
12
AD2(MDIV2)
13
RST
14
AINA
15
AINB
16
VQ
17
FILT+
18
VA
19
AGND
20
MUTEA
21
AOUTA
22
AOUTB
23
MUTEB
24
U1
CS4270
C28
10uF/16V
C25
10uF
GND
2
OUT
5
IN
1
EN
3
N.C
4
IC1
TLV70033DDCT
C3
10uF/16V
C6
10uF/16V
A-12V
DAC_SCL
DAC_SDA
R45
10 ohm
R46
10 ohm
R49
1.21k 1%
R50
1.21k 1%
R3
1K
R16
1K
R1 2K
R12 2K
C159
10uF/16V
C160
10uF/16V
A+5V
84
+V
-V
U12C
TLO72
AGND
C161
0.1uF
C162
0.1uF
C18
3.3uF,25V
C67
3.3uF,25V
R205
100 ohm
C166
0.1uF
AGND
R2
DNS
R204 0
R66
10 ohm
R67 4.7k
R68 4.7k
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