Datasheet

Preliminary Technical Data EVAL-AD1940AZ
Rev. PrA | Page 19 of 30
ANALOG AUDIO INPUT FILTERS
Analog Inputs 0-1
Analog Inputs 2-3
Analog Inputs 4-5
Op-Amp Supplies
2
-
3
+
1
U18-A
AD8606AR
6
-
5
+
7
U18-B
AD8606AR
C62 C63
C64
120pF
R16
237r
R17
5k76
R18
5k76
R19
OPEN
R20
5k76
R21
5k76
R22
237r
+
C65
10uF
+
C66
10uF
R23
237r
R24
5k76
R25
5k76
R26
OPEN
R27
5k76
R28
5k76
R29
237r
C67
120pF
C68
C69
2
-
3
+
1
U19-A
AD8606AR
6
-
5
+
7
U19-B
AD8606AR
6
-
5
+
7
U21-B
AD8606AR
2
-
3
+
1
U21-A
AD8606AR
C70
C71
C72
120pF
R30
237r
R31
5k76
R32
5k76
R33
OPEN
R34
5k76
R35
5k76
R36
237r
+
C73
10uF
+
C74
10uF
R37
237r
R38
5k76
R39
5k76
R40
OPEN
R41
5k76
R42
5k76
R43
237r
C75
120pF
C76
C77
6
-
5
+
7
U20-B
AD8606AR
2
-
3
+
1
U20-A
AD8606AR
C78
C79
C80 C81
C82 100pF
R44 49k9
TP53
C83 100pF
R45 49k9
TP54
C84 100pF
R46 49k9
TP55
C85 100pF
R47 49k9
TP56
RING
SLEEVE
TIP
J
15
RING
SLEEVE
TIPJ16
R48
100R
C86
0.10uF
2
-
3
+
1
U22-A
AD8606AR
6
-
5
+
7
U22-B
AD8606AR
C87 C88
C89
120pF
R49
237r
R50
5k76
R51
5k76
R52
OPEN
R53
5k76
R54
5k76
R55
237r
+
C90
10uF
+
C91
10uF
R56
237r
R57
5k76
R58
5k76
R59
OPEN
R60
5k76
R61
5k76
R62
237r
C92
120pF
C93
C94
2
-
3
+
1
U23-A
AD8606AR
6
-
5
+
7
U23-B
AD8606AR
C95
C96
C97 100pF
R63 49k9
TP57
C98 100pF
R64 49k9
TP58
RING
SLEEVE
TIPJ17
R65
100R
C99
0.10uF
R66
100R
C100
0.10uF
R67
100R
C101
0.10uF
R68
100R
C102
0.10uF
R69
100R
C103
0.10uF
4
V-
8
V+
U20-C
AD8606AR
C51
4
V-
8
V+
U22-C
AD8606AR
C52
4
V-
8
V+
U21-C
AD8606AR
C53
4
V-
8
V+
U18-C
AD8606AR
4
V-
8
V+
U19-C
AD8606AR
C58
4
V-
8
V+
U23-C
AD8606AR
C59
C60
1939_IN1L-
1939_IN1L+
1939_IN1R+
1939_IN1R-
1939_IN2R-
1939_IN2R+
1939_IN2L+
1939_IN2L-
1974_IN3L-
1974_IN3L+
1974_IN3R
+
1974_IN3R
-
FILTR
FILTR
FILTR
FILTR
FILTR
FILTR
A3V3
Figure 23. Analog Audio Input Filters Schematics