
1
2
3
4
5
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8
A
B
C
D
8
7
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4
3
2
1
D
C
B
A
ISSUE
DRAWING NO.
23425
DRAWING TITLE
Drawn by:
DATE
Filename
ECO No.
DESCRIPTION OF CHANGE
J:\Change Control\ECO AGENDA\02 E000 L878 cap voltage correction\L878 3.3A.ddb - Documents\L878C5 3.3A.sch
A & R Cambridge Ltd.
Pembroke Avenue
Denny Industrial Centre
Waterbeach
Cambridge CB5 9PB
DVD AV PCB - DACs
Circuit Diagram
L878C5
PG
7-Jan-2002
INITIALS
Date Printed
5
7
Sheet
of
Notes:
LRCK_DAC_L
AD_DAC_L
BCK_DAC_L
CK256FS DAC L
ML_8716_L
MD
MC
NRESET
+5V_DAC_L
+5V_DAC_L
L9
33UH SM
R8110R SM
C82
1N0 PP
C83
1N0 PP
C86
220P PP
C87
220P PP
3
2
1
Z19A
OPA2134PA SM
2nd order Butterworth LPF
with differen ial i/p
Fc=50K, Av=1
LEFT DAC
5
6
7
Z19B
OPA2134PA SM
Gain of -2 for HDCD
O herwise -1
Signal phase is preserved at o/p
SCART_L
+5V_DAC_R
+5V_DAC_R
L10
33UH SM
C84
1N0 PP
C85
1N0 PP
C88
220P PP
C89
220P PP
3
2
1
Z20A
OPA2134PA SM
Butterwor h LPF
with differen ial i/p
Fc=50K, Av=1
RIGHT DAC
5
6
7
Z20B
OPA2134PA SM
Gain of -2 for HDCD
O herwise -1
Signal phase is preserved at o/p
SCART R
NRESET
MD
MC
ML8716
LRCK_DAC_L
AD_DAC_L
BCK_DAC_L
CK256FS_DAC_L
LRCK_DAC_R
AD_DAC_R
BCK_DAC_R
CK256FS_DAC_R
MC
MD
8
4
Z20C
OPA2134PA SM
8
4
Z19C
OPA2134PA SM
+12VA
-12VA
ML_8716_R
NRESET
EMC
1
N
F
SK6A
PHONO4G
N
F
SK6B
PHONO4G
left_out
right_out
left_out
right_out
RLY2A
RLY DPDT SM
RLY2B
RLY DPDT SM
Q_30
QPAD
Q_31
QPAD
Q_32
QPAD
GAIN
High for HDCD
DACs operate in mono differen ial mode
Control is via SPI bus
Different LOAD signals are required because 1 is configured as LEFT
and one as RIGHT
2nd DAC board has its own LOAD signal
because DACs there are in stereo mode
DAC
LRCK_DAC_R
AD_DAC_R
BCK DAC R
CK256FS_DAC_R
R5
1K 0805
R6
1K 0805
R37
10K 0805
R38
10K 0805
R19
1K 0805
R20
1K 0805
R101
75R 0805
R102
75R 0805
R84
22K 0805
R86
12K 0805
R85
12K 0805
R83
22K 0805
R88
22K 0805
R87
22K 0805
R90
12K 0805
R89
12K 0805
R92
3K3 0805
R91
3K3 0805
R94
3K3 0805
R93
3K3 0805
R95
2K2 0805
R96
2K2 0805
R97
2K2 0805
R98
2K2 0805
R99
2K2 0805
R100
2K2 0805
+ C76
10U EL SG
+ C79
10U EL SG
C61
10N 0805
C62
10N 0805
+ C141
10U SILMIC
+ C142
10U SILMIC
+ C78
10U EL SG
+ C81
10U EL SG
C70
1N0 PP
C72
1N0 PP
C69
1N0 PP
C73
1N0 PP
C64
1N 0805
C63
1N 0805
C65
1N 0805
C66
1N 0805
+ C15
22U EL
+ C16
22U EL
-12VA
C147
1N 0805
C148
1N 0805
C149
1N 0805
+12VA
+5V_DAC_L
Switch is ON for HDCD
+
C90
100U CERAFINE
+
C91
100U CERAFINE
C128
47P NPO 0805
C129
47P NPO 0805
C50
1N 0805
L16
7F004
OPGND
EMCGND
R82
10R 0805
00_1072
R112
10K 0805
NF
SEL1
1
S2
14
D1
2
V+
13
S1
3
S3
11
V-
4
GND
5
VL 12
S4
6
D3
10
D4
7
SEL3 9
D2
15
SEL4
8
SEL2
16
Z11
DG413DY
00_1136
PG
24/11/00 Issue 3 PCB with 8740 DACs
3.0
R123
22K 0805
R124
22K 0805
R125
22K 0805
R126
22K 0805
MPORTANT NOTE:
Issue 3 board uses WM8740 DACs
Issue 2 and earlier use WM8716 DACs
Also, values of R83,R84,R87,R88 are different
LRCIN
1
DIN
2
BCKIN
3
MODE8X
4
SCLK
5
DIFFHW
6
DGND
7
DVDD
8
AVDDR
9
AGND2R
10
VMIDR
11
VOUTRN
12
VOUTRP
13
AGND1
14
Vcc
15
VOUTLP
16
VOUTLN
17
VMIDL
18
AGND2L 19
AVDDL
20
ZERO
21
RST 22
CS/IWO
23
MODE
24
MUTE
25
MD/DM0
26
MC/DM1
27
ML/IIS
28
WM8740
Z17
WM8740
LRCIN
1
DIN
2
BCKIN
3
MODE8X
4
SCLK
5
DIFFHW
6
DGND
7
DVDD
8
AVDDR
9
AGND2R
10
VMIDR
11
VOUTRN
12
VOUTRP
13
AGND1
14
Vcc
15
VOUTLP 16
VOUTLN
17
VMIDL
18
AGND2L
19
AVDDL
20
ZERO
21
RST
22
CS/IWO
23
MODE 24
MUTE
25
MD/DM0
26
MC/DM1
27
ML/IIS
28
WM8740
Z18
WM8740
01_1000
PG
02/01/01 Change R9,R10 from 100R to 22R
3.1
01_1047
PG
15-03-01 Diodes changed from 3B22D to 3BS1D
3.2
PG
13/11/01 C155 changed to 100R
3.3
02_E000
PG
07/01/02 Admin change - cap voltages corrected on BOM
3.3A
Содержание DiVA DV88
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