Advertisement
Audio outputs are inverted so as to be compatible with
DV88. This is compenstaed for in software by setting a
register in the DAC to invert the signal
+5VA
C500
C506
C507
C508
10UF
100N
100N
100N
35V
50V
50V
50V
SGET
0805
0805
0805
DGND
+3V3A
+3V3_DAC1
L500
C502
120R@100MHz
C514
DAC
10UF
100N
35V
50V
SGET
0805
DGND
IC502
ALRCLK_DAC1
1
17
ALRCLK_DAC1
LRCKIN
VOUTL+
ADAT_DAC1
2
ADAT_DAC1
DIN
ABCLK_DAC1
3
16
ABCLK_DAC1
BCKIN
VOUTL-
MCLK_DAC1
5
MCLK_DAC1
SCLK
12
VOUTR+
13
VOUTR-
MD
26
MD
MD/DM0
MC
27
MC
MC/DM1
ML_8740_1
28
18
P531
ML_8740_1
ML/I2S
VMIDL
+3V3_DAC1
23
11
CSBIOW
VMIDR
24
MODE
4
MODE8X
6
DIFFHW
25
MUTEB
RESET*
22
RESET*
RSTB
21
ZERO
DGND
XWM8740EDS
SSOP-28
DGND
ALL PARTS ON THIS SHEET ARE NOT FITTED FOR DV75
FILTER
2nd order Bessel filter, Av=1
R500
R508
P507
680R
C520
3K3
C522
R502
C526
0W125
2N2
3K3
680P
0W125
0805
47P
100V
0W125
100V
0805
100V
FKP2
0805
FKP2
0805
DGND
R501
R509
P508
680R
3K3
C523
0W125
0W125
2N2
0805
100V
0805
FKP2
DGND
C503
C504
C515
C512
C516
C513
10UF
100N
100N
10UF
100N
100N
35V
35V
50V
100V
50V
100V
SGET
SGET
0805
MKS2
0805
MKS2
DGND
+12VA
C501
10UF
35V
SGET
DGND
2nd order Bessel filter, Av=1
R504
R510
P520
P521
680R
C521
3K3
C524
R506
C528
0W125
0W125
2N2
3K3
680P
0805
47P
100V
0W125
100V
0805
100V
FKP2
0805
FKP2
0805
DGND
P519
R505
R511
680R
3K3
C525
0W125
0W125
2N2
0805
0805
100V
FKP2
DGND
C505
DGND
10UF
35V
SGET
-12VA
OUTPUT BUFFER
Gain of -1.1
Cheapo version could have bipolar op-amp, but without feedback round coupling cap
IC500B
5
R512
P513
P514
7
6
10K
OPA2134UA
0W125
SO-8
0805
C527
680P
100V
FKP2
R503
3K3
0W125
0805
C509
100N
50V
0805
IC500A
3
R514
P525
P526
1
2
10K
OPA2134UA
0W125
SO-8
0805
C529
680P
DGND
100V
FKP2
R507
3K3
0W125
0805
C517
100N
50V
0805
ITEM500
DRAWING TITLE
A & R Cambridge Ltd.
Pembroke Avenue
Waterbeach
Cambridge CB5 9QR
+12VA
R516
11K
0W125
0805
-12VA
C530
R518
P518
33P
1M0
100V
0W125
0805
0805
IC501B
C532
6
R520
R521
P515
7
5
47R
47R
OPA2134UA
100UF
0W125
0W125
DGND
SO-8
16V
0805
0805
NONP
R513
47K
0W125
0805
DGND
RLY500B
DGND
NEC
EB2-5NU
CENTRE
CENTRE_OUT
CENTRE_OUT
From sheet 6
SUB_OUT
SUB_OUT
SUB
C534
C535
470P
470P
0805
100V
100V
R525
OUT_GND4
0805
0R0
C536
DGND
0805
1N0
100V
0805
+12VA
R517
11K
+12VA
0W125
0805
C510
100N
-12VA
50V
0805
C531
R519
P530
33P
1M0
DGND
100V
0W125
IC501A
0805
0805
C533
2
P527
R522
R523
1
3
47R
47R
OPA2134UA
100UF
0W125
0W125
DGND
SO-8
16V
0805
0805
NONP
C511
R515
100N
47K
50V
0W125
0805
0805
-12VA
DGND
RLY500A
DGND
NEC
EB2-5NU
1
E828AP
Pad Damping 7.5x6x3MM Rubber
DV79 MAIN DAC LS & RS AUDIO
Filename:
L974C5.Sch
Notes:
04_E142
PG
04_E129
PG
ECO No.
INITIALS
Contact Engineer:
Peter Gaggs
Contact Tel:
(01223) 203270
Printed:
23-Sep-2004
D500
BAT54S
SOT-23
R524
LS_OUT
0R0
0805
LEFT SURR
SKT500
KUNMING GOLD
RIGHT SURR
C519
C518
470P 100V
470P
0805
100V
R527
OUT_GND3
0805
0R0
C537
DGND
0805
1N0
100V
0805
EMC_GND
D501
BAT54S
SOT-23
R526
RS_OUT
0R0 0W125
0805
Fit on top of RLY500
23-09-04
Correct BOM error - R320 now fitted
1.1
24-08-04
Production release
1.0
DATE
DESCRIPTION OF CHANGE
ISSUE
L974C5
Sheet
5
of
11
A2
DRAWING NO.
Advertisement
