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8-1
MAIN BOARD
TABLE OF CONTENTS
Internal IC Diagram ..........................................................8-1
Circuit Diagram (Top Left) ................................................ 8-4
Circuit Diagram (Top Right) .............................................. 8-5
Circuit Diagram (Bottom Left) ........................................... 8-6
Circuit Diagram (Bottom Right) ........................................ 8-7
PCB Layout Top View ....................................................... 8-8
PCB Layout Bottom View ................................................. 8-9
Parts List ..........................................................................8-10
STA308 INTERNAL IC DIAGRAM
SA
SCL SDA
LRCKI
2
I
C
BICKI
SE R I A L
SD I12
DA T A
SD I34
IN
SYSTEM
SDI56
CONTRO L
SDI78
VARI ABLE
CHAN NEL
OVER-
MAPPING
SAMPLING
(BIQUA D S )
SYSTEM TIMING
PLLB
PLL
PO WER
DOWN
XTI
C KOUT
P WDN
STA505 INTERNAL IC DIAGRAM
IN1A
29
M3
IN1A
IBIAS
23
+3.3V
24
CONFIG
PWRDN
25
M2
PWRDN
PROTECTIONS
R57
R59
FAULT
27
&
10K
10K
LOGIC
26
TRI-STATE
C58
M5
100nF
TH_WAR
28
TH_WAR
IN1B
30
IN1B
M4
V DD
21
V DD
22
V SS
33
REGULATORS
V SS
34
M17
C58
C53
SIGN
100nF
100nF
V CC
35
C60
SIGN
100nF
V CC
36
M15
IN2A
31
IN2A
GND-Reg
20
GND-Clean
19
M16
IN2B
32
IN2B
GNDSUB
M14
1
8-1
M VO
OVER SAM PLING
DDX
TREBLE,
VOLUME
BASS , EQ
LIMITING
S ERIAL
DA T A
OUT
VARIABL E
DO WN -
SAMPLING
EAPD
1A
V CC
15
C30
1 F
L18 22 H
17
OUT1A
C20
16
100nF
OUT1A
C52
C99
14
GND1A
330pF
R98
100nF
6
C23
1B
12
V CC
470nF
R63
R100
C101
C31
20
6
100nF
11
1 F
C21
OUT1B
100nF
10
L19 22 H
OUT1B
13
GND1B
2A
7
V CC
C32
1 F
L113 22 H
8
OUT2A
C110
9
100nF
OUT2A
C109
C107
6
GND2A
R103
330pF
100nF
6
2B
C108
4
V CC
470nF
R104
R102
C106
20
6
C33
100nF
3
1 F
C111
OUT2B
100nF
2
L112 22 H
OUT2B
5
GND2B
OUT1A/B
OUT2A/ B
OUT3A/ B
OUT 4A/B
OUT 5A/B
OU T6 A/B
OUT 7 A/B
OUT8A/B
L RCKO
BICKO
SDO 12
SDO3 4
SDO56
SDO78
+V CC
C55
1000 F
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