- 9 -
SCHEMATIC DIAGRAM
UD-503
UD-503
1
2
3
4
5
6
7
8
A
B
C
D
E
Z
ANALOG PCB (2/5)
From PCB,AIN
13mA
13mA
0.25mA
FOR U505
Remove C540,C547,C651
AIN_LP
AIN_LN
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
N10V_L
P10V_L
GND
GND
GND
GND
N10V_L
GND
D3P3V
P10V_L
GND
GND
N10V_L
GND
P10V_L
GND
GND
P10V_L
N10V_L
P10V_L
GND
GND
GND
GND
GND
SDATA0
1
LRCK0
1
1
0
K
C
B
1
0
K
C
M
DAC_MC0
1
DAC_MDI0
1
DAC_MS0
1
N_DAC_RST0
1
VOL_CS0
1
SCKV0
1
SDOV0
1
LPA 4
LNA 4
P5V_L 1
AIN_L
1
+
-
V+
V-
U505A
MUSES8820E
3
2
1
8
4
R768
100(1/4W,3216)
R789
100(1/4W,3216)
+
C541
100u/25V (KMG)
+
C540
100u/25V (KMG)
C562
0.1u
R681
3.9k(F,2125)
R682
3.9k(F,2125)
C538
560p(ECHU)
C644
0.1u
R567
10K(F)
R558
1.5k(F,2125)
+
C561
100u/10V(TCFG)
U506
TL431IPK
2
3
1
C531
0.1u(1608)
+
C542
100u/25V(ME-AX)
R547
180
C539
560p(ECHU)
R566
18k(F)
+
C550
100u/25V(KMG)
C522
0.1U
U508
TL431IP
K
2
3
1
+
C521
47u/16V
R790
100(1/4W,3216)
R568
N.M.(0)
R524
47
+
C558
47u/16V
R569
100(1/4W,3216)
R548
180
+
-
U505B
MUSES8820E
5
6
7
+
C552
47u/16
V
R679
3.9k(F,2125)
+
C524
47u/16V
R517
47
P507
B5B-ZR
1
2
3
4
5
U507
NJW1195A
INA1
1
INA2
2
INA3
3
INA4
4
INB1
32
INB2
31
INB3
30
INB4
29
OUT1A
8
OUT1B
25
OUT2A
12
OUT2B
21
DCCAP1
A
6
DCCAP1
B
27
DCCAP2
A
10
DCCAP2
B
23
V+
18
V-
17
VDDOUT
13
GND0
5
GND1
7
GND2
9
GND3
11
GND4
24
GND5
26
GND6
28
ADR0
19
ADR1
20
DATA
14
CLOCK
15
LATCH
16
DIFF
22
C526
10u/6.3V (1608)
C673
0.1u
R549
180
C529
0.1u(ECHU
)
AK4490
U504
NC
1
PDN
2
BICK/DCLK/BCK
3
SDATA/DSDL/DINL
4
LRCK/DSDR/DINR
5
SSLOW/WCK
6
SMUTE/CSN
7
SD/CCLK/SCL
8
SLOW/CDTI/SDA
9
DIF0/DZFL/STO
10
DIF1/DZFR/TSTO
11
DIF2/CAD0
12
PSN
13
I2C
14
DEM0
15
DEM1
16
ACKS/CAD1
17
NC
18
VREFHR
19
VREFHR
20
VREFLR
21
VREFLR
22
VCMR
23
AUTRP
25
AUTRN
26
VDDR
27
VDDR
28
VSSR
29
VSSR
30
VSSL
31
VSSL
32
VDDL
33
VDDL
34
AOUTLN
35
AOUTLP
36
NC
37
VCML
38
VREFLL
39
VREFLL
40
VREFHL
41
VREFHL
42
NC
43
AVDD
44
AVSS
45
MCLK
46
DVSS
47
DVDD
48
NC
24
C533
0.1u(ECHU)
+
C530
100u/25V(ME-AX)
R546
180
R572
0
+
C553
100u/10V(TCFG)
C543
2700p/16V(ECHU)
R557
1.5k(F,2125)
R560
1.0k(F,2125)
C670
N.M(1608)
+
C536
47u/16V
+
C532
47u/16V
R556
1.0k(F,2125)
TP538
PAD
1
1
R570
10k(F)
R564
1.5k(F,2125)
+
C546
100u/25V(ME-AX)
R553
1.5k(F,2125)
R554
1.5k(F,2125)
C537
2700p/16V(ECHU)
R525
47
R563
1.5k(F,2125)
R555
1.0k(F,2125)
+
C557
100u/25V(KMG)
R559
1.5k(F,2125)
C560
0.1u(1608)
R551
47
+
C642
22u/16V
R518
47
C545
560p(ECHU)
+
C556
100u/25V(KMG)
R552
47
C551
0.1u(1608)
+
C643
22u/16V
R562
1.0k(F,2125)
TP502
PAD
+
C559
100u/25V(KMG
)
R571
18k(F)
U518
NJM7805DL1A
OUT
3
IN
1
GN
D
2
R561
1.5k(F,2125)
R680
3.9k(F,2125)
+
C534
100u/25V(ME-AX)
C523
0.1u(1608)
C544
560p(ECHU)
C527
0.1u(1608)
C535
0.1u(1608)
