6
dc1485af
DEMO MANUAL DC1485A
SCHEMATIC DIAGRAM
5
5
4
4
3
3
2
2
1
1
D
D
C
C
B
B
A
A
2.
7V
V
in
5V
N
O
T
E
S
:
U
N
L
E
S
S
OTHERW
ISE SPECIFIED
RE
F
RE
G
P
A
R
A
L
L
E
L
IN
TERFACE
1.
AL
L
RE
S
IS
T
O
R
S
ARE
I
N
O
H
M
S
, 0402.
AL
L
CAP
ACI
T
O
RS
ARE
I
N
M
ICRO
F
A
RADS
, 0402.
2.
IN
S
T
A
LL S
H
U
N
TS
ON
J
U
MP
E
R
S
A
S
S
H
OW
N
.
EXT
1
0
0
0
S0
0
1
1
1
1
0
0
1
0
-2
.5
7
.5
0
0-
5
5
1
M
A
NUAL
S
P
A
N CO
NT
RO
L
-2
.5
2
.5
0
0
0
1
-1
0
1
0
0
0
5
0
1
S1
S2
0
1
SPA
N
2
DC1485A-
2 * LTC
27
57
C
L
X
W
ed
n
es
d
ay
, Ju
ly
29,
2009
11
KIM
T
.
LEO
C
.
18
-B
IT
P
A
R
A
L
L
E
L
I
N
P
U
T
, CURRE
NT
O
U
T
P
UT
DAC W
IT
H
RE
ADBACK
A
SC
H
E
MA
T
IC
SI
Z
E
DAT
E
:
DW
G
N
O
.
R
E
V
SH
EE
T
O
F
TITLE
:
CO
NT
RAC
T
N
O
.
A
PPR
O
V
A
L
S
DRAW
N
:
CHECKED:
APPRO
V
E
D
:
ENG
INE
E
R
:
DESIGN
E
R
:
T
E
CHNO
L
O
G
Y
F
ax:
(4
08)
434-
050
7
M
ilp
it
as
, C
A
95035
P
h
o
n
e:
(4
08)
432-
1900
1630 M
cCart
h
y B
lv
d
.
LTC
C
o
nf
ide
n
ti
al
-For
C
u
st
om
er
U
se
Only
CUS
TOME
R NOTI
CE
L
INEAR T
E
CHNOL
OGY HAS M
A
DE A BEST
EF
FO
R
T
TO
D
E
S
IG
N
A
CIRCUIT
T
H
AT
M
EET
S CUST
OM
ER-SUPPL
IED SPECI
FI
C
A
TI
O
N
S
;
HO
W
EVER, IT REM
A
INS THE CUSTO
M
ER'
S
R
E
S
P
O
N
S
IB
IL
IT
Y
T
O
VERIF
Y PROPER AND REL
IABL
E
OPERAT
ION I
N
T
H
E
A
C
TU
A
L
APPL
ICAT
ION. COM
P
ONENT
SUBST
IT
U
T
ION AN
D
P
R
IN
TE
D
CIRUIT
BOARD L
A
YOUT
M
A
Y SIGNIF
ICANT
L
Y
AF
F
E
CT
CIRCUIT
PERF
O
RM
ANCE OR REL
IABIL
IT
Y. CONT
ACT
L
IN
E
A
R
T
E
C
H
N
O
L
O
G
Y
A
P
P
L
IC
A
T
IO
N
S
E
N
G
IN
EERING F
O
R ASSIST
ANCE.
T
H
IS CIRCUIT
IS PROPRIET
ARY T
O
L
INEAR T
E
C
H
N
O
LO
G
Y
A
N
D
S
U
P
P
L
IE
D
F
O
R
U
S
E
W
IT
H
L
IN
E
A
R
T
E
CHNOL
OGY
PART
S.
VR
EF
RE
A
D
D1
D11
D15
D13
D10
G
D17
D17
D4
D8
D6
D3
D14
S0
MSPA
N
D8
D12
CL
R_
D14
VR
EF
VO
U
T
D5
D12
D6
UP
D
D13
CL
R_
WR
_
D2
RE
A
D
MSPA
N
D7
D16
D7
D0
D1
D15
D11
G
D0
D2
D10
D9
D_/
S
S2
D4
D16
S1
D9
UP
D
D_/
S
WR
_
S0
D3
D5
S1
S1
MSPA
N
S0
G
G
S2
S2
G
G
G
G
V+
V+
5V
V+
+5V
V-
V-
VC
C
+5V
5V
+5V
VC
C
V-
V+
VC
C
-5
V
VC
C
V+
V-
VC
C
-5
V
-5
V
C20 100p
F
1206
U8
L
T
12
36ACS
8-
5
1
2
3
4
5
6
7
8
NC
VI
N
NC
GN
D
T
R
IM
VO
U
T
NC
NC
C41 10u
F
,2
5V
1206
C37 1u
F
0603
25V
E5
AM
P
V
-
E1
VO
U
T
R23
100
R8 1K 0603
SD
I
C3 0.
1u
F
R4
100
JP
2
HD2X
3-
079
1
3
5
6 4 2
R26 10K
R28 20K
C14 1u
F
1206
U12
74
V
HC595M
T
C
10
8
14
11
12
16
13
15
1
2
3
4
5
6
7
9
SC
L
R
GN
D
SER
SC
K
RCK
VC
C
G
QA
QB
QC
QD
QE
QF
QG
QH
Q'
H
U6
L
T
C
6655AHM
S
8-
5
1
2
3
4
5
6
7
8
S
HDN
VI
N
GN
D
GN
D
G
N
D
VO
U
T
_
S
VO
U
T
_
F
GN
D
JP
5
EXT
GN
D
1
3 2
E9
RV
O
S
U10
74
V
HC595M
T
C
10
8
14
11
12
16
13
15
1
2
3
4
5
6
7
9
SC
L
R
GN
D
SER
SC
K
RCK
VC
C
G
QA
QB
QC
QD
QE
QF
QG
QH
Q'
H
R9
100
R6 4.
02K
0603
C2 0.
1u
F
C23 100
p
F
R27 4.
99K
C17 100
p
F
U9
74
V
HC595M
T
C
10
8
14
11
12
16
13
15
1
2
3
4
5
6
7
9
SC
L
R
GN
D
SER
SC
K
RCK
VC
C
G
QA
QB
QC
QD
QE
QF
QG
QH
Q'
H
R2
10K
0603
C10 0.
1u
F
R5 10 0603
D2
BAT
54
C
1
3
2
U13
NC7S
Z
14
P
5X
2
4
5
3
E2
GN
D
C36 10u
F
,2
5V
1206
JP
4
EXT
GN
D
1
3 2
C5 100p
F
1206
C1 0.
1u
F
C29 0.
1u
F
C19 0.
1u
F
R1 10K 0603
C8 0.
1u
F
C11 0.
1u
F
U16
L
T
1964E
S
5-
5
4
5
1
2
3
SH
D
N
OU
T
GN
D
IN
BY
P
C38 0.
01u
F
E6
VR
EF
R17
4.
99K
R29 4.99K
SD
O
R21
100
R31 10K
C31
0.
1u
F
C7 0.
1u
F
C33 0.
1u
F
P1
HD2X
20-
10
0
7
12
2
1 3 5
11
9
6
4
10
8
13 15
14 16
17 19 21 23 25 27 29 31 33 35 37 39
18 20 22 24 26 28 30 32 34 36 38 40
C13 10u
F
,2
5V
1206
D1
BAT
54
C
1
3
2
JP
3
HD2X
3-
079
1 3 5
6
4
2
+
-
U5
LT1
36
0C
S
8
2
3
6
7
4
C21
1206
OP
T
C6 0.
1u
F
C35
0.
01u
F
+
-
U4
L
T
C
6240CS
5
3
4
1
5
2
J1
H
D
2X
7-
079-
M
O
L
E
X
7
9
1 2
6 4
10
5
11 12 14
3
13
8
MOS
I/S
D
A
EESD
A
V+ 5V
CS
SC
K
/SC
L
EEVC
C
MISO
EESC
L
EEG
N
D
AUX
GND
GND
GND
C9 1u
F
0805
R20
100
C34 1u
F
0603
25V
U11
74
V
HC595M
T
C
10
8
14
11
12
16
13
15
1
2
3
4
5
6
7
9
SC
L
R
GN
D
SER
SC
K
RCK
VC
C
G
QA
QB
QC
QD
QE
QF
QG
QH
Q'
H
C28 100
p
F
C4 0.
1u
F
E8
R
E
F
ADJ
R16
4.
99K
C30
10u
F
,2
5V
1206
JP
1
HD2X
3-
079
1
3
5
6 4 2
CS
/
R7 1K 0603
R30 4.99K
C16
0603
OP
T
U1
LTC
27
57
C
L
X
12 13 14
10 11
39
17
15 16 23 24
33
34
36
35
1
25 26 27 28 29 30 31
3
38 37
6
40
2
21
18
19
48
47
46
45
43
44
42
41
5
4
20
7
22
32
9
8
D13 D12 D11
D15 D14
RV
O
S
VDD
D10 D9 D8 D7
D_/S
READ
WR_
UPD
RINS
D6 D5 D4 D3 D2 D1 D0
S2 S1 S0
IOU
T
2
F
IOU
T
1
RINF
MSPAN
GND
GND
REF
ADJ
RCOM
REF
F
REF
S
ROF
SF
ROF
SS
RFBS
RFBF
IOU
T
2
S
GN
D
/IOU
T
3
CLR_
GND
NC
NC
D16
D17
C40 0.
1u
F
E7
VC
C
CL
K
+
-
U3
L
T
C
2054CS
5
3
4
1
5
2
E4
GN
D
C12 0.
1u
F
U14 24L
C025-
I /
S
T
5
8
1
2
3
4
7
6
SD
A
VC
C
A0
A1
A2
VSS
WP
SC
L
D5
BAT
54
C
1
3
2
R22
100
R3
1K
0603
C25 0.
1u
F
E3
AM
P
V
+
R24 10K
U15
L
T
1761E
S
5-
5
4
5
1
2
3
BY
P
OU
T
VI
N
GN
D
SH
D
N
C39 10u
F
,2
5V
1206
R25 10K
C15
0603
OP
T
J2
OP
T
C18 10u
F
,2
5V
1206
R18
4.
99K
R11
4.
99K
+
-
U2
L
T
10
12ACS
8
2
3
6
7
4
R
19
4.
99K
Summary of Contents for DC1485A
Page 7: ...7 dc1485af DEMO MANUAL DC1485A ASSEMBLY DRAWINGS ...
Page 8: ...8 dc1485af DEMO MANUAL DC1485A ASSEMBLY DRAWINGS ...
Page 11: ...11 dc1485af DEMO MANUAL DC1485A PCB LAYOUT AND FILM Layer 4 Bottom Layer Bottom Solder Mask ...
Page 12: ...12 dc1485af DEMO MANUAL DC1485A PCB LAYOUT AND FILM Bottom Solder Paste Bottom Silkscreen ...