Linear Technology DC1880A, Демонстрационное руководство

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13
dc1880af
DEMO MANUAL DC1880A
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa-
tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.
schematic Diagram
NOTES: UNL
ESS OTHERWISE SPECIFIED
1. ALL RESISTORS ARE IN OHM
S, 0603.
ALL CAPACITORS ARE IN M
ICROFARADS, 0603.
TXEN
4
1
GAT
E4
2
SENSE-
4
3
CQ4
5
L+4
4
GAT
E3
7
CQ3
6
SENSE-
3
8
L+3
9
SENSE+
10
VDD
11
GAT
E2
12
SENSE-
2
13
L+2
14
CQ2
15
CQ1
16
GAT
E1
17
SENSE-
1
18
L+1
19
RXD1
20
TX
D1
21
TXEN
1
22
IRQ
23
SDO
24
RXD2
25
TX
D2
26
TXEN
2
27
VL
28
GND
29
GND
30
SDI
31
SCK
32
CS
33
RXD3
34
TX
D3
35
TXEN
3
36
RXD4
37
TX
D4
38
U1 LT
C2874I
FE
A
B
C
D
E
FG
H
A
BC
D
E
F
G
H
4 5 6 7 8 9
10
4 5 6 7 8 9
I
J
KL
I
J
KL
1 2 3
1 2 3
TIT
LE:
SCHEM
AT
IC
SIZE
IC NO.
REV.
DATE:
SHEET
OF
APPROVALS
SCALE = NONE
CUSTOMER NOTICE
M
on
da
y, O
ct
ob
er
2
8,
2
01
3
2
QUAD INDUSTRIAL BUS MASTER CONTROLLER
KEIT
H
B.
11
LTC2874IF
E
DEMO CIRCUIT 1880A
ECO
REV
APPROVED
DAT
E
REVISION HISTORY
DESCRIPTION
1630 M
cCarthy
Blv
d.
M
ilpitas, CA
95035
Phone: (408) 432-1900 Fax
: (408) 434-0507
www.li
near
.co
m
LTC
CONFIDENTIA
L
FO
R
C
U
ST
O
M
ER
USE
ONLY
THIS
CIRCUIT
IS
PROPRIETARY
TO
LINEAR
TECHNOLOGY
AND
SUPPLIED
FOR
USE
W
ITH LINEAR
TECHNOLOGY
PARTS.
LINEAR
TECHNO
LO
G
Y
HAS
MADE
A
BEST
EFFO
RT
TO
DESIGN
A
CIRCUIT
THAT
MEETS
CUSTOMER
-
SUPPLIED SPECIF
ICAT
IO
NS; HO
W
EVER, IT
REMAINS
THE
CUSTO
MERS
RESPO
NSIBILITY
TO
VERIFY
P
R
O
P
E
R
A
N
D
R
E
LI
A
B
LE
O
P
E
R
A
TI
O
N
IN
T
H
E
A
C
TU
A
L
APPLICAT
IO
N.
CO
MPO
N
ENT
SUBST
IT
UT
IO
N AND
PRINTED
CIRCUIT
LAY
O
UT
MAY
SIGNIFICANTLY
A
FF
E
C
T
C
IR
C
U
IT
P
E
R
FO
R
M
A
N
C
E
O
R
R
E
LIA
B
IL
IT
Y.
CO
NTACT
LINEAR
TECHNO
LO
G
Y
APPLICATIO
NS
ENG
INEERING
F
O
R ASSIST
ANCE.
TECHNOL
O
GY
PCB DES. APP ENG.
KEIT
H
B.
-
2
1ST
PROT
OT
YPE
KEIT
H
B.
9-17-12
N/A
J10
VDD
8V - 30V
LINE
OUT
Q2 FQT
7N
10
R27 0.2
080
5
R2 10
Q1 FQT
7N
10
R25 0.2
080
5
R1 10
Q4 FQT
7N
10
R26 0.2
080
5
R4 10
Q3 FQT
7N
10
R28 0.2
080
5
R3 10
J11
GND
2 4 6 8 10 12 14
13 11
9 7 5 3 1
J12 DC590
IRQ
IRQ
SDO
SDO
SDI
SDI
CS
SCK
SCK
CS
E1
4
VL
2.9V
- 5.5V
E1
5
GND
E1
6
VDD
R7 100
1206
VL E
XT
GND
E4
TXEN
3
R12 100 1206
VL
EXT
GND
JP10 TX
D1
DB9
R5 100
1206
VL E
XT
GND
E1
TXEN
4
R9 100
1206
VL E
XT
GND
E8
TXEN
2
R11 100 1206
VL E
XT
GND
E1
1
TXEN
1
E1
2
TX
D1
R10 100 1206
VL
EXT
GND
JP8 TX
D2
DB9
E9
TX
D2
R8 100 1206
VL
EXT
GND
JP4 TX
D3
DB9
E5
TX
D3
R6 100 1206
VL
EXT
GND
JP2 TX
D4
DB9
E2
TX
D4
R23 680
D13 IRQ RED
R22 4.99k
JP9 TXEN
1
JP7 TXEN
2
JP3 TXEN
3
JP1 TXEN
4
DCD DSR
RX
TX
GND
1 6 2 7 3 8 4 9 5
J9
RTS CTS DTR
TXn
JP6
TXn
R24 100 1206
E1
3
RXD1
E1
0
RXD2
E6
RXD3
E3
RXD4
C2
1u
F/
50
V
0805
C3 1u
F/
16
V
C4 1u
F/
16
V
C6 1u
F/
16
V
L1 10uH
C5
22
0n
F/
16
V
RIN
1
TOUT
2
VCC
3
VDD
4
SW
5
GND
6
CAP
7
VL
10
M
ODE
9
PS
8
TIN
11
ROU
T
12
VEE
13
U2 LT
C280
2
C8
4.7uF/16
V
3528
C9
10
0u
F/
63
V
D
IA
=1
2.
5m
m
LINE IN
D6 36V D8 36V D10 36V D12 36V
SCL
6
SDA
5
WP
7
A0
1
A1
2
A2
3
VCC
8
VSS
4
U4 24LC025
R15
4.99k
R14
4.99k
R13
4.99k
C7
0.1uF/25
V
VL
VL
VL
E7
GND
VL
VL
VL
VL VL VL VL TXn TXn TXn
VL
RXD4
RXD3
RXD2
RXD1
SDO SDI
SCK CS
1 2 3 4 5
J1
1 2 3 4 5
J2
1 2 3 4 5
J3
1 2 3 4 5
J4
L+1 I/Q1 L-1 C/Q1 NC1 L+2 I/Q2 L-2 C/Q2 NC2 L+3 I/Q3 L-3 C/Q3 NC3 L+4 I/Q4 L-4 C/Q4 NC4
1 5 3 2 4
J8
1 5 3 2 4
J7
1 5 3 2 4
J6
1 5 3 2 4
J5
E1
8 GND
E1
7
GND
C18 OPEN C19 OPEN C20 OPEN C21 OPEN
C10 OPEN
C11 OPEN
C12 OPEN
C13 OPEN
C14 OPEN
C15 OPEN
C16 OPEN
C17 OPEN
R29 OPEN R30 OPEN R31 OPEN R32 OPEN
I/Q1 L+1 NC1 C/Q1 L-1
JP13
GND - SHIELD
I/Q2 L+2 NC2 C/Q2 L-2 I/Q3 L+3 NC3 C/Q3 L-3 I/Q4 L+4 NC4 C/Q4 L-4
RXDn SELE
C
T
COM
PORT
COM
PORT
(DB9)
JP5
COM
PORT
ENABLE
C1
1u
F/
16
V
IN
13
SHDN
11
O
UT
4
ADJ
5
GND
6
U3 LT
301
2
JP12 L
D
O
ON
R18 10k
R16 100k
R17 75k
JP11
VL
SELE
C
T
R
20
59k R21 47.5k R19 309k
2.9V 3.3V 5.0V 5.5V
D5 36V D7 36V D9 36V D11 36V
D1 S100 D2 S100 D3 S100 D4 S100
IRQ