DC1684A - Schematic

5
4
3
2
1
REVISION HISTORY
ECO
V+
7
3
-
C23
4
VREFB
2
VC22
OPT.
1206
C24
100pF
VCC
37
38
*
*
46
45
ROFSA
ROFSA
V+
+
7
ROFSB
ROFSB
U11B
C27
R19
OPT
*
-
V2
4
U9
3
-
OPT.
1206
1206
U11A
U14
C41
0.1uF
8
*
1206
-
3
1206
+
3
VV-
4
4
9
V-
*
V+
-
V-
R27
R29
*
OUTA
TP12
GND
*
*
TP13
V-
*
C35
*
1206
R30
B
*
-5V
-5V
+
R28
U13
-
2
*
C34
OPT
U12
6
R26
*
V+
+
1
3
JP16
FBA
V+
*
1
*
-5V
R25
+5V
3
V+
GND
B
*
*
*
U11C
+5V
EXT
2
VOSADJA
C33
*
*
C32
R24
V-
TP14
1
JP12
R23
R22
5
VOSADJA
C40
0.1uF
1206
R21
*
2
V-
*
*
C
6
2
TP10
C29
V+
+
OUTB
TP9
GND
C28
*
*
100pF V+
2
6
4
GND
*
VOSADJA
2
EXT
GND
V-
R20
-5V
43
-
VR18
7
EXT
2
*
1
44
V+
R10
*
47
48
2
1
REFA
REFA
RCOMA
3
RINA
RINA
VOSADJA
*
+5V
1206
VOSADJB
+
U8
+
4
*
C26
5
3
C30
4
C39
0.1uF
*
1206
5
35
36
34
RCOMB
REFB
REFB
31
32
33
VREFA
3
2
3
C37
0.1uF
C38
0.1uF
42
*
R9
*
+5V
C36
0.1uF
41
-
C31
TP11
JP11
TP15
1206
7
C25
R8
R7
1
1
IOUT1A
GEADJA
VOSADJB
JP13
R6
DNC
JP9
VOSADJB
RINB
RINB
GEADJB
16
VDD
10K
R17
R15
R14
R16
10K
10K
R12
R13
21
JP8
15
3
S0
S1
S2
M-SPAN
5
6
MSPAN
1
3
23
24
25
22
JP6
JP7
6
40
39
3
RFBA
RFBA
GEADJA
1
2
C
CLR
LDAC
RFLAG
4
S2
3
2
S1
1
JP5
VOSADJB
IOUT2BF
IOUT2BS
IOUT2AF
IOUT2AS
2
2
3
U1 *
19
26
20
D
JP15
FBB
V+
RFBB
RFBB
IOUT1B
28
29
9
8
1
CS/LD
SCK
SDI
SRO
GND
GND
GND
GND
GND
GND
S0
3
11
13
12
14
GND
1
JP4
*
7
10
17
18
27
30
RFLAG#
3
2
LDAC#
1
JP3
10K
3
10K
1
2
CLR#
10K
2
1 0
10K
R11
VCC
CS#
SCK
MOSI
MISO
02-03-11
V-
3
D
DATE
MARK T.
7
EXT
GND
APPROVED
PRODUCTION
6
2
TP8
1
JP1
DESCRIPTION
2
V+
+
GEADJB
REV
__
U7 *
*
ASSY
-BIT
U1
U7, U14
U8, U12
U9,U13
U11
-A
18
LTC2758ACLX
LT1012ACS8
LT1360CS8
LTC2054HVCS5
LTC6244HVCDD
-B
16
LTC2752ACLX
LT1468CS8
LT1468CS8
OPT
OPT
S2 S1 S0
SPAN
0
0
0
0
5
0
0
1
0
10
0
1
0
-5
5
ASSY
R6
R7
R8
R9
R10
R18
R19
R20
R21
R22
R23
R24
R25
R26
R27
R28
R29
R30
0
1
1
-10
10
-A
1K
OPT
10K
10K
OPT
1K
OPT
4.02K
10
OPT
10K
4.02K
10
OPT
1K
1
0
0
-2.5
2.5
OPT
OPT
0
OPT
OPT
1K
OPT
OPT
0
1K
OPT
10K
OPT
1K
OPT
0
OPT
OPT
0
OPT
1
0
1
-2.5
7.5
ASSY
C24
C25
C26
C28
C30
C32
C33
C35
-A
100pF
1uF
1uF
OPT
100pF
1uF
1uF
OPT
-B
OPT
OPT
OPT
33pF
OPT
OPT
OPT
33pF
-B
OPT
CUSTOMER NOTICE
A
APPROVALS
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO
PCB DES.
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APP ENG.
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
NOTE: UNLESS OTHERWISE SPECIFIED
1. ALL RESISTORS ARE 0603.
ALL CAPACITORS ARE 0603.
2. INSTALL SHUNTS AS SHOWN.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
5
4
3
TECHNOLOGY
JW
MARK T.
2
VREFA
VREFB
VREFB
CS#
SCK
MOSI
MISO
CS#
SCK
MOSI
MISO
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
TITLE: SCHEMATIC
DUAL, SPI, IOUT, 18/16-BIT DAC
SIZE
N/A
SCALE = NONE
VREFA
DATE:
IC NO.
LTC2758/2ACLX
DEMO CIRCUIT 1684A
2/3/2011
REV.
2
SHEET 1
1
OF 2
A
5
4
3
2
1
MISO
MOSI
SCK
VREFA
C7
SCL
SDA
WP
A2
A1
A0
VIN
C3
10uF
1206
GND
VOUT
GND
TRIM
TP6
6
5
C2
10uF
1206
VREFB
5V
EXT
2
4
JP2
VREFB
6
5
7
3
2
1
1
V+
U4
24LC025-I /ST
TP3
C5
10uF
1206
2
1
AMPV-
C12
10uF
1206
C13
10uF
1206
C14
10uF
1206
C15
10uF
1206
IN
+5V
OUT
SHDN
GND
BYP
5
4
C10
C16
10uF
1206
C17
10uF
1206
C18
10uF
1206
C19
10uF
1206
4
TP5
2
SD
C21
GND
BYP
IN
OUT
3
5
0.01uF
U6
LT1964ES5-5
T2
R32
10.0K
R34
R33
TP7
10.0K
10.0K
CUSTOMER NOTICE
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
5
4
3
B
-5V
APPROVALS
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO PCB DES.
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APP ENG.
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
A
C20
10uF
1206
1
V-
R31
C11
10uF
1206
0.01uF
2
B
10.0K
+5V
2
3
TP4
C6
10uF
1206
D2
BAT54C
1
AMPV+
3
D3
BAT54C
TP16
TP2
REF
REG
C
U5
LT1761ES5-5
GND
T1
VCC VCC
1
JP10
VCC
3
8
4
VSS
VCC
C4
0.1uF
VREFB
1
2
R4
4.99K
GND
U3
OPT.
R5
4.99K
R3
4.99K
5V
EXT
2
6
3
OUTS
7
8
4
SD#
GND
2
R1
88.7K
OUTF
3
ADJ
VIN
GND
C1
10uF
1206
GND
JP14
VREFA
1
2
R2
10.0K
10
9
11
12
14
13
8
3
C
12V
1
BAT54C
CS#
SCK
MOSI
MISO
GND
GND
GND
EEVCC
EESDA
EESCL
EEGND
AUX
6
4
7
5
5
OUT
3
2
VREFA
3
CS
SCK/SCL
MOSI/SDA
MISO
1
2
BYP
IN
2
V+
5V
1
D1
1
5
V+
J1
HD2X7-079-MOLEX
D
U2
LTC6655CHMS8-5
0.1uF
3
4
U10
LT1761ES5-BYP
TP1
3
CS#
D
TECHNOLOGY
JW
MARK T.
TITLE: SCHEMATIC
DUAL, SPI, IOUT, 18/16-BIT DAC
SIZE
N/A
SCALE = NONE
2
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
DATE:
IC NO.
LTC2758/2ACLX
DEMO CIRCUIT 1684A
2/3/2011
REV.
2
SHEET 2
1
OF 2
A
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