8
dc1705cfa
DEMO MANUAL DC1705C
schematic Diagram
5
5
4
4
3
3
2
2
1
1
D
D
C
C
B
B
A
A
VCO
2.24 TO 3.74 GHz
3.08 TO 4.91 GHz
3.84 TO 5.79 GHz
ASSY
U1
*
-A
LTC6946IUFD-1
-B
LTC6946IUFD-2
-C
LTC6946IUFD-3
NOTE: UNLESS OTHERWISE SPECIFIED
1. ALL RESISTORS ARE IN OHMS, 0402
ALL CAPACITORS ARE IN MICROFARADS, 0402.
3.3V
5V
3.3V
3.3V
3.3V
3.3V
3.3V
3.3V
CS
SCLK
SDO
SDI
REVISION HISTORY
DESCRIPTION
DATE
APPROVED
ECO
REV
MICHEL A.
REBUILD WITH CHANGE
__
1
01-22-13
REVISION HISTORY
DESCRIPTION
DATE
APPROVED
ECO
REV
MICHEL A.
REBUILD WITH CHANGE
__
1
01-22-13
REVISION HISTORY
DESCRIPTION
DATE
APPROVED
ECO
REV
MICHEL A.
REBUILD WITH CHANGE
__
1
01-22-13
SIZE
DATE:
IC NO.
REV.
SHEET
OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY
Fax: (408)434-0507
Milpitas, CA 95035 Phone: (408)432-1900
1630 McCarthy Blvd.
LTC Confidential-For Customer Use Only
CUSTOMER NOTICE
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
SCALE = NONE
www.linear.com
1
DEMO CIRCUIT 1705C
01/22/2013, 12:44 PM
12
ULTRALOW NOISE & SPURIOUS INTEGER-N
N/A
LTC6946IUFD-1/-2/-3
KIM T.
MICHEL A.
SYNTHESIZER WITH INTEGRATED VCO
SIZE
DATE:
IC NO.
REV.
SHEET
OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY
Fax: (408)434-0507
Milpitas, CA 95035 Phone: (408)432-1900
1630 McCarthy Blvd.
LTC Confidential-For Customer Use Only
CUSTOMER NOTICE
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
SCALE = NONE
www.linear.com
1
DEMO CIRCUIT 1705C
01/22/2013, 12:44 PM
12
ULTRALOW NOISE & SPURIOUS INTEGER-N
N/A
LTC6946IUFD-1/-2/-3
KIM T.
MICHEL A.
SYNTHESIZER WITH INTEGRATED VCO
SIZE
DATE:
IC NO.
REV.
SHEET
OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY
Fax: (408)434-0507
Milpitas, CA 95035 Phone: (408)432-1900
1630 McCarthy Blvd.
LTC Confidential-For Customer Use Only
CUSTOMER NOTICE
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
SCALE = NONE
www.linear.com
1
DEMO CIRCUIT 1705C
01/22/2013, 12:44 PM
12
ULTRALOW NOISE & SPURIOUS INTEGER-N
N/A
LTC6946IUFD-1/-2/-3
KIM T.
MICHEL A.
SYNTHESIZER WITH INTEGRATED VCO
C6 1uF
C6 1uF
L2
68nH
0402HPH-68NXJL
5%
L2
68nH
0402HPH-68NXJL
5%
C12 0.01uF
C12 0.01uF
C8 1uF
16V
0805
C8 1uF
16V
0805
J3
SMA-R
REF
OUT
J3
SMA-R
REF
OUT
JP1
GND
3.3V
MUTE
JP1
GND
3.3V
MUTE
1
3
2
C20 100pF 5%
C20 100pF 5%
J1
SMA-R
REF+
IN
J1
SMA-R
REF+
IN
+
C2 330uF 10V 7343
+
C2 330uF 10V 7343
C9 1uF 16V 0805
C9 1uF 16V 0805
C16 2.2uF
16V 0805
C16 2.2uF
16V 0805
L1
68nH
0402HPH-68NXJL
5%
L1
68nH
0402HPH-68NXJL
5%
J5 SMA-R
RF+
J5 SMA-R
RF+
J7
GND
J7
GND
C21
100pF
5%
C21
100pF
5%
R3 330
R3 330
J9
GND
J9
GND
J8
5V
J8
5V
C22
0.1uF
C22
0.1uF
TUNETUNE
C13 0.1uF
C13 0.1uF
J6
3.3V
J6
3.3V
E3
STATUS
E3
STATUS
R4 15
R4 15
C19 0.01uF
C19 0.01uF
U1
*
U1
*
REFO
2
TUNE
15
STAT
3
MUTE
9
SCLK
5
V+D
8
SDO
7
RF+
12
RF-
11
GNDB
10
CS
4
TB
16
GNDC
17
V+RF
13
V+REFO
1
BB
14
SDI
6
CMc
18
CMb
19
CMa
20
GNDA
21
V+VCO
22
GNDD
23
V+CP
24
CP
25
V+R
EF
26
RE
F+
27
RE
F-
28
GND
29
C7
0.01uF
C7
0.01uF
CI2
6800pF
0805
CI2
6800pF
0805
CP
2700pF
0603
CP
2700pF
0603
C15
0.01uF
C15
0.01uF
C14
0.022uF
C14
0.022uF
J4
SMA-R
RF-
J4
SMA-R
RF-
CI1
0.022uF
0603
CI1
0.022uF
0603
R1 51.1 1%
R1 51.1 1%
C17 0.1uF
C17 0.1uF
+
C10 330uF 10V 7343
+
C10 330uF 10V 7343
D1 SML-010VT RED
D1 SML-010VT RED
2
1
C11 1uF
C11 1uF
C18 1uF 16V 0805
C18 1uF 16V 0805
RZ 453 1% 0603
RZ 453 1% 0603
C1 1uF 16V 0805
C1 1uF 16V 0805
