Linear Technology DC1846A, Demo Manual

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7
dc1846af
DEMO MANUAL DC1846A
SCHEMATIC DIAGRAM
1 1
2 2
3 3
4 4
5 5
6 6
7 7
8 8
A
A
B
B
C
C
D
D
3.3V GND
MUTE
VCO
2328 - 2536 MHz
ASSY
U3
*
-A
CVCO55CC-2328-2536
NOTE: UNLESS OTHERWISE SPECIFIED
1. ALL RESISTORS ARE IN OHMS, 0402 2. ALL CAPACITORS ARE IN MICROFARADS, 0402.
CS
SCLK
SDI
SDO
3.3V
3.3V
3.3V
3.3V
3.3V
5V
V+VCO
V+VCXO
3.3V
V+VCO
3.3V
5V
5V
V+OA
3.3V
REVISION HISTORY
DESCRIPTION
DATE
APPROVED
ECO
REV
MICHEL A.
PRODUCTION
2
01-28-14
__
REVISION HISTORY
DESCRIPTION
DATE
APPROVED
ECO
REV
MICHEL A.
PRODUCTION
2
01-28-14
__
REVISION HISTORY
DESCRIPTION
DATE
APPROVED
ECO
REV
MICHEL A.
PRODUCTION
2
01-28-14
__
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
2
01/28/2014, 12:25 PM
12
N/A
LTC6947IUFD
DEMO CIRCUIT 1846A
MICHEL A.
KIM T.
ULTRALOW NOISE AND SPURIOUS FRACTIONAL-N SYNTHESIZER
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
2
01/28/2014, 12:25 PM
12
N/A
LTC6947IUFD
DEMO CIRCUIT 1846A
MICHEL A.
KIM T.
ULTRALOW NOISE AND SPURIOUS FRACTIONAL-N SYNTHESIZER
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
2
01/28/2014, 12:25 PM
12
N/A
LTC6947IUFD
DEMO CIRCUIT 1846A
MICHEL A.
KIM T.
ULTRALOW NOISE AND SPURIOUS FRACTIONAL-N SYNTHESIZER
+
C16 330uF 7343 10V
+
C16 330uF 7343 10V
C3_F2 OPT 0603 C3_F2 OPT 0603
C3_F3 OPT 0603 C3_F3 OPT 0603
C18 1uF 0603 C18 1uF 0603
E18
EN
E18
EN
C15 1uF C15 1uF
C23 0.01uF C23 0.01uF
J12
GND
J12
GND
C31
1uF
0603
C31
1uF
0603
E12
CPGAIN
E12
CPGAIN
R16
0
0603
R16
0
0603
JP1JP1
R14
0
0603
R14
0
0603
C17 0.01uF C17 0.01uF
C8 1uF C8 1uF
J3
CP OPT
J3
CP OPT
R25 0 R25 0
RZ_P 21 0603 RZ_P 21 0603
+
C33 35V 47uF 7361
+
C33 35V 47uF 7361
J7
RF-
J7
RF-
E13
V+VCO
E13
V+VCO
C45 0.01uF C45 0.01uF
C2 0.1uF
35V 0805
C2 0.1uF
35V 0805
R1 4.99K R1 4.99K
L1_F3 OPT 0805 L1_F3 OPT 0805
R2_F3 OPT 0603 R2_F3 OPT 0603
J5
EXT VCO IN
J5
EXT VCO IN
CI2_A
OPT
1206
CI2_A
OPT
1206
J4
CPGAIN OPT
J4
CPGAIN OPT
C11 0.1uF C11 0.1uF
C12 1uF 0603 C12 1uF 0603
R29 0 R29 0
R2 4.99K R2 4.99K
C6
0.1uF
C6
0.1uF
E3
CP
E3
CP
J9
3.3V
J9
3.3V
R31 OPT 0603 R31 OPT 0603
R5 51.1 R5 51.1
C38 100pF C38 100pF
R30 0 R30 0
E15
V+VCXO
E15
V+VCXO
+
C1
35V
47uF 7361
+
C1
35V
47uF 7361
CP_A
OPT
0603
CP_A
OPT
0603
R23 OPT R23 OPT
C21
0.1uF
35V
0805
C21
0.1uF
35V
0805
D1
LN1251CTR
RED
D1
LN1251CTR
RED
2
1
C29 100pF C29 100pF
C4 0.1uF C4 0.1uF
C5 1uF 0603 C5 1uF 0603
CI2_P
OPT
1206
CI2_P
OPT
1206
A
B
U2
LT1678IS8
A
B
U2
LT1678IS8
OUTA
1
-INA
2
+INA
3
V-
4
+INB
5
-INB
6
OUTB
7
V+
8
C25 OPT C25 OPT
CI1_A
OPT
0603
CI1_A
OPT
0603
R27 0 R27 0
C30 0.1uF C30 0.1uF
E11
V+OA
E11
V+OA
CI1_P
1uF
0603
CI1_P
1uF
0603
C2_F1 33nF
0603
C2_F1 33nF
0603
R15 OPT
0603
R15 OPT
0603
E17
GND
E17
GND
J11
5V
J11
5V
U4
OPT
U4
OPT
VTUNE
1
EN
2
GND
3
RFOUT
4
NC
5
VCC
6
J6
RF+
J6
RF+
R24 OPT R24 OPT
L2 68nH
0402HPH-68NXJL
L2 68nH
0402HPH-68NXJL
U1 LTC6947IUFD
QFN28UFD-4X5
U1 LTC6947IUFD
QFN28UFD-4X5
STAT
2
VCO-
15
CS
3
MUTE
9
SDI
5
V+D
8
LDO
7
RF+
12
RF-
11
GND A
10
SCLK
4
VCO+
16
GNDB
17
V+RF
13
REF+
1
BB
14
SDO
6
GNDC
18
GNDD
19
GNDE
20
GNDF
21
GNDG
22
V+VCO
23
GND H
24
V+CP
25
CP
26
V+REF
27
REF-
28
GND
29
R13
OPT
0603
R13
OPT
0603
U3
*
U3
*
GND
1
VTUNE
2
GND
3
GND
4
GND
5
GND
6
GND
7
GND
8
GND
9
RFOUT
10
GND
11
GND
12
GND
13
VCC
14
GND
15
GND
16
C35 0.1uF
35V
0805
C35 0.1uF
35V
0805
C28 OPT C28 OPT
+
C3 330uF 7343 10V
+
C3 330uF 7343 10V
C34 0.01uF C34 0.01uF
L1_F1
0
0805
L1_F1
0
0805
E6
STATUS
E6
STATUS
L1_F2 OPT 0805 L1_F2 OPT 0805
C14 OPT 0603 C14 OPT 0603
J2
REF+
J2
REF+
E14
GND
E14
GND
L1 OPT L1 OPT
CP_P 47nF 0603 CP_P 47nF 0603
C26 100pF C26 100pF
+
C19 35V
47uF
7361
+
C19 35V
47uF
7361
L3 68nH
0402HPH-68NXJL
L3 68nH
0402HPH-68NXJL
R4 330 R4 330
+
C7 20V
47uF
7343
+
C7 20V
47uF
7343
RZ_A
OPT
0603
RZ_A
OPT
0603
J10
GND
J10
GND
C13 1uF 0603 C13 1uF 0603
R1_F1
21
0603
R1_F1
21
0603
R28 0 R28 0
E16
GND
E16
GND
C37 100pF C37 100pF
R2_F2
0
0603
R2_F2
0
0603