DC1705B - Schematic

5
4
3
2
1
REVISION HISTORY
ECO
REV
__
DESCRIPTION
REBUILD WITH CHANGE
1
3.3V
APPROVED
DATE
MICHEL A.
12-09-11
J6
3.3V
D
CP
2700pF
0603
C1
1uF
16V
0805
RZ
453
1%
0603
CI1
0.022uF
C2
+ 330uF
10V
7343
J7
D
GND
0603
CI2
6800pF
C7
0.01uF
C6
470pF
R1
51.1
1%
2
23
GNDD
24
CP
V+CP
26
25
CMc
SDI
GNDC
SDO
TB
TUNE
V+D
MUTE
3
GND
3.3V
*
ASSY
-A
-B
-C
U1
LTC6946IUFD-1
LTC6946IUFD-2
LTC6946IUFD-3
20
C16
2.2uF
19
16V
0805
18
17
16
15
TUNE
5%
0.1uF
C21
100pF
5%
J4
SMA-R
J5
SMA-R
RF-
RF+
CUSTOMER NOTICE
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.
VCO
2.24 TO 3.74 GHz
3.08 TO 4.91 GHz
3.84 TO 5.79 GHz
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
5
B
L2
3.3V
68nH
C22
0402HPH-68NXJL
C20
100pF
5%
A
22
21
C15
0.01uF
BB
L1
68nH
0402HPH-68NXJL
5%
1. ALL RESISTORS ARE IN OHMS, 0402
ALL CAPACITORS ARE IN MICROFARADS, 0402.
4
GND
C19
0.01uF
JP1
NOTE: UNLESS OTHERWISE SPECIFIED
J9
C18
1uF
16V
0805
3.3V
2
1
10V
7343
14
3.3V
3.3V
REF+
CMb
SCLK
C17
0.1uF
D1
LN1251C
B
8
CMa
V+RF
3.3V
GNDA
RF+
7
V+VCO
13
6
C10
+ 330uF
C
CS
12
SDI
SDO
1
R3
330
5
MUTE
STATUS
4
STAT
9
E3
CS
SCLK
*
REFO
RF-
3
SMA-R
U1
V+REFO
GNDB
2
11
1
V+REF
28
C14
0.022uF
J3
REF
OUT
27
REF-
C13
0.1uF
C9
1uF
16V
0805
C12
0.01uF
C11
470pF
3.3V
C
5V
C8 0805
1uF 16V
10
SMA-R
J8
GND
REF+
IN
5V
29
J1
0805
R4
15
3
TECHNOLOGY
KIM T.
MICHEL A.
TITLE: SCHEMATIC
ULTRALOW NOISE & SPURIOUS INTEGER-N
SYNTHESIZER WITH INTEGRATED VCO
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.
LTC6946IUFD-1/-2/-3
REV.
1
DEMO CIRCUIT 1705B
12/09/2011, 09:12 AM
SHEET
1
1
OF
2
A
5
4
3
2
DC590 SPI INTERFACE
3.3V
D
1
U2
NC7WZ17P6X
R5
200K
1
6
3
4
R10
100
R11 100
3.3V
GND
VCC
5
C23
SCLK
0.1uF
V+DIG CS SCLK SDI SDO
1
V+ 2
5V
6
CS 4
SCK/SCL 7
MOSI/SDA 5
MISO
10
EEVCC 9
EESDA 11
EESCL 12
EEGND 14
AUX
U3
NC7WZ17P6X
R9
4.99K
C26
0.1uF
WP
EEGND
3
4
2
GND
1
VCC(A)
2
GND
3
R15
0
0603
B
6
VCC
R12
100
3.3V
5
U4
74LVC1T45GW
4
SCL
SDA
WP
A2
A1
A0
ARRAY
13
8
3
6
5
7
3
2
1
1
SDI
C
C24
0.1uF
8
U5
24LC025-I /ST
C3
0.1uF
R7
200K
VCC
R8
4.99K
R6
200K
GND
R14
4.99K
GND
GND
GND
C
2
EEPROM
J2
HD2X7-079-MOLEX
D
CS
3.3V
VCC(B)
6
DIR
5
C25
0.1uF
4
SDO
B
R13
200K
NOTE: EEPROM FOR BOARD IDENTIFICATION
CUSTOMER NOTICE
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
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
5
4
3
TECHNOLOGY
KIM T.
MICHEL A.
TITLE: SCHEMATIC
A
ULTRALOW NOISE & SPURIOUS INTEGER-N
SYNTHESIZER WITH INTEGRATED VCO
SIZE
IC NO.
DATE:
REV.
LTC6946IUFD-1/-2/-3
N/A
SCALE = NONE
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
1
DEMO CIRCUIT 1705B
12/09/2011, 09:12 AM
SHEET
2
1
2
OF
2
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