S1M8831A Samsung Semiconductor, Inc., S1M8831A Datasheet - Page 30

• Manufacturer Part Number: S1M8831A
• Description: Fractional-n Rf/integer-n If Dual Pll Frequency Synthesizer
• Manufacturer: Samsung Semiconductor, Inc.

S1M8831A/33
TYPICAL APPLICATION CIRCUIT
NOTE: The role of Rin: Rin makes a large portion of VCO output power go to the load rather than the PLL.
30
From
Controller
Reference
Input
<RF VCO Module: ALPS Part No>
. CDMA : UCVA4X103A
. K-PCS : UCVW4X102A
. US-PCS : UCVA3X120A
V
foLD
DD
The value of Rin depends on the VCO power level.
51
1000pF
10
11
12
CLCOK
OSCin
foLD
RF_EN
IF_EN
13
9
OSCx
DATA
14
8
RF Out
GND
LE
15
7
RF
100pF
IF Out
GND
f
10pF
in
16
6
RF
1000pF
IF
S1M8831A/33
VCO
f
f
56pF
in
in
17
5
RF
IF
R
10pF
56pF
in
DGND
VCO
f
C3
in
18
4
IF
R3
R
C13
in
C2
CP
DGND
19
3
FRACTIONAL-N RF/INTEGER-N IF DUAL PLL
O
R1
C1
RF
R13
C12
CP
V
P
20
2
RF
O
IF
R11
C11
V
100pF 0.01 F
P
V
OUT0
OUT1
V
V
DD
21
P
1
DD
100pF
RF
IF
IF
22
V
24
23
22
V
DD
100pF 0.01 F
P
100pF
0.1 F
0.1 F
0.01 F
22
V
DD
0.01 F