參數(shù)資料
型號: MB15F83ULPFT
廠商: FUJITSU LTD
元件分類: XO, clock
英文描述: Fractional-N PLL Frequency Synthesizer
中文描述: PLL FREQUENCY SYNTHESIZER, 2000 MHz, PDSO20
封裝: PLASTIC, TSSOP-20
文件頁數(shù): 12/29頁
文件大?。?/td> 168K
代理商: MB15F83ULPFT
MB15F83UL
12
Phase Comparator Phase Switching Data Setting
FC
C
=
High
D
O
fr
>
fp
H
fr
=
fp
Z
fr < fp
L
Notes :
Z
=
High-Z
Depending upon the VCO and LPF polarity, FC bit should be set.
Charge pump current select Data Setting (CS
C
)
CS
C
Do current
±
6.0 mA
0
±
1.5 mA
Common setting
LD/fout Output Select Data Setting
LD/fout
FC bit Setting
When designing a synthesizer, the FC bit setting depends on the VCO and LPF characteristics.
FC
C
=
Low
D
O
L
Z
H
1
LDS
T1
0
T2
0
LD output
0
fout
output
fr
IF
1
fr
RF
1
1
0
fp
IF
1
0
1
fp
RF
1
1
1
(1)
(2)
High
Max.
When the LPF and VCO characteristics are similar to (1) ,
set FC bit “H”.
When the VCO characteristics are similar to (2) ,
set FC bit “L”.
VCO output
frequency
LPF output voltage
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