参数资料
型号: TRF3761-EIRHARG4
厂商: TEXAS INSTRUMENTS INC
元件分类: PLL合成/DDS/VCOs
英文描述: PLL FREQUENCY SYNTHESIZER, 104 MHz, PQCC40
封装: GREEN, PLASTIC, MO-220VJJD-2, QFN-40
文件页数: 43/60页
文件大小: 1736K
代理商: TRF3761-EIRHARG4
C1=303pF
R1=8.87k
R2=3.4k
C2=1650pF
C3=330pF
W
Locktimefreq~250 S
m
Frequencyjumpfrom
1046MHzto1085MHz:
Loopfiltercomponents:
Loop Filter Design Example
OUT
F
=
F
= 2130MHz (rounded up)
min max
(17)
OUT
F
N =
= 5325
F com
(18)
3
= 2πF
= 125.66 x 10
c
v
(19)
1
- tan
cos
-6
T =
= 2.3 x 10
1
T3
1 +
c
T1
f
÷
f
è
v
÷
è
(20)
T
-6
3
T
=
T = 1 x 10
3
1
T1
÷
è
(21)
SLWS181J – OCTOBER 2005 – REVISED AUGUST 2008 ............................................................................................................................................... www.ti.com
Figure 88. Frequency Locktime
Given these parameters which were used for the lock time plot Figure 88:
F
min = 2085 MHz
F
max = 2175 MHz
F
com = 400 KHz
Icp = 4.2mA
Kvco = 23 MHz
Fc = 20 KHz
Phase Margin = 45 degrees
T3/T1 = 45%
Calculate FOUT of design
Next calculate N
Then calculate
ωc
Now calculate T1-T3 to give the RC time constants.
Use T1 to find T3
48
Copyright 2005–2008, Texas Instruments Incorporated
Product Folder Link(s): TRF3761
相关PDF资料
PDF描述
TRF3761-DIRHAT PLL FREQUENCY SYNTHESIZER, 104 MHz, PQCC40
TRF3761-HIRHARG4 PLL FREQUENCY SYNTHESIZER, 104 MHz, PQCC40
TRF3761-FIRHAT PLL FREQUENCY SYNTHESIZER, 104 MHz, PQCC40
TRF3761-BIRHAR PLL FREQUENCY SYNTHESIZER, 104 MHz, PQCC40
TRF3761-KIRHAT PLL FREQUENCY SYNTHESIZER, 104 MHz, PQCC40
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