參數(shù)資料
型號(hào): MC145230
廠商: Motorola, Inc.
英文描述: Dual PLL Frequency Synthesizers With DACs and Voltage Multipliers(帶DACs和電壓乘法器的雙PLL頻率合成器)
中文描述: 雙鎖相環(huán)頻率合成器與DAC和電壓倍增器(帶數(shù)模轉(zhuǎn)換器和電壓乘法器的雙鎖相環(huán)頻率合成器)
文件頁(yè)數(shù): 69/71頁(yè)
文件大小: 906K
代理商: MC145230
MC145225 MC145230
69
MOTOROLA RF/IF DEVICE DATA
9. APPLICATION CIRCUIT
MC145225
MC145230
Figure 65. Application Circuit
Low–pass
Filter
Secondary
VCO
Low–pass
Filter
O
25
26
27
28
29
30
31
32
16
15
14
13
12
11
10
9
General–purpose
(Open–drain)
Main
VCO
General–purpose
(Totem–pole)
General–purpose
(Three–state)
Note 4
DAC
Power
(Note 3)
Osce
1
DAC
Vpos DAC1 DAC2
2
3
Enb
5
Din
6
Clk
7
LD
Output B
Vpos
fout/Pol
fout/Pol
Vpos
fin
Gnd
Oscb
VposPDout
CregCmult
PDout–Lo
PDout–Hi
Gnd
Rx
Output A
Output C
Gnd
Gnd
fin
fin
Vpos
Mode
4
8
24
23
22
21
20
19
18
17
Vpos
Note 5
Vpos
2 k
Vpos
Vpos
NOTES:
1. R should be chosen to achieve the desired isolation. Use of a
capacitor in place of R is possible, but there is the possibility of
phase locking on VCO harmonics if they fall on the high–sensitivity
point of the fin or fin
input. This is because use of a capacitor in
place of R forms a high–pass filter.
2. Vpos may range from 1.8 to 3.6 V.
3. DAC power may be any potential between 1.8 V and 3.6 V.
4. Configurable pins. See Pin Descriptions.
5. Tie mode to Gnd or Vpos.
R
SMD
Note 1
50
SMD
0.1
μ
F X7R
0805 SMD or
Smaller
R
SMD
50
SMD
0.1
μ
F X7R
0805 SMD or Smaller
Note 1
MCU
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