HMC833LP6G 查看數據表（PDF） - Hittite Microwave
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HMC833LP6G Datasheet PDF : 61 Pages
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7-9
HMC833LP6GE
v03.714
FRACTIONAL-N PLL WITH INTEGRATED VCO
25 - 6000 MHz
Figure 19. RF Output Return Loss
0
-5
-10
-15
-20
-25
-30
-35
25
100
1000
FREQUENCY (MHz)
10000
Figure 20. Worst Spur, Tunable Reference,
Output Frequency = 2000.1 MHz [10]
0
-20
-40
-60
-80
-100
-120
-140
-160
-180
0.1
1
10
100
1000
10000 100000
OFFSET (kHz)
Figure 21. Low Frequency Performance [11]
-50
-60
-70
-80
Fixed 50 MHz Reference
Tunable Reference
-90
-100
-110
-120
2GHz +1kHz
2GHz +10kHz
2GHz +100kHz 2GHz +1000kHz
OUTPUT FREQUENCY
2GHz +10000kHz
Loop Filter Configuration Table
Figure 22. Low Frequency Performance [12]
-120
-130
-140
Carrier Frequency = 25 MHz
Carrier Frequency = 55.55 MHz
Carrier Frequency = 100 MHz
-150
-160
-170
0.1
1
10
100
1000
10000 100000
OFFSET (kHz)
Loop Filter
BW (kHz)
C1
(pF)
C2
(nF)
C3
(pF)
C4
(pF)
R2
(kΩ)
R3
(kΩ)
R4
(kΩ)
Loop Filter Design
74
150
27
220 220 0.82
1
1
90
270
3.9
56
56
1.2
1
1
200
56
1.8
N/A
N/A
2.2
0
0
[10] Capability of HMC830LP6GE to generate low frequencies (as low as 25 MHz), enables the HMC830LP6GE to be used as a tunable reference
source into the HMC833LP6GE, which maximizes spur performance of the HMC833LP6GE. Please see “HMC833LP6GE Application
Information” for more information.
[11] The graph is generated by observing, and plotting, the magnitude of only the worst spur (largest magnitude), at any offset, at each output
frequency, while using a fixed 50 MHz reference and a tunable reference tuned to 47.5 MHz. See “HMC833LP6GE Application Information” for
more details.
[12] Phase noise performance of the HMC833LP6GE when used as a tunable reference source. HMC833LP6GE is operating at 6 GHz/30, 6
GHz/54 for the 100 MHz, 55.55 MHz curves respectively Loop Filter 56 pF//(2.2k ohm+1.8 nF) Integer Mode 100MHz Wenzel oscillator with
Rdiv=2 50MHz comparison frequency.
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