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參數(shù)資料
| 型號(hào)： | ICS8430252CG-45LFT |
| 英文描述： | FEMTOCLOCKS⑩ CRYSTAL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER |
| 中文描述： | FEMTOCLOCKS⑩晶體至3.3的LVPECL頻率合成器 |
| 文件頁(yè)數(shù)： | 10/13頁(yè) |
| 文件大?。?/td> | 169K |
| 代理商： | ICS8430252CG-45LFT |
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8430252CG-45
www.icst.com/products/hiperclocks.html
REV. B DECEMBER 9, 2005
10
Integrated
Circuit
Systems, Inc.
ICS8430252-45
F
EMTO
C
LOCKS
C
RYSTAL
-
TO
-3.3V LVPECL
F
REQUENCY
S
YNTHESIZER
PRELIMINARY
3. Calculations and Equations.
The purpose of this section is to derive the power dissipated into the load.
LVPECL output driver circuit and termination are shown in
Figure 4.
T
o calculate worst case power dissipation into the load, use the following equations which assume a 50
Ω
load, and a termination
voltage of V
CC
- 2V.
For logic high, V
OUT
= V
OH_MAX
=
V
CC_MAX
– 0.9V
(V
CCO_MAX
- V
OH_MAX
) =
0.9V
For logic low, V
OUT
= V
OL_MAX
=
V
CC_MAX
– 1.7V
(V
CCO_MAX
- V
OL_MAX
) =
1.7V
Pd_H is power dissipation when the output drives high.
Pd_L is the power dissipation when the output drives low.
Pd_H = [(V
– (V
- 2V))/R
[(2V - 0.9V)/50
Ω
] * 0.9V =
19.8mW
L
] * (V
CC_MAX
- V
OH_MAX
) = [(2V - (V
CC_MAX
- V
OH_MAX
))/R
L
] * (V
CC_MAX
- V
OH_MAX
) =
Pd_L = [(V
OL_MAX
– (V
CC_MAX
- 2V))/R
[(2V - 1.7V)/50
Ω
] * 1.7V =
10.2mW
L
] * (V
CC_MAX
- V
OL_MAX
) = [(2V - (V
CC_MAX
- V
OL_MAX
))/R
L
] * (V
CC_MAX
- V
OL_MAX
) =
Total Power Dissipation per output pair = Pd_H + Pd_L =
30mW
F
IGURE
4. LVPECL D
RIVER
C
IRCUIT
AND
T
ERMINATION
Q1
V
OUT
V
CC
RL
50
V
CC
- 2V
相關(guān)PDF資料 |
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| ICS8430252CG-45T | FEMTOCLOCKS⑩ CRYSTAL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER |
| ICS843031 | FEMTOCLOCKS⑩ CRYSTAL-TO-3.3V LVPECL CLOCK GENERATOR |
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| ICS843031AGT | CABLE ASSEMBLY; BANANA PLUG TO BANANA PLUG; 50 OHM, RG316/U COAX; 72" CABLE LENGTH |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ICS8430252CG-45T | 制造商:ICS 制造商全稱:ICS 功能描述:FEMTOCLOCKS⑩ CRYSTAL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER |
| ICS843031 | 制造商:ICS 制造商全稱:ICS 功能描述:FEMTOCLOCKS⑩ CRYSTAL-TO-3.3V LVPECL CLOCK GENERATOR |
| ICS843031-01 | 制造商:IDT 制造商全稱:Integrated Device Technology 功能描述:FEMTOCLOCKS⑩ CRYSTAL-TO- 3.3V, 2.5V LVPECL CLOCK GENERATOR |
| ICS843031AG | 制造商:ICS 制造商全稱:ICS 功能描述:FEMTOCLOCKS⑩ CRYSTAL-TO-3.3V LVPECL CLOCK GENERATOR |
| ICS843031AG-01 | 制造商:IDT 制造商全稱:Integrated Device Technology 功能描述:FEMTOCLOCKS⑩ CRYSTAL-TO- 3.3V, 2.5V LVPECL CLOCK GENERATOR |
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