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參數(shù)資料
| 型號： | ICS843004 |
| 英文描述： | FEMTOCLOCKS⑩ LVCMOS/CRYSTAL-TO- 3.3V LVPECL FREQUENCY SYNTHESIZER |
| 中文描述： | FEMTOCLOCKS⑩LVCMOS/CRYSTAL-TO- 3.3 LVPECL的頻率合成器 |
| 文件頁數(shù)： | 12/16頁 |
| 文件大?。?/td> | 299K |
| 代理商： | ICS843004 |
843004AG
www.icst.com/products/hiperclocks.html
REV. A NOVEMBER 18, 2004
12
Integrated
Circuit
Systems, Inc.
ICS843004
F
EMTO
C
LOCKS
LVCMOS/C
RYSTAL
-
TO
-
3.3V LVPECL F
REQUENCY
S
YNTHESIZER
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 5.
T
o calculate worst case power dissipation into the load, use the following equations which assume a 50
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
] * 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
] * 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
5. LVPECL D
RIVER
C
IRCUIT
AND
T
ERMINATION
Q1
V
OUT
V
CC
RL
50
V
CC
- 2V
相關PDF資料 |
PDF描述 |
|---|---|
| ICS843004AG | FEMTOCLOCKS⑩ LVCMOS/CRYSTAL-TO- 3.3V LVPECL FREQUENCY SYNTHESIZER |
| ICS843004AGT | FEMTOCLOCKS⑩ LVCMOS/CRYSTAL-TO- 3.3V LVPECL FREQUENCY SYNTHESIZER |
| ICS843011C | FEMTOCLOCKS-TM CRYSTAL-TO- 3.3V LVPECL CLOCK GENERATOR |
| ICS843011CG | FEMTOCLOCKS-TM CRYSTAL-TO- 3.3V LVPECL CLOCK GENERATOR |
| ICS843011CGLF | FEMTOCLOCKS-TM CRYSTAL-TO- 3.3V LVPECL CLOCK GENERATOR |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| ICS843004-01 | 制造商:ICS 制造商全稱:ICS 功能描述:FEMTOCLOCKS-TM CRYSTAL-TO- 3.3V LVPECL FREQUENCY SYNTHESIZER |
| ICS843004-02 | 制造商:ICS 制造商全稱:ICS 功能描述:CRYSTAL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER |
| ICS843004-125 | 制造商:IDT 制造商全稱:Integrated Device Technology 功能描述:FemtoClock? Crystal-to-3.3V LVPECL Frequency Synthesizer |
| ICS843004A01 | 制造商:ICS 制造商全稱:ICS 功能描述:FEMTOCLOCKS-TM CRYSTAL-TO- 3.3V LVPECL FREQUENCY SYNTHESIZER |
| ICS843004A02 | 制造商:ICS 制造商全稱:ICS 功能描述:CRYSTAL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER |
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