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參數(shù)資料
| 型號： | ICS843002I-40 |
| 英文描述： | 175MHZ, FEMTOCLOCKS-TM VCXO BASED SONET/SDH JITTER ATTENUATOR |
| 中文描述： | 175MHz時，F(xiàn)EMTOCLOCKS，商標(biāo)VCXO的基于SONET / SDH的抖動衰減器 |
| 文件頁數(shù)： | 18/21頁 |
| 文件大小： | 277K |
| 代理商： | ICS843002I-40 |
843002AKI-40
www.icst.com/products/hiperclocks.html
REV. A JUNE 22, 2005
18
Integrated
Circuit
Systems, Inc.
ICS843002I-40
175MH
Z
, F
EMTO
C
LOCKS
VCXO B
ASED
SONET/SDH J
ITTER
A
TTENUATOR
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 7.
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
CCO
- 2V.
For logic high, V
OUT
= V
OH_MAX
=
V
CCO_MAX
– 0.9V
(V
CCO_MAX
- V
OH_MAX
) =
0.9V
For logic low, V
OUT
= V
OL_MAX
=
V
CCO_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
OH_MAX
– (V
CCO_MAX
- 2V))/R
[(2V - 0.9V)/50
Ω
) * 0.9V =
19.8mW
L
] * (V
CCO_MAX
- V
OH_MAX
) = [(2V - (V
CCO_MAX
- V
OH_MAX
))/R
L
] * (V
CCO_MAX
- V
OH_MAX
) =
Pd_L = [(V
OL_MAX
– (V
CCO_MAX
- 2V))/R
[(2V - 1.7V)/50
) * 1.7V =
10.2mW
L
] * (V
CCO_MAX
- V
OL_MAX
) = [(2V - (V
CCO_MAX
- V
OL_MAX
))/R
L
] * (V
CCO_MAX
- V
OL_MAX
) =
Total Power Dissipation per output pair = Pd_H + Pd_L =
30mW
F
IGURE
7. LVPECL D
RIVER
C
IRCUIT
AND
T
ERMINATION
Q1
V
OUT
V
CCO
RL
50
V
CCO
- 2V
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| ICS843002I-41 | 制造商:ICS 制造商全稱:ICS 功能描述:700MHz, FEMTOCLOCKS-TM VCXO BASED SONET/SDH JITTER ATTENUATOR |
| ICS843002I-72 | 制造商:IDT 制造商全稱:Integrated Device Technology 功能描述:FEMTOCLOCKS⑩ VCXO BASED WCDMA CLOCK GENERATOR/JITTER ATTENUATOR |
| ICS843003 | 制造商:ICS 制造商全稱:ICS 功能描述:FEMTOCLOCKS CRYSTAL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER |
| ICS843003AG | 制造商:ICSI 制造商全稱:Integrated Circuit Solution Inc 功能描述:FEMTOCLOCKS CRYSTAL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER |
| ICS843003AGI-01 | 制造商:ICS 制造商全稱:ICS 功能描述:FEMTOCLOCKS-TM CRYSTAL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER |
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