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參數(shù)資料
| 型號(hào)： | ICS843101IAG-100T |
| 英文描述： | FEMTOCLOCKS⑩ CRYSTAL-TO-LVPECL 100MHZ FREQUENCY MARGINING SYNTHESIZER |
| 中文描述： | FEMTOCLOCKS⑩晶體到的LVPECL 100MHZ輸出頻率裕合成器 |
| 文件頁數(shù)： | 14/17頁 |
| 文件大?。?/td> | 243K |
| 代理商： | ICS843101IAG-100T |
843101AGI-100
www.icst.com/products/hiperclocks.html
REV. A OCTOBER 20, 2005
14
Integrated
Circuit
Systems, Inc.
ICS843101I-100
F
EMTO
C
LOCKS
C
RYSTAL
-
TO
-LVPECL
100MH
Z
F
REQUENCY
M
ARGINING
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 5.
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
Ω
] * 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
5. 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) |
參數(shù)描述 |
|---|---|
| ICS843-106 | 制造商:ICS 制造商全稱:ICS 功能描述:106.25MHZ, LVCMOS, LVPECL DUAL OUTPUT OSCILLATOR |
| ICS8431-11 | 制造商:ICS 制造商全稱:ICS 功能描述:255MHZ, LOW JITTER, LVPECL FREQUENCY SYNTHESIZER |
| ICS8431-21 | 制造商:ICS 制造商全稱:ICS 功能描述:350MHZ, LOW JITTER, CRYSTAL OSCILLATOR-TO-3.3V LVPECL FREQUENCY SYNTHESIZER |
| ICS84314 | 制造商:ICS 制造商全稱:ICS 功能描述:350MHZ, CRYSTAL-TO-3.3V/2.5V LVPECL FREQUENCY SYNTHESIZER W/FANOUT BUFFER |
| ICS84314-02 | 制造商:ICS 制造商全稱:ICS 功能描述:700MHZ, CRYSTAL-TO-3.3V/2.5V LVPECL FREQUENCY SYNTHESIZER W/FANOUT BUFFER |
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