參數資料
型號: ICS843002-31
英文描述: 700MHZ FEMTOCLOCKS⑩ VCXO BASED FREQUENCY TRANSLATOR AND JITTER ATTENUATOR
中文描述: ⑩VCXO的700MHz的FEMTOCLOCKS基于頻率轉換和抖動衰減器
文件頁數: 24/27頁
文件大小: 274K
代理商: ICS843002-31
843002CY-31
www.icst.com/products/hiperclocks.html
REV. B NOVEMBER 22, 2005
24
Integrated
Circuit
Systems, Inc.
ICS843002-31
700MH
Z
F
EMTO
C
LOCKS
VCXO B
ASED
F
REQUENCY
T
RANSLATOR
AND
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 8.
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
8. LVPECL D
RIVER
C
IRCUIT
AND
T
ERMINATION
Q1
V
OUT
V
CCO
RL
50
V
CCO
- 2V
相關PDF資料
PDF描述
ICS843002CY31 700MHZ FEMTOCLOCKS⑩ VCXO BASED FREQUENCY TRANSLATOR AND JITTER ATTENUATOR
ICS843002CY-31 700MHZ FEMTOCLOCKS⑩ VCXO BASED FREQUENCY TRANSLATOR AND JITTER ATTENUATOR
ICS843002CY-31LF 700MHZ FEMTOCLOCKS⑩ VCXO BASED FREQUENCY TRANSLATOR AND JITTER ATTENUATOR
ICS843002CY-31LFT 700MHZ FEMTOCLOCKS⑩ VCXO BASED FREQUENCY TRANSLATOR AND JITTER ATTENUATOR
ICS843002CY-31T 700MHZ FEMTOCLOCKS⑩ VCXO BASED FREQUENCY TRANSLATOR AND JITTER ATTENUATOR
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