参数资料
型号: ICS84329BM-01
厂商: INTEGRATED DEVICE TECHNOLOGY INC
元件分类: 时钟产生/分配
英文描述: 700 MHz, OTHER CLOCK GENERATOR, PDSO28
封装: 7.50 X 18.05 MM, 2.25 MM HEIGHT, MS-013, MO-119, SOIC-28
文件页数: 6/19页
文件大小: 268K
代理商: ICS84329BM-01
84329BM-01
www.icst.com/products/hiperclocks.html
REV. A JUNE 10, 2005
14
Integrated
Circuit
Systems, Inc.
ICS84329B-01
700MHZ, LOW JITTER, CRYSTAL-TO-3.3V
DIFFERENTIAL LVPECL FREQUENCY SYNTHESIZER
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 the
Figure 7.
To 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
CC_MAX
- V
OH_MAX
) = 0.9V
For logic low, V
OUT
= V
OL_MAX
= V
CC_MAX
– 1.7V
(V
CC_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
CC_MAX
- 2V))/R
L
] * (V
CC_MAX
- V
OH_MAX
) = [(2V - (V
CC_MAX
- V
OH_MAX
))/R
L
] * (V
CC_MAX
- V
OH_MAX
) =
[(2V - 0.9V)/50
Ω] * 0.9V = 19.8mW
Pd_L = [(V
OL_MAX
– (V
CC_MAX
- 2V))/R
L
] * (V
CC_MAX
- V
OL_MAX
) = [(2V - (V
CC_MAX
- V
OL_MAX
))/R
L
] * (V
CC_MAX
- V
OL_MAX
) =
[(2V - 1.7V)/50
Ω] * 1.7V = 10.2mW
Total Power Dissipation per output pair = Pd_H + Pd_L = 30mW
FIGURE 7. LVPECL DRIVER CIRCUIT AND TERMINATION
Q1
V
OUT
V
CC
RL
50
V
CC - 2V
相关PDF资料
PDF描述
ICS84329BM-01T 700 MHz, OTHER CLOCK GENERATOR, PDSO28
ICS84329BV-01 700 MHz, OTHER CLOCK GENERATOR, PQCC28
ICS84329BM-01LF 700 MHz, OTHER CLOCK GENERATOR, PDSO28
ICS84329BM-01T 700 MHz, OTHER CLOCK GENERATOR, PDSO28
ICS84329BV-01LF 700 MHz, OTHER CLOCK GENERATOR, PQCC28
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ICS84329BV-01 制造商:Integrated Device Technology Inc 功能描述:IC SYNTHESIZER 700MHZ 28-PLCC