参数资料
型号: SY88149HLMG
厂商: Micrel Inc
文件页数: 2/11页
文件大小: 0K
描述: POST AMP BURST GEPON/GPON 16MLF
特色产品: SY88149HL Limiting Post Amplifier
标准包装: 100
类型: 限幅后置放大器
应用: 光纤学网络
安装类型: 表面贴装
封装/外壳: 16-VFQFN 裸露焊盘,16-MLF?
供应商设备封装: 16-MLF?(3x3)
包装: 管件
其它名称: 576-3729-5
IDT / ICS HSTL FREQUENCY SYNTHESIZER
10
ICS8421002AGI-01 REV B
MARCH 02, 2009
ICS8421002I-01
FEMTOCLOCKS CRYSTAL-TO-HSTL FREQUENCY SYNTHESIZER
3. Calculations and Equations.
The purpose of this section is to derive the power dissipated into the load.
HSTL output driver circuit and termination are shown in
Figure 3.
To calculate worst case power dissipation into the load, use the following equations which assume a 50
load.
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
/R
L
) * (V
DD_MAX
- V
OH_MAX
)
Pd_L = (V
OL_MAX
/R
L
) * (V
DD_MAX
- V
OL_MAX
)
Pd_H = (1V/50
) * (2V - 1V) = 20mW
Pd_L = (0.4V/50
) * (2V - 0.4V) = 12.8mW
Total Power Dissipation per output pair = Pd_H + Pd_L = 32.8mW
FIGURE 3. HSTL DRIVER CIRCUIT AND TERMINATION
V
DDO
V
OUT
RL
50
Q1
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