参数资料
型号: CS5550-ISZR
厂商: Cirrus Logic Inc
文件页数: 2/15页
文件大小: 0K
描述: IC ADC 2CH LOW-COST 24-SSOP
标准包装: 1,000
位数: 24
采样率(每秒): 4k
数据接口: 串行
转换器数目: 2
功率耗散(最大): 30mW
电压电源: 模拟和数字
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 24-SSOP(0.209",5.30mm 宽)
供应商设备封装: 24-SSOP
包装: 带卷 (TR)
输入数目和类型: 2 个差分,双极
IDT / ICS HSTL FREQUENCY SYNTHESIZER
10
ICS8421002I REV B MARCH 02, 2009
ICS8421002I
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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