参数资料
型号: 8N3Q001EG-203LCDI8
厂商: IDT, Integrated Device Technology Inc
文件页数: 7/21页
文件大小: 0K
描述: IC CLCK OSC QUAD FREQUENCY 5X7
特色产品: Fourth-generation FemtoClock for VCXO
标准包装: 1
系列: FemtoClock® NG
类型: 时钟振荡器
频率: 可调节/可选择
电源电压: 2.375 V ~ 3.465 V
电流 - 电源: 150mA
工作温度: -40°C ~ 85°C
封装/外壳: 10-CLCC
包装: 标准包装
供应商设备封装: 10-CLCC
安装类型: 表面贴装
其它名称: 800-2570-6
IDT8N3Q001 REV G Data Sheet
QUAD-FREQUENCY PROGRAMMABLE-XO
IDT8N3Q001GCD REVISION A MARCH 6, 2012
15
2012 Integrated Device Technology, Inc.
3. Calculations and Equations.
The purpose of this section is to calculate the power dissipation for the LVPECL output pair.
LVPECL output driver circuit and termination are shown in Figure 4.
Figure 4. LVPECL Driver Circuit and Termination
To calculate worst case power dissipation into the load, use the following equations which assume a 50 load, and a termination voltage of
VCC – 2V.
For logic high, VOUT = VOH_MAX = VCC_MAX – 0.8V
(VCC_MAX – VOH_MAX) = 0.8V
For logic low, VOUT = VOL_MAX = VCC_MAX – 1.5V
(VCC_MAX – VOL_MAX) = 1.5V
Pd_H is power dissipation when the output drives high.
Pd_L is the power dissipation when the output drives low.
Pd_H = [(VOH_MAX – (VCC_MAX – 2V))/RL] * (VCC_MAX – VOH_MAX) = [(2V – (VCC_MAX – VOH_MAX))/RL] * (VCC_MAX– VOH_MAX) =
[(2V – 0.8V)/50
] * 0.8V = 19.2mW
Pd_L = [(VOL_MAX – (VCC_MAX– 2V))/RL] * (VCC_MAX – VOL_MAX) = [(2V – (VCC_MAX – VOL_MAX))/RL] * (VCC_MAX– VOL_MAX) =
[(2V – 1.5V)/50
] * 1.5V = 15mW
Total Power Dissipation per output pair = Pd_H + Pd_L = 34.2mW
V
OUT
V
CC
V
CC - 2V
Q1
RL
50
Ω
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