參數(shù)資料
型號(hào): 8N3Q001EG-204LCDI8
廠商: IDT, Integrated Device Technology Inc
文件頁(yè)數(shù): 7/21頁(yè)
文件大?。?/td> 0K
描述: IC CLCK OSC QUAD FREQUENCY 5X7
特色產(chǎn)品: Fourth-generation FemtoClock for VCXO
標(biāo)準(zhǔn)包裝: 1
系列: FemtoClock® NG
類(lèi)型: 時(shí)鐘振蕩器
頻率: 可調(diào)節(jié)/可選擇
電源電壓: 2.375 V ~ 3.465 V
電流 - 電源: 150mA
工作溫度: -40°C ~ 85°C
封裝/外殼: 10-CLCC
包裝: 標(biāo)準(zhǔn)包裝
供應(yīng)商設(shè)備封裝: 10-CLCC
安裝類(lèi)型: 表面貼裝
其它名稱(chēng): 800-2571-6
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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