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參數(shù)資料
型號: ICS83PR226BKI-01LFT
廠商: IDT, Integrated Device Technology Inc
文件頁數(shù): 10/23頁
文件大?。?/td> 0K
描述: IC SYNTHESIZER PROGR 10-VFQFPN
標準包裝: 2,500
系列: HiPerClockS™, FemtoClock™
類型: 時鐘/頻率合成器
PLL:
輸入: 晶體
輸出: LVPECL
電路數(shù): 1
比率 - 輸入:輸出: 1:1
差分 - 輸入:輸出: 無/是
頻率 - 最大: 213.33MHz
除法器/乘法器: 是/無
電源電壓: 2.375 V ~ 3.465 V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 10-VQFN 裸露焊盤
供應(yīng)商設(shè)備封裝: 10-VFQFPN(5x7)
包裝: 帶卷 (TR)
其它名稱: 83PR226BKI-01LFT
ICS83PR226BKI-01 REVISION B AUGUST 10, 2010
18
2010 Integrated Device Technology, Inc.
ICS83PR226I-01 Data Sheet
PROGRAMMABLE FEMTOCLOCK LVPECL OSCILLATOR REPLACEMENT
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 Figure 7.
Figure 7. 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 – 0.9V
(VCC_MAX – VOH_MAX) = 0.9V
For logic low, VOUT = VOL_MAX = VCO_MAX – 1.7V
(VCC_MAX – VOL_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 = [(VOH_MAX – (VCC_MAX – 2V))/RL] * (VCC_MAX – VOH_MAX) = [(2V – (VCC_MAX – VOH_MAX))/RL] * (VCC_MAX – VOH_MAX) =
[(2V – 0.9V)/50
] * 0.9V = 19.8mW
Pd_L = [(VOL_MAX – (VCC_MAX – 2V))/RL] * (VCC_MAX – VOL_MAX) = [(2V – (VCC_MAX – VOL_MAX))/RL] * (VCC_MAX – VOL_MAX) =
[(2V – 1.7V)/50
] * 1.7V = 10.2mW
Total Power Dissipation per output pair = Pd_H + Pd_L = 30mW
V
OUT
V
CC
V
CC - 2V
Q1
RL
50
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