IDT / ICS 3.3V, 2.5V LVPECL CLOCK GENERAT" />
參數(shù)資料
型號(hào): CDB5381
廠商: Cirrus Logic Inc
文件頁(yè)數(shù): 3/16頁(yè)
文件大?。?/td> 0K
描述: BOARD EVAL FOR CS5381 192KHZ ADC
標(biāo)準(zhǔn)包裝: 1
ADC 的數(shù)量: 2
位數(shù): 24
采樣率(每秒): 192k
數(shù)據(jù)接口: 串行
輸入范圍: 6.1 Vpp
在以下條件下的電源(標(biāo)準(zhǔn)): 360mW @ 5V
工作溫度: -10°C ~ 70°C
已用 IC / 零件: CS5381
已供物品: 板,CD
產(chǎn)品目錄頁(yè)面: 755 (CN2011-ZH PDF)
相關(guān)產(chǎn)品: CS5381-KZZR-ND - IC ADC AUD 120DB 192KHZ 24-TSSOP
CS5381-KSZR-ND - IC ADC AUD 120DB 192KHZ 24-SOIC
598-1092-5-ND - IC ADC AUD 120DB 192KHZ 24-TSSOP
598-1091-5-ND - IC ADC AUD 120DB 192KHZ 24-SOIC
其它名稱: 598-1008
IDT / ICS 3.3V, 2.5V LVPECL CLOCK GENERATOR
11
ICS843031AG-01 REV. A NOVEMBER 11, 2008
ICS843031-01
FEMTOCLOCKS CRYSTAL-TO-3.3V, 2.5V LVPECL CLOCK GENERATOR
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 6.
To calculate worst case power dissipation into the load, use the following equations which assume a 50
Ω load, and a termination
voltage of V
CC
– 2V.
For logic high, V
OUT
= V
OH_MAX
= V
CC_MAX
– 0.9V
(V
CC_MAX
– V
OH_MAX
) = 0.9V
For logic low, V
OUT
= V
OL_MAX
= V
CC_MAX
– 1.7V
(V
CC_MAX
– V
OL_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 = [(V
OH_MAX
– (V
CC_MAX
– 2V))/R
L
] * (V
CC_MAX
– V
OH_MAX
) = [(2V – (V
CC_MAX
– V
OH_MAX
))/R
L
] * (V
CC_MAX
– V
OH_MAX
) =
[(2V – 0.9V)/50
Ω] * 0.9V = 19.8mW
Pd_L = [(V
OL_MAX
– (V
CC_MAX
– 2V))/R
L
] * (V
CC_MAX
– V
OL_MAX
) = [(2V – (V
CC_MAX
– V
OL_MAX
))/R
L
] * (V
CC_MAX
– V
OL_MAX
) =
[(2V – 1.7V)/50
Ω] * 1.7V = 10.2mW
Total Power Dissipation per output pair = Pd_H + Pd_L = 30mW
FIGURE 6. LVPECL DRIVER CIRCUIT AND TERMINATION
Q1
V
OUT
V
CC
RL
50
V
CC - 2V
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