參數(shù)資料
型號： B900M24FXX16I
元件分類： 數(shù)字信號處理
英文描述： 0-BIT, 80 MHz, OTHER DSP, PQCC44
文件頁數(shù)： 97/100頁
文件大?。?/td> 1547K
代理商： B900M24FXX16I
96
Lucent Technologies Inc.
B900
Advance Data Sheet
Baseband Signal Processor
July 1999
9 Crystal Oscillator Electrical Requirements and Characteristics (continued)
9.2
Frequency Accuracy Considerations (continued)
Typical capacitance variation of oscillator circuit in the B900 itself across process, temperature, and supply voltage
is ±1 pF. Thus, the expected frequency variation due to the B900 is:
(1 pF)(3.4 ppm/pF) = 3.4 ppm
Other frequency accuracy considerations include the following:
s
Approximate variation in parasitic capacitance of crystal = ±0.5 pF
s
Frequency shift due to variation in CO = (0.5 pF)(3.4 ppm/pF) = 1.7 ppm
s
Approximate variation in parasitic capacitance of printed-circuit board = ±1.5 pF
s
Frequency shift due to variation in board capacitance = (1.5 pF)(3.4 ppm/pF) = 5.1 ppm
Therefore, the contributions to frequency variation add up as follows:
Initial Tolerance of Crystal = 10.0 ppm
Temperature Tolerance of Crystal = 25.0 ppm
Aging Tolerance of Crystal = 6.0 ppm
Load Capacitor Variation = 2.8 ppm
B900 Circuit Variation = 3.4 ppm
CO Variation = 1.7 ppm
Board Variation = 5.1 ppm
Total = 54.0 ppm
This type of detailed analysis should be performed for any crystal-based application where frequency accuracy is
critical.
相關(guān)PDF資料
PDF描述
BU-61582F2-121 2 CHANNEL(S), 1M bps, MIL-STD-1553 CONTROLLER, CDFP70
BU-61580F6-10 2 CHANNEL(S), 1M bps, MIL-STD-1553 CONTROLLER, CDFP70
BU-61580V5-30 2 CHANNEL(S), 1M bps, MIL-STD-1553 CONTROLLER, CDFP70
BU-61585G2-12 2 CHANNEL(S), 1M bps, MIL-STD-1553 CONTROLLER, CDSO70
BU-61585G5-10 2 CHANNEL(S), 1M bps, MIL-STD-1553 CONTROLLER, CDSO70
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
B901 制造商:EDAL 制造商全稱:EDAL 功能描述:Silicon Bridge Rectifier
B901 10.0MM 制造商:DORMER TOOLS 功能描述:M/C REAMER B901 10.0MM
B901 4.0MM 制造商:DORMER TOOLS 功能描述:M/C REAMER B901 4.0MM
B901 5.0MM 制造商:DORMER TOOLS 功能描述:M/C REAMER B901 5.0MM
B901 8.0MM 制造商:DORMER TOOLS 功能描述:M/C REAMER B901 8.0MM
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