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參數(shù)資料
| 型號： | X8037QCL |
| 廠商： | Abracon Corporation |
| 元件分類： | 振蕩器 |
| 英文描述： | 38-640MHz Low Phase Noise XO |
| 中文描述： | 38-640MHz低相位噪聲振蕩器 |
| 文件頁數(shù)： | 3/10頁 |
| 文件大?。?/td> | 224K |
| 代理商： | X8037QCL |
(Preliminary)
ABX8037/38/39
38-640MHz Low Phase Noise XO
30332 Esperanza., Rancho Santa Margarita, Ca 92688 Ph: 949-546-8000 Fax: 949-546-8001
www.Abracon.com
9/1/05 Page 3
FREQUENCY SELECTION TABLE
SEL2
SEL1
SEL0
Selected Multiplier/Output Frequency
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
VCO Max*
VCO Min*
Reserved
Reserved
Fin x 2
Fin x 8
Fin x 16
Fin x 4
All SEL pads have internal pull-ups (default value is ‘1’). Bond to GND to set to 0.
* Special Test Modes to help selecting the inductor value for the target output frequency.
PERFORMANCE TUNING & INDUCTOR VALUE SELECTION
Please refer to Abracon’s “Tuning Assistant” software to automatically calculate the optimum inductor values. In
addition, the chart below could be used as a reference for quick inductor value selection.
Use the special test modes “VCO Max” and “VCO Min” to determine the optimum inductor value. “VCO Max”
represents the high end of the VCO range and “VCO Min” represents the low end of the VCO range. The output
frequency in the “VCO Max” and “VCO Min” test modes is VCO/16. This means that the output frequencies are
around the crystal frequency that will be used. The optimum inductor value is where the target crystal frequency
is closest to the middle between the “VCO Max” and “VCO Min” output frequencies. In this case the VCO will lock
in the middle of its tuning range with maximum margin on either side.
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