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参数资料
| 型号： | LC72121 |
| 厂商： | SANYO SEMICONDUCTOR CO LTD |
| 元件分类： | PLL合成/DDS/VCOs |
| 英文描述： | PLL FREQUENCY SYNTHESIZER, 160 MHz, PDIP22 |
| 封装： | DIP-22 |
| 文件页数： | 7/23页 |
| 文件大小： | 377K |
| 代理商： | LC72121 |
Structure of the IF Counter
The LC72121 IF counter is a 20-bit binary counter, and takes the IF signal from the IFIN pin as its input. The result of
the count can be read out serially, MSB first, from the DO pin.
The IF frequency (Fc) is measured by determining how many pulses were input to the IF counter in the stipulated
measurement time, GT.
C
Fc =—— (C = Fc x GT)
C: Counted value (the number of pulses)
GT
No. 5815-15/23
LC72121, 72121M, 72121V
GT1
GT0
Measurement time
Measurement time (GT)
Wait time (tWU)
0
4 ms
3 to 4 ms
0
1
8
3 to 4 ms
1
0
32
7 to 8 ms
1
64
7 to 8 ms
IF Counter Frequency Measurement Examples
When the measurement time (GT) is 32 ms and the counted value (C) is 53980 (hexadecimal) or 342,400 (decimal).
IF frequency (FC) = 342400 ÷ 32 ms = 10.7 MHz
When the measurement time (GT) is 8 ms and the counted value (C) is E10 (hexadecimal) or 3600 (decimal).
IF frequency (FC) = 3600 ÷ 8 ms = 450 kHz
相关PDF资料 |
PDF描述 |
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| LC72121V | PLL FREQUENCY SYNTHESIZER, 160 MHz, PDSO24 |
| LC72121M | PLL FREQUENCY SYNTHESIZER, 160 MHz, PDSO24 |
| LC72131M | PLL FREQUENCY SYNTHESIZER, 40 MHz, PDSO20 |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LC72121_03 | 制造商:SANYO 制造商全称:Sanyo Semicon Device 功能描述:PLL Frequency Synthesizers for Electronic Tuning |
| LC72121-D-E | 制造商:ON Semiconductor 功能描述:PLL FREQUENCY SYNTHESIZER - Ammo Pack 制造商:ON Semiconductor 功能描述:PLL FREQ SYNTHESIZER 制造商:ON Semiconductor 功能描述:FNFLD / PLL FREQUENCY SYNTHESIZER |
| LC72121M | 制造商:SANYO 制造商全称:Sanyo Semicon Device 功能描述:PLL Frequency Synthesizers for Electronic Tuning |
| LC72121MA | 制造商:SANYO 制造商全称:Sanyo Semicon Device 功能描述:CMOS IC PLL Frequency Synthesizers for Electronic Tuning |
| LC72121MA-AH | 功能描述:时钟合成器/抖动清除器 RoHS:否 制造商:Skyworks Solutions, Inc. 输出端数量: 输出电平: 最大输出频率: 输入电平: 最大输入频率:6.1 GHz 电源电压-最大:3.3 V 电源电压-最小:2.7 V 封装 / 箱体:TSSOP-28 封装:Reel |
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