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參數(shù)資料
| 型號： | LC72137 |
| 廠商： | Sanyo Electric Co.,Ltd. |
| 英文描述： | PLL Frequency Synthesizer for Electronic Tuning(用于電子調(diào)諧的鎖相環(huán)頻率合成器) |
| 中文描述： | 鎖相環(huán)頻率合成器電子調(diào)諧（用于電子調(diào)諧的鎖相環(huán)頻率合成器） |
| 文件頁數(shù)： | 15/22頁 |
| 文件大?。?/td> | 348K |
| 代理商： | LC72137 |
No. 5743-15/22
LC72137, 72137M
IF Counter Structure
The LC72137 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.
Fc =
(C = Fc
×
GT)
C: count value (number of pulses)
Sample IF Counter Frequency Calculations
1. For a measurement time (GT) of 32 ms and a count value (C) of 53980 (hexadecimal), which is 342,400 (decimal)
IF frequency (Fc) = 342,400 ÷ 32 ms = 10.7 MHz
2. For a measurement time (GT) of 8 ms and a count value (C) of E10 (hexadecimal), which is 3600 (decimal)
IF frequency (Fc) = 3600 ÷ 8 ms = 450 kHz
C
GT
GT1
GT0
Measurement time
Measurement period (GT) (ms)
Wait time (t
WU
) (ms)
3 to 4
0
0
4
0
1
8
3 to 4
1
0
16
3 to 4
1
1
32
3 to 4
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| LC72140 | PLL Frequency Synthesizer(鎖相環(huán)頻率合成器) |
| LC72144M | PLL Frequency Synthesizer(鎖相環(huán)頻率合成器) |
| LC72146 | PLL Frequency Synthesizer for Electronic Tuning(用于電子調(diào)諧的鎖相環(huán)頻率合成器) |
| LC72147V | PLL Frequency Synthesizer for Electronic Tuning in Car Audio Systems |
| LC72148V | Electronic Tuning PLL Frequency Synthesizer for Car Stereo Systems |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LC72137_11 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:PLL Frequency Synthesizer |
| LC72137M | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:PLL Frequency Synthesizer for Electronic Tuning |
| LC72137MA-AE | 功能描述:時鐘合成器/抖動清除器 RoHS:否 制造商:Skyworks Solutions, Inc. 輸出端數(shù)量: 輸出電平: 最大輸出頻率: 輸入電平: 最大輸入頻率:6.1 GHz 電源電壓-最大:3.3 V 電源電壓-最小:2.7 V 封裝 / 箱體:TSSOP-28 封裝:Reel |
| LC72140 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:PLL Frequency Synthesizers |
| LC72140M | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:PLL Frequency Synthesizers |
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