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參數(shù)資料
| 型號： | LMX2522LQX1635/NOPB |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | PLL合成/DDS/VCOs |
| 英文描述： | PLL FREQUENCY SYNTHESIZER, 19.68 MHz, QCC28 |
| 封裝： | 5 X 5 MM, 0.75 MM HEIGHT, LLP-28 |
| 文件頁數(shù)： | 4/18頁 |
| 文件大?。?/td> | 189K |
| 代理商： | LMX2522LQX1635/NOPB |
Programming Description (Continued)
RF N Counter Setting:
Counter Name
Symbol
Function
Modulus Counter
RF_FN
RF N Divider
N = Prescaler x RF_B + RF_A + (RF_FN / f
OSC)10
4
Programmable
Counter
RF_B
Swallow Counter
RF_A
Pulse Swallow Function:
f = {Prescaler x RF_B + RF_A + (RF_FN / f
OSC)x10
4}xf
OSC where (RF_A < RF_B)
where
f
VCO: Output frequency of voltage controlled oscillator (VCO)
Prescaler Values:
Device Type
RF Prescaler
GPS Prescaler
LMX2522
8
6
LMX2532
6
8
RF_B: Preset divide ratio of binary 4-bit programmable counter (2
≤ RF_B ≤ 15)
RF_A: Preset divide ratio of binary 3-bit swallow counter (0
≤ RF_A ≤ 7 for prescaler of 8 or 0 ≤ RF_A ≤ 5 for prescaler of 6)
RF_FN: Preset numerator of binary 11-bit modulus counter (0
≤ RF_FN < 1920 for f
OSC = 19.20 MHz; 0
≤ RF_FN < 1968 for f
OSC
= 19.68 MHz).
f
OSC: Reference oscillator frequency
NOTE: For the use of reference frequencies other than those specified, please contact National Semiconductor.
LMX2522/LMX2532
www.national.com
12
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LMX2525 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:PLLatinum Dual Frequency Synthesizer System with Integrated VCOs |
| LMX2525LQ1321 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Texas Instruments 功能描述:IC PLL + VCO SMD 2525 LLP-24 |
| LMX2525LQ1321/NOPB | 功能描述:IC FREQ SYNTH DUAL W/VC0 24-LLP RoHS:是 類別:RF/IF 和 RFID >> RF 其它 IC 和模塊 系列:PLLatinum™ 標準包裝:100 系列:* |
| LMX2525LQX1321 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:PLLatinum Dual Frequency Synthesizer System with Integrated VCOs |
| LMX2525LQX1321/NOPB | 功能描述:IC FREQ SYNTH DUAL VCO 24-LLP RoHS:是 類別:RF/IF 和 RFID >> RF 其它 IC 和模塊 系列:PLLatinum™ 標準包裝:100 系列:* |
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