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參數(shù)資料
| 型號(hào)： | LMX2485 |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類(lèi)： | XO, clock |
| 英文描述： | 50 MHz - 3.0 GHz High Performance Delta-Sigma Low Power Dual PLLatinum⑩ Frequency Synthesizers with 800 MHz Integer PLL |
| 中文描述： | PLL FREQUENCY SYNTHESIZER, 3000 MHz, PQCC24 |
| 封裝： | 4 X 4 MM, 0.8 MM, PLASTIC, LLP-24 |
| 文件頁(yè)數(shù)： | 33/37頁(yè) |
| 文件大?。?/td> | 861K |
| 代理商： | LMX2485 |
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Programming Description
(Continued)
2.6 R5 REGISTER
REGISTER
23
22
21
20
19
18
17
16
15
DATA[19:0]
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
C3
1
C2
0
C1
1
C0
1
R5
RF_FD[21:12]
RF_FN[21:12]
2.6.1 Fractional Numerator Determination { RF_FN[21:12], RF_FN[11:0], ACCESS[1] }
In the case that the ACCESS[1] bit is 0, then the part operates in 12-bit fractional mode, and the RF_FN2[21:12] bits become do
not care bits. When the ACCESS[1] bit is set to 1, the part operates in 22-bit mode and the fractional numerator is expanded from
12 to 22-bits.
Fractional
Numerator
0
1
...
4095
4096
...
4194303
RF_FN[21:12]
RF_FN[11:0]
( These bits only apply in 22- bit mode)
In 12- bit mode, these are do not care.
In 22- bit mode, for N
<
4096,
these bits should be all set to 0.
0
0
.
1
0
.
1
0
0
.
1
0
.
1
0
0
.
1
0
.
1
0
0
.
1
0
.
1
0
0
.
1
0
.
1
0
0
.
1
0
.
1
0
0
.
1
0
.
1
0
0
.
1
0
.
1
0
0
.
1
0
.
1
0
0
.
1
0
.
1
0
0
.
1
0
.
1
0
1
.
1
0
.
1
0
.
1
0
.
1
0
.
1
0
.
1
0
.
1
0
.
1
0
.
1
0
.
1
0
.
1
1
.
1
2.6.2 Fractional Denominator Determination { RF_FD[21:12], RF_FD[11:0], ACCESS[1]}
In the case that theACCESS[1] bit is 0, then the part is operates in the 12-bit fractional mode, and the RF_FD[21:12] bits become
do not care bits. When the ACCESS[1] is set to 1, the part operates in 22-bit mode and the fractional denominator is expanded
from 12 to 22-bits.
Fractional
Denominator
0
1
...
4095
4096
...
4194303
RF_FD[21:12]
RF_FD[11:0]
( These bits only apply in 22- bit mode)
In 12- bit mode, these are do not care.
In 22- bit mode, for N
<
4096,
these bits should be all set to 0.
0
0
.
1
0
.
1
0
0
.
1
0
.
1
0
0
.
1
0
.
1
0
0
.
1
0
.
1
0
0
.
1
0
.
1
0
0
.
1
0
.
1
0
0
.
1
0
.
1
0
0
.
1
0
.
1
0
0
.
1
0
.
1
0
0
.
1
0
.
1
0
0
.
1
0
.
1
0
1
.
1
0
.
1
0
.
1
0
.
1
0
.
1
0
.
1
0
.
1
0
.
1
0
.
1
0
.
1
0
.
1
1
.
1
L
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相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LMX2485E | 50 MHz - 3.0 GHz High Performance Delta-Sigma Low Power Dual PLLatinum⑩ Frequency Synthesizers with 800 MHz Integer PLL |
| LMX2485ESQ | 50 MHz - 3.0 GHz High Performance Delta-Sigma Low Power Dual PLLatinum⑩ Frequency Synthesizers with 800 MHz Integer PLL |
| LMX2485ESQX | 50 MHz - 3.0 GHz High Performance Delta-Sigma Low Power Dual PLLatinum⑩ Frequency Synthesizers with 800 MHz Integer PLL |
| LMX2485SQ | 50 MHz - 3.0 GHz High Performance Delta-Sigma Low Power Dual PLLatinum⑩ Frequency Synthesizers with 800 MHz Integer PLL |
| LMX2485SQX | 50 MHz - 3.0 GHz High Performance Delta-Sigma Low Power Dual PLLatinum⑩ Frequency Synthesizers with 800 MHz Integer PLL |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LMX2485_0610 | 制造商:NSC 制造商全稱(chēng):National Semiconductor 功能描述:50 MHz - 3.0 GHz High Performance Delta-Sigma Low Power Dual PLLatinum⑩ Frequency Synthesizers with 800 MHz Integer PLL |
| LMX2485_08 | 制造商:NSC 制造商全稱(chēng):National Semiconductor 功能描述:50 MHz - 3.0 GHz High Performance Delta-Sigma Low Power Dual PLLatinum⑩ Frequency Synthesizers with 800MHz Integer PLL |
| LMX24856211EVAL | 功能描述:時(shí)鐘和定時(shí)器開(kāi)發(fā)工具 LMX2485 & LM6211 ACTIVE FILTER RoHS:否 制造商:Texas Instruments 產(chǎn)品:Evaluation Modules 類(lèi)型:Clock Conditioners 工具用于評(píng)估:LMK04100B 頻率:122.8 MHz 工作電源電壓:3.3 V |
| LMX2485E | 制造商:NSC 制造商全稱(chēng):National Semiconductor 功能描述:50 MHz - 3.0 GHz High Performance Delta-Sigma Low Power Dual PLLatinum? Frequency Synthesizers with 800 MHz Integer PLL |
| LMX2485E EVAL | 功能描述:BOARD EVALUATION LMX2485E RoHS:否 類(lèi)別:編程器，開(kāi)發(fā)系統(tǒng) >> 評(píng)估演示板和套件 系列:PLLatinum™ 標(biāo)準(zhǔn)包裝:1 系列:PCI Express® (PCIe) 主要目的:接口，收發(fā)器，PCI Express 嵌入式:- 已用 IC / 零件:DS80PCI800 主要屬性:- 次要屬性:- 已供物品:板 |
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