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參數(shù)資料
| 型號(hào)： | LMX2470SLEX |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | XO, clock |
| 英文描述： | 2.6 GHz Delta-Sigma Fractional-N PLL with 800 MHz Integer-N PLL |
| 中文描述： | PLL FREQUENCY SYNTHESIZER, 2600 MHz, PQCC24 |
| 封裝： | CSP-24 |
| 文件頁數(shù)： | 26/36頁 |
| 文件大小： | 453K |
| 代理商： | LMX2470SLEX |
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Programming Description
(Continued)
2.1 R0 REGISTER
Note that this register has only one control bit. The reason for this is that it enables the N counter value to be changed with a
single write statement to the PLL.
REGISTER
23
22
21
20
DATA[19:0] ( Except for the RF_N Register, which is [22:0] )
RF_N[10:0]
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
C3
C2
C1
C0
0
R0
FN[11:0]
2.1.1 RF_FN[11:0] -- Fractional Numerator for RF PLL
Refer to section 2.8.1 for a more detailed description of this control word.
2.1.2 RF_N[10:0] -- RF N Counter Value
The RF N counter contains a 16/17/20/21 prescaler. Because there is only one selection of prescaler, the value that is
programmed is simply the N counter value converted into binary form. However, because this counter does have a prescaler,
there are limitations on the divider values.
RF_N
RF_N[10:0]
RF_C
N values less than or equal to 65 are prohibited.
Possible only with a second order delta-sigma engine
Possible with a second or third order delta-sigma engine.
0
1
0
0
1
0
.
.
.
1
1
1
Possible with a second or third order delta-sigma engine.
Possible only with a second order delta-sigma engine.
N values above 2046 are prohibited.
RF_B
RF_A
≤
65
66
67
68
69
...
2040
0
0
.
1
0
0
.
1
0
0
.
1
0
0
.
1
0
0
.
1
1
1
.
0
0
0
.
0
0
1
.
0
2041-2044
2045-2046
>
2046
L
www.national.com
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相關(guān)PDF資料 |
PDF描述 |
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| LMX2485 | 50 MHz - 3.0 GHz High Performance Delta-Sigma Low Power Dual PLLatinum⑩ Frequency Synthesizers with 800 MHz Integer PLL |
| 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 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LMX2470SLEX/NOPB | 功能描述:鎖相環(huán) - PLL RoHS:否 制造商:Silicon Labs 類型:PLL Clock Multiplier 電路數(shù)量:1 最大輸入頻率:710 MHz 最小輸入頻率:0.002 MHz 輸出頻率范圍:0.002 MHz to 808 MHz 電源電壓-最大:3.63 V 電源電壓-最小:1.71 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:QFN-36 封裝:Tray |
| LMX2471 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:3.6 GHz Delta-Sigma Fractional-N PLL with 1.7 GHz Integer-N PLL |
| LMX2471 WAF | 制造商:Texas Instruments 功能描述: |
| LMX2471SLEX | 功能描述:IC PLL LP 3.6GHZ/1.7GHZ 24-CSP RoHS:否 類別:集成電路 (IC) >> 時(shí)鐘/計(jì)時(shí) - 時(shí)鐘發(fā)生器，PLL，頻率合成器 系列:- 標(biāo)準(zhǔn)包裝:39 系列:- 類型:* PLL:帶旁路 輸入:時(shí)鐘 輸出:時(shí)鐘 電路數(shù):1 比率 - 輸入:輸出:1:10 差分 - 輸入:輸出:是/是 頻率 - 最大:170MHz 除法器/乘法器:無/無 電源電壓:2.375 V ~ 3.465 V 工作溫度:0°C ~ 70°C 安裝類型:* 封裝/外殼:* 供應(yīng)商設(shè)備封裝:* 包裝:* |
| LMX2471SLEX/NOPB | 制造商:Texas Instruments 功能描述:PLL Dual 250MHz to 3600MHz 24-Pin LAM CSP T/R |
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