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參數(shù)資料
| 型號(hào)： | LMX2485SQX |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 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 |
| 文件頁數(shù)： | 27/37頁 |
| 文件大?。?/td> | 861K |
| 代理商： | LMX2485SQX |
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Programming Description
(Continued)
2.2 R1 REGISTER
REGISTER
23
22
21
20
19
18
17
16
DATA[19:0]
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
C3
0
C2
0
C1
1
C0
1
R1
RF_PD
RF_P
RF_R[5:0]
RF_FD[11:0]
2.2.1 RF_FD[11:0] -- RF PLL Fractional Denominator
The function of these bits are described in section 2.6.2.
2.2.2 RF_R [5:0] -- RF R Divider Value
The RF R Counter value is determined by this control word. Note that this counter does allow values down to one.
R Value
1
...
63
RF_R[5:0]
0
.
1
0
.
1
0
.
1
0
.
1
0
.
1
1
.
1
2.2.3 RF_P -- RF Prescaler bit
The prescaler used is determined by this bit.
RF_P
0
1
Prescaler
8/9/12/13
16/17/20/21
Maximum Frequency
2000 MHz
3000 MHz
2.2.4 RF_PD -- RF Power Down Control Bit
When this bit is set to 0, the RF PLL operates normally. When it is set to one, the RF PLL is powered down and the RF Charge
pump is set to a TRI-STATE mode. The CE pin and ATPU bit also control power down functions, and will override the RF_PD bit.
The order of precedence is as follows. First, if the CE pin is LOW, then the PLL will be powered down. Provided this is not the
case, the PLL will be powered up if the ATPU bit says to do so, regardless of the state of the RF_PD bit. After the CE pin and the
ATPU bit are considered, then the RF_PD bit then takes control of the power down function for the RF PLL.
L
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相關(guān)代理商/技術(shù)參數(shù) |
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| LMX2485SQX/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 |
| LMX2486 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:1.0 GHz - 4.5 GHz High Performance Delta-Sigma Low Power Dual PLLatinum TM Frequency Synthesizers with 3.0 GHz Integer PLL |
| LMX2486EVAL | 功能描述:時(shí)鐘和定時(shí)器開發(fā)工具 LMX2486 EVAL BOARD RoHS:否 制造商:Texas Instruments 產(chǎn)品:Evaluation Modules 類型:Clock Conditioners 工具用于評(píng)估:LMK04100B 頻率:122.8 MHz 工作電源電壓:3.3 V |
| LMX2486SQ | 制造商:Texas Instruments 功能描述:PLL Frequency Synthesizer Dual 5MHz to 4500MHz 24-Pin LLP EP T/R |
| LMX2486SQ/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 |
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