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參數(shù)資料
| 型號： | LMX2346 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | PLLatinum⑩ Frequency Synthesizer for RF Personal Communications |
| 中文描述： | PLLatinum⑩頻率合成射頻個人通信 |
| 文件頁數(shù)： | 23/27頁 |
| 文件大?。?/td> | 606K |
| 代理商： | LMX2346 |
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2.0 Programming Description
(Continued)
2.2.1 R_CTR[9:0]
The reference divider can be programmed to support divide ratios from 2 to 1023. Divide ratios of less than 2 are prohibited.
Reference Divider (R COUNTER)
R[10:1]
R_CNTR [9:0]
5
0
0
1
Reference Divider Ratio
2
3
1,023
9
0
0
1
8
0
0
1
7
0
0
1
6
0
0
1
4
0
0
1
3
0
0
1
2
0
0
1
1
1
1
1
0
0
1
1
2.2.2 CP_TRI
The CP_TRI control bit allows the charge pump to be switched between a normal operating mode and a high impedance output
state. This happens asynchronously or immediately with the change in CP_TRI bit.
Charge Pump TRI-STATE
R[11]
Control Bit
Register Location
Description
Function
0
1
CP_TRI
R[11]
Charge Pump
TRI-STATE
Charge Pump Operates
Normal
Charge Pump Output
in High Impedance
State
2.2.3 PD_POL
The PD_POL control bit is used to set the polarity of the phase detector based on the VCO tuning characteristic.
Phase Detector Polarity
R[12]
Control Bit
Register Location
Description
Function
0
1
PD_POL
R[12]
Phase Detector
Polarity
Negative VCO Tuning
Characteristic
Positive VCO Tuning
Characteristic
VCO Characteristics
20038409
2.2.4 LD_OUT[1:0]
The LD_Out control word is used to select which signal is routed the the LD pin.
LD Output Select
R[14:13]
LD_OUT[1:0]
LD Pin Output Mode
Output Circuit
Configuration
Push-Pull
Open-Drain
Push-Pull
Push-Pull
0
1
2
3
Digital Lock Detect
Analog Lock Detect
R divider output
N divider output
L
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相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LMX2346TM | PLLatinum⑩ Frequency Synthesizer for RF Personal Communications |
| LMX2346TMX | PLLatinum⑩ Frequency Synthesizer for RF Personal Communications |
| LMX2347 | PLLatinum⑩ Frequency Synthesizer for RF Personal Communications |
| LMX2347TM | PLLatinum⑩ Frequency Synthesizer for RF Personal Communications |
| LMX2347TMX | PLLatinum⑩ Frequency Synthesizer for RF Personal Communications |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LMX2346SLBX | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:PLLatinum⑩ Frequency Synthesizer for RF Personal Communications |
| LMX2346SLBX/NOPB | 功能描述:IC FREQ SYNTH 2.0GHZ 16LAMCSP RoHS:是 類別:集成電路 (IC) >> 時鐘/計時 - 時鐘發(fā)生器，PLL，頻率合成器 系列:PLLatinum™ 標準包裝:39 系列:- 類型:* PLL:帶旁路 輸入:時鐘 輸出:時鐘 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:* |
| LMX2346TM | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:PLLatinum⑩ Frequency Synthesizer for RF Personal Communications |
| LMX2346TM/NOPB | 功能描述:IC FREQ SYNTH 2.0GHZ 16TSSOP RoHS:是 類別:集成電路 (IC) >> 時鐘/計時 - 時鐘發(fā)生器，PLL，頻率合成器 系列:PLLatinum™ 標準包裝:39 系列:- 類型:* PLL:帶旁路 輸入:時鐘 輸出:時鐘 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:* |
| LMX2346TMX | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:PLLatinum⑩ Frequency Synthesizer for RF Personal Communications |
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