- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄385492 > LMX2347 (National Semiconductor Corporation) PLLatinum⑩ Frequency Synthesizer for RF Personal Communications PDF資料下載
參數(shù)資料
| 型號(hào)： | LMX2347 |
| 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(gè)人通信 |
| 文件頁數(shù)： | 24/27頁 |
| 文件大?。?/td> | 606K |
| 代理商： | LMX2347 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁當(dāng)前第24頁第25頁第26頁第27頁
2.0 Programming Description
(Continued)
2.2.5 R_OPT[2:0]
The R_OPT control words are used to optimize the performance of the reference buffer circuit for best Phase Noise and power
consumption performance based on the frequency of the reference source.
Reference Oscillator Optimization
R[17:15]
R_OPT[2:0]
Optimization Frequency
Range
5 MHz–50 MHz
50 MHz–104 MHz
Reserved—Do not use.
0
7
1-6
2.3 N REGISTER
The N register contains the PD (Power-Down), NA_CNTR, and NB_CNTR control words. The NA_CNTR, and NB_CNTR control
words are used to setup the programmable feedback divider. The PWR-DN control word is used to switch the device between the
normal operating mode and various power-down modes.
Register
Most Significant Bit
17
16
SHIFT REGISTER BIT LOCATION
10
9
Data Field
NB_CNTR [9:0]
Least Significant Bit
2
1
15
14
13
12
11
8
7
6
5
4
3
0
ADDR
0
N
NA_CNTR [4:0]
PD [1:0]
2.3.1 PD[1:0]
The PD control word is used to switch the device between the normal operating mode and various power-down modes.
Power-Down
N[2:1]
PD [1:0]
0
1
2
3
Operating Mode
Normal Operation
Synchronous Power-down
Counter Reset
Asynchronous Power-down
2.3.2 NA_CNTR[4:0]
The NA_CNTR control word is used to program theAcounter. TheAcounter is a 5-bit swallow counter used in the programmable
feedback divider. The A counter can be programmed to values ranging from 0 to 31. See Section 1.4 for details on how the value
of the A counter should be selected.
A Counter
N[7:3]
A Counter Value
0
1
31
NA_CNTR[4:0]
0
0
1
0
0
1
0
0
1
0
0
1
0
1
1
2.3.3 NB_CNTR[9:0]
The NB_CNTR control word is used to program the B counter. The B counter is a 10-bit binary counter used in the programmable
feedback divider. The B counter can be programmed to values ranging from 3 to 1023. See Section 1.4 for details on how the
value of the B counter should be selected.
B Counter
N[17:8]
B Counter Value
3
4
1023
NB_CNTR[9:0]
0
0
1
0
0
1
0
0
1
0
0
1
0
0
1
0
0
1
0
0
1
0
1
1
1
0
1
1
0
1
L
www.national.com
24
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LMX2347TM | PLLatinum⑩ Frequency Synthesizer for RF Personal Communications |
| LMX2347TMX | PLLatinum⑩ Frequency Synthesizer for RF Personal Communications |
| LMX2347SLBX | PLLatinum⑩ Frequency Synthesizer for RF Personal Communications |
| LMX2364SLEX | 2.6 GHz PLLatinum Fractional RF Frequency Synthesizer with 850 MHz Integer IF Frequency Synthesizer |
| LMX2364 | 2.6 GHz PLLatinum Fractional RF Frequency Synthesizer with 850 MHz Integer IF Frequency Synthesizer |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LMX2347_ECB3006C WAF | 制造商:Texas Instruments 功能描述: |
| LMX2347SLBX | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:PLLatinum⑩ Frequency Synthesizer for RF Personal Communications |
| LMX2347SLBX/NOPB | 功能描述:IC FREQ SYNTH 2.5GHZ 16LAMCSP RoHS:是 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:PLLatinum™ 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:* |
| LMX2347TM | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:PLLatinum⑩ Frequency Synthesizer for RF Personal Communications |
| LMX2347TM/NOPB | 功能描述:IC FREQ SYNTH 2.5GHZ 16TSSOP RoHS:是 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:PLLatinum™ 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:* |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。