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參數資料
型號: LMX2531
廠商: National Semiconductor Corporation
英文描述: PLLatinum High Performance Frequency Synthesizer System with Integrated VCO
中文描述: PLLatinum高性能頻率合成器系統的集成VCO
文件頁數: 15/25頁
文件大小: 589K
代理商: LMX2531
2.0 General Programming Information
(Continued)
2.2 REGISTER R1
2.2.1 NUM[21:12]
These are the MSB bits in for the fractional numerator that already have been described.
2.2.2 N[10:8] -- 3 MSB Bits for the N Counter
These are the 2 MSB bits for the N counter, which were discussed in the R0 register section.
2.2.3 ICP[3:0] -- Charge Pump Gain
This bit programs the charge pump current when the charge pump gain. The current is programmable between 100uAand 1.6mA
in 100uA steps. In general, higher charge pump currents yield better phase noise for the PLL, but also can cause higher spurs.
ICP
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Charge Pump State
1X
2X
3X
4X
5X
6X
7X
8X
9X
10X
11X
12X
13X
14X
15X
16X
Typical Charge Pump Current at 3 Volts (μA)
95
180
285
380
475
970
665
760
855
950
1045
1140
1235
1330
1425
1520
2.2.4 PRESC16 -- PLL Prescaler
PRESC16
0
1
Prescaler
8/9/12/13
16/17/20/21
Minimum Continuous Divide Ratio
31
55
Maximum VCO Frequency
(Before the Divider by 2)
1.2 GHz
3.0 GHz
L
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15
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相關代理商/技術參數
參數描述
LMX2531_07 制造商:NSC 制造商全稱:National Semiconductor 功能描述:High Performance Frequency Synthesizer System with Integrated VCO
LMX25311146EVAL 功能描述:時鐘和定時器開發工具 LMX2531LQ1146 EVAL BOARD RoHS:否 制造商:Texas Instruments 產品:Evaluation Modules 類型:Clock Conditioners 工具用于評估:LMK04100B 頻率:122.8 MHz 工作電源電壓:3.3 V
LMX25311146EVAL/NOPB 功能描述:射頻開發工具 LMX25311146 EVAL MOD RoHS:否 制造商:Taiyo Yuden 產品:Wireless Modules 類型:Wireless Audio 工具用于評估:WYSAAVDX7 頻率: 工作電源電壓:3.4 V to 5.5 V
LMX25311226EVAL 功能描述:時鐘和定時器開發工具 LMX2531LQ1226 EVAL BOARD RoHS:否 制造商:Texas Instruments 產品:Evaluation Modules 類型:Clock Conditioners 工具用于評估:LMK04100B 頻率:122.8 MHz 工作電源電壓:3.3 V
LMX25311226EVAL/NOPB 功能描述:射頻開發工具 LMX25311226 EVAL MOD RoHS:否 制造商:Taiyo Yuden 產品:Wireless Modules 類型:Wireless Audio 工具用于評估:WYSAAVDX7 頻率: 工作電源電壓:3.4 V to 5.5 V
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