參數(shù)資料
型號(hào): LMX2364
廠商: National Semiconductor Corporation
英文描述: 2.6 GHz PLLatinum Fractional RF Frequency Synthesizer with 850 MHz Integer IF Frequency Synthesizer
中文描述: 2.6千兆赫PLLatinum分?jǐn)?shù)RF頻率合成器850 MHz的IF頻率合成器整數(shù)
文件頁(yè)數(shù): 25/39頁(yè)
文件大?。?/td> 694K
代理商: LMX2364
Programming Description
(Continued)
2.3 R0 REGISTER
Reg
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
DATA[20:0]
C2
C1
C0
R0
0
0
0
IF_
RST
IF_
CP
IF_
CPP
IF_R[14:0]
0
0
0
2.3.1 IF_R[14:0] — R Divider Ratio, IF Synthesizer
The R0 control word is used to configure the 15 Bit R Divider for the IF Synthesizer. Divide ratios ranging from 3 to 32,767 are
supported.
IF_R[14:0]
Divide
Ratio
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
3
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
4
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
1
1
0
1
0
1
32,767
2.3.2 IF_CPP — Charge Pump Polarity, IF Synthesizer
This bit controls the polarity of phase detector for the IF synthesizer. It should be set to “1” when the IF VCO has positive tuning
gain, and “0” when the tuning gain is negative.
2.3.3 IF_CP — Charge Pump Gain, IF Synthesizer
This bit controls the charge pump gain for the IF Synthesizer. Set this bit to 0 for low gain mode (100 uA) and a 1 for high gain
mode (800 uA). When FastLock mode is enabled, the charge pump gain is controlled by the FastLock circuit.
2.3.4 IF_RST — Counter Reset, IF Synthesizer
The IF Counter Reset enable bit when activated (IF_RST = 1) allows the reset of both the IF N and R dividers and sets the IF
charge pump to a TRI-STATE condition
. Upon powering up, the N counter resumes counting in "close" alignment with the R
counter. The maximum error is one prescaler cycle.
L
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相關(guān)PDF資料
PDF描述
LMX2364TM 2.6 GHz PLLatinum Fractional RF Frequency Synthesizer with 850 MHz Integer IF Frequency Synthesizer
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LMX2370 PLLatinum Dual Frequency Synthesizer for RF Personal Communications(PLLatinum技術(shù)用于射頻個(gè)人通訊的雙通道頻率合成器)
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LMX2364TM 制造商:NSC 制造商全稱:National Semiconductor 功能描述:2.6 GHz PLLatinum Fractional RF Frequency Synthesizer with 850 MHz Integer IF Frequency Synthesizer
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