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參數(shù)資料
| 型號： | LMX2335UTM |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | XO, clock |
| 英文描述： | PLLatinum Ultra Low Power Dual Frequency Synthesizer for RF Personal Communications |
| 中文描述： | PLL FREQUENCY SYNTHESIZER, 1200 MHz, PDSO16 |
| 封裝： | PLASTIC, TSSOP-16 |
| 文件頁數(shù)： | 38/48頁 |
| 文件大?。?/td> | 3127K |
| 代理商： | LMX2335UTM |
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2.0 Programming Description
(Continued)
2.4 RF2 R REGISTER
The RF2 R register contains the RF2 R_CNTR, PD_POL RF2, ID
o
RF2, and TRI-STATE ID
o
RF2 control words, in addition to two
bits that compose the F
o
LD control word. The detailed description and programming information for each control word is
discussed in the following sections. RF2 R_CNTR[14:0]
Reg. Most Significant Bit
21
20
SHIFT REGISTER BIT LOCATION
13
12
11
10
Least Significant Bit
3
2
19
18
17
16
15
14
9
8
7
6
5
4
1
0
Data Field
Address
Field
RF2
R
F
o
LD0 F
o
LD2
TRI-
STATE
ID
o
RF2
ID
o
RF2
PD_
POL
RF2
RF2 R_CNTR[14:0]
0
0
2.4.1 RF2 R_CNTR[14:0]
The RF2 reference divider (RF2 R_CNTR) can be programmed to support divide ratios from 3 to 32767. Divide ratios less than
3 are prohibited.
RF2 SYNTHESIZER PROGRAMMABLE REFERENCE DIVIDER (R COUNTER)
RF2 R[2:16]
Divide Ratio
RF2 R_CNTR[14:0]
8
7
0
0
0
0
1
1
14
0
0
1
13
0
0
1
12
0
0
1
11
0
0
1
10
0
0
1
9
0
0
1
6
0
0
1
5
0
0
1
4
0
0
1
3
0
0
1
2
0
1
1
1
1
0
1
0
1
0
1
3
4
32767
2.4.2 PD_POL RF2
The PD_POL RF2 bit is used to control the RF2 synthesizer’s phase detector polarity based on the VCO tuning characteristics.
RF2 SYNTHESIZER PHASE DETECTOR POLARITY
RF2 R[17]
Control Bit
Register Location
Description
Function
0
1
PD_POL RF2
RF2 R[17]
RF2 Phase Detector
Polarity
RF2 VCO Negative
Tuning
Characteristics
RF2 VCO Positive
Tuning
Characteristics
RF2 VCO Characteristics
10136786
2.4.3 ID
o
RF2
The ID
o
RF2 bit controls the RF2 synthesizer’s charge pump gain. Two current levels are available.
RF2 SYNTHESIZER CHARGE PUMP CURRENT GAIN
RF2 R[18]
Control Bit
Register Location
Description
Function
0
1
ID
o
RF2
RF2 R[18]
RF2 Charge Pump
Current Gain
LOW
0.95 mA
HIGH
3.80 mA
L
www.national.com
38
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| LMX2336LSLB | PLLatinum⑩ Low Power Dual Frequency Synthesizer for RF Personal Communications |
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LMX2335UTM/NOPB | 功能描述:IC FREQ SYNTHESIZER DUAL 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:* 供應商設備封裝:* 包裝:* |
| LMX2335UTMX | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:PLLatinum Ultra Low Power Dual Frequency Synthesizer for RF Personal Communications |
| LMX2336 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:PLLatinum⑩ Dual Frequency Synthesizer for RF Personal Communications |
| LMX2336 WAF | 制造商:Texas Instruments 功能描述: |
| LMX2336L | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:PLLatinum⑩ Low Power Dual Frequency Synthesizer for RF Personal Communications |
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