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參數資料
| 型號： | LMX2505LQ1321 |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | XO, clock |
| 英文描述： | PLLatinu Dual Frequency Synthesizer System with Integrated VCOs |
| 中文描述： | PLL FREQUENCY SYNTHESIZER, 26 MHz, QCC28 |
| 封裝： | 5 X 5 MM, 0.75 MM HEIGHT, LLP-28 |
| 文件頁數： | 14/16頁 |
| 文件大?。?/td> | 231K |
| 代理商： | LMX2505LQ1321 |
Programming Description
(Continued)
R1 REGISTER
The R1 register address bits (R1 [1:0]) are “01”.
The SPI_DEF bit allows for the programming of words R3 to R5. Under most circumstances, the SPI_DEF bit should be set to
1.
The LD bit sets the function of the lock detect pin. Enabling the lock detect function provides a digital lock detect output of the
active RF synthesizer at the LD pin.
The OB_CRL [1:0] bits determine the power level of the RF output buffer. The power level can be adjusted to best meet the
system requirement.
The reference frequency selection bits, OSC_FREQ [1:0], are used to set the reference clock and R divider for use with one of
the following reference frequencies: 12.6 MHz, 14.4 MHz, 25.2 MHz or 26.0 MHz. The LMX2505 uses the OSC_FREQ bits along
with the BS and RX/TX bits to determine the correct divide ratios needed to meet the required channel spacing for the mode of
operation selected. Refer to
Table 6
for a summary of denominator values.
R1 REGISTER
R
MSB
23
SHIFT REGISTER BIT LOCATION
16
15
14
13
Data Field
LSB
0
22
21
20
19
18
17
12
11
10
9
8
7
6
5
4
3
2
1
Address
Field
0
R1
(Default)
SPI_
DEF
0
0
1
0
0
1
0
1
0
0
0
0
0
0
1
0
LD
OB_
CRL
[1:0]
OSC_
FREQ
[1:0]
1
Name
SPI_DEF
Functions
Default Register Selection
0 = OFF (Use values set in R0 to R5)
1 = ON (Use default values set in R0 to R2)
Lock Detect
0 = Disable (GND)
1 = Enable
Output Buffer Control
PDC1500, PDC800
00 = -10 dBm, -12 dBm
01 = -7 dBm, -8 dBm
10 = -4 dBm, -6 dBm
11 = -2 dBm, -3 dBm
Reference Frequency Selection
00 = 12.6 MHz
01 = 14.4 MHz
10 = 25.2 MHz
11 = 26.0 MHz
LD
OB_CRL [1:0]
OSC_FREQ [1:0]
L
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相關代理商/技術參數 |
參數描述 |
|---|---|
| LMX2505LQ1321/NOPB | 功能描述:IC FREQ SYNTH DUAL W/VCO 28LLP RoHS:是 類別:RF/IF 和 RFID >> RF 其它 IC 和模塊 系列:PLLatinum™ 標準包裝:100 系列:* |
| LMX2505LQX1321 | 功能描述:IC SYNTHESIZER PLL VCO 28-LLP RoHS:是 類別:RF/IF 和 RFID >> RF 其它 IC 和模塊 系列:PLLatinum™ 標準包裝:100 系列:* |
| LMX2512 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:PLLatinum⑩ Frequency Synthesizer System with Integrated VCO |
| LMX25120967EVAL | 制造商:OC White Company 功能描述:Evaluation Board For LMX2522 PLLatinum Frequency Synthesizer System |
| LMX25120967EVAL/NOPB | 功能描述:EVALUATION BOARD FOR LMX25120967 RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 評估演示板和套件 系列:PLLatinum™ 標準包裝:1 系列:PCI Express® (PCIe) 主要目的:接口，收發(fā)器，PCI Express 嵌入式:- 已用 IC / 零件:DS80PCI800 主要屬性:- 次要屬性:- 已供物品:板 |
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