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參數(shù)資料
| 型號： | LMX2525LQ1321 |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | XO, clock |
| 英文描述： | PLLatinum Dual Frequency Synthesizer System with Integrated VCOs |
| 中文描述： | PLL FREQUENCY SYNTHESIZER, 26 MHz, QCC24 |
| 封裝： | 5 X 4 MM, 0.75 MM HEIGHT, LLP-24 |
| 文件頁數(shù)： | 15/17頁 |
| 文件大?。?/td> | 237K |
| 代理商： | LMX2525LQ1321 |
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. Refer to the Electrical Characteristics section for power output specifications.
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 LMX2525 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
00 = Minimum Output Power
01 =
10 =
11 = Maximum Output Power
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(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LMX2525LQ1321/NOPB | 功能描述:IC FREQ SYNTH DUAL W/VC0 24-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:* |
| LMX2525LQX1321 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:PLLatinum Dual Frequency Synthesizer System with Integrated VCOs |
| LMX2525LQX1321/NOPB | 功能描述:IC FREQ SYNTH DUAL VCO 24-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:* |
| LMX2531 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:High Performance Frequency Synthesizer System with Integrated VCO |
| 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 |
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