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參數(shù)資料
| 型號： | LMX2502 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | PLLatinum⑩ Frequency Synthesizer System with Integrated VCO |
| 中文描述： | PLLatinum⑩頻率合成系統(tǒng)的集成VCO |
| 文件頁數(shù)： | 10/18頁 |
| 文件大?。?/td> | 184K |
| 代理商： | LMX2502 |
Programming Description
GENERAL PROGRAMMING INFORMATION
The serial interface has a 24-bit shift register to store the incoming data bits temporarily. The incoming data is loaded into the shift
register from MSB to LSB. The data is shifted at the rising edge of the clock signal. When the latch enable signal transitions from
LOW to HIGH, the data stored in the shift register is transferred to the proper register depending on the address bit settings. The
selection of the particular register is determined by the address bits equal to the binary representation of the number of the control
register.
At initial start-up, the MICROWIRE loading requires 4 default words (registers R3, loaded first, to R0, loaded last).After the device
has been initially programmed, the RF VCO frequency can be changed using a single register (R0). If an IF frequency other than
the default value for the device is desired the SPI_DEF bit should be set to 0, the desired values for IF_A, IF_B, and IF_R entered
and words R6 to R0 should be sent.
The control register content map describes how the bits within each control register are allocated to the specific control functions.
COMPLETE REGISTER MAP
R
MSB
SHIFT REGISTER BIT LOCATION
LSB
23
22
21
20 19
18 17 16 15 14 13 12
11
10 9 8 7 6 5
4
3
2
1 0
R0
(Default)
R1
(Default)
SPI_
DEF
IF_
FREQ
[1:0]
IF_
CUR[1:0]
BW_
DUR
[1:0]
0
RF_
SEL
RF_
LD
OSC_
FREQ
0
RF_B
[3:0]
0
RF_A
[2:0]
0
RF_FN
[10:0]
0 0
1
0
0
0
0
0
SPUR_
RDT
[1:0]
1
0
0 1 0 1 OB_
CRL
[1:0]
RF_
EN
IF_
EN
0 1
R2
(Default)
R3
(Default)
0
0
1
0
0
1
1
1
0
1
0
1 0 1 0 0
0
1
0
1 0
BW_
CRL
[1:0]
0
BW_
EN
1
0
1
1
1
1
0
1
0
0 0 1 1 0
VCO_
CUR
[1:0]
0
1 1
R4
0
1
0
0
0
IF_A
[3:0]
1
IF_B
[8:0]
0
1
1 1
R5
0
0
1
1
0
0
0
0
0
IF_R
[8:0]
0
0
1
1
1 1
R6
1
0
0
0
0
0
0
0
0
0
0
0
0
0 0 0 0
0
1
1
1
1 1
NOTE:
Bold
numbers represent the address bits.
L
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LMX25021635EVAL | 制造商:OC White Company 功能描述:Evaluation Board For LMX2502 PLLatinum Frequency Synthesizer |
| LMX25021635EVAL/NOPB | 功能描述:EVALUATION BOARD FOR LMX25021635 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 |
| LMX2502LQ1635 | 功能描述:鎖相環(huán) - PLL RoHS:否 制造商:Silicon Labs 類型:PLL Clock Multiplier 電路數(shù)量:1 最大輸入頻率:710 MHz 最小輸入頻率:0.002 MHz 輸出頻率范圍:0.002 MHz to 808 MHz 電源電壓-最大:3.63 V 電源電壓-最小:1.71 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:QFN-36 封裝:Tray |
| LMX2502LQ1635/NOPB | 功能描述:鎖相環(huán) - PLL RoHS:否 制造商:Silicon Labs 類型:PLL Clock Multiplier 電路數(shù)量:1 最大輸入頻率:710 MHz 最小輸入頻率:0.002 MHz 輸出頻率范圍:0.002 MHz to 808 MHz 電源電壓-最大:3.63 V 電源電壓-最小:1.71 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:QFN-36 封裝:Tray |
| LMX2502LQ1635/S7001911 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Texas Instruments 功能描述: |
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