參數(shù)資料
型號(hào)： LMX2485SQX
廠商： NATIONAL SEMICONDUCTOR CORP
元件分類： XO, clock
英文描述： 50 MHz - 3.0 GHz High Performance Delta-Sigma Low Power Dual PLLatinum⑩ Frequency Synthesizers with 800 MHz Integer PLL
中文描述： PLL FREQUENCY SYNTHESIZER, 3000 MHz, PQCC24
封裝： 4 X 4 MM, 0.8 MM, PLASTIC, LLP-24
文件頁(yè)數(shù)： 34/37頁(yè)
文件大?。?/td> 861K
代理商： LMX2485SQX
Programming Description
(Continued)
2.7 R6 REGISTER
REGISTER
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[19:0]
C3
1
C2
1
C1
0
C0
1
R6
CSR[1:0]
RF_CPF[3:0]
RF_TOC[13:0]
2.7.1 RF_TOC -- RF Time Out Counter and Control for FLoutRF Pin
The RF_TOC[13:0] word controls the operation of the RF Fastlock circuitry as well as the function of the FLoutRF output pin.
When this word is set to a value between 0 and 3, the RF Fastlock circuitry is disabled and the FLoutRF pin operates as a general
purpose CMOS TRI-STATE I/O. When RF_TOC is set to a value between 4 and 16383, the RF Fastlock mode is enabled and
the FLoutRF pin is utilized as the RF Fastlock output pin. The value programmed into the RF_TOC[13:0] word represents two
times the number of phase detector comparison cycles the RF synthesizer will spend in the Fastlock state.
RF_TOC
0
1
Fastlock Mode
Disabled
Manual
Fastlock Period [CP events]
N/A
N/A
FLoutRF Pin Functionality
High Impedance
Logic “0” State.
Forces all Fastlock conditions
Logic “0” State
Logic “1” State
Fastlock
Fastlock
Fastlock
Fastlock
2
3
4
5
…
Disabled
Disabled
Enabled
Enabled
Enabled
Enabled
N/A
N/A
4X2 = 8
5X2 = 10
…
16383X2 = 32766
16383
2.7.2 RF_CPF -- RF PLL Fastlock Charge Pump Current
Specify the charge pump current for the Fastlock operation mode for the RF PLL. Note that the Fastlock charge pump current,
steady state current, and CSR control are all interrelated.
RF_CPF
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
RF Charge Pump State
1X
2X
3X
4X
5X
6X
7X
8X
9X
10X
11X
12X
13X
14X
15X
16X
Typical RF Charge Pump Current at 3 Volts (μA)
95
190
285
380
475
570
665
760
855
950
1045
1140
1235
1330
1425
1520
L
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34
相關(guān)PDF資料
PDF描述
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LMX2487SQ 3.0 GHz - 6.0 GHz High Performance Delta-Sigma Low Power Dual PLLatinum⑩ Frequency Synthesizers with 3.0 GHz Integer PLL
LMX2487SQX 3.0 GHz - 6.0 GHz High Performance Delta-Sigma Low Power Dual PLLatinum⑩ Frequency Synthesizers with 3.0 GHz Integer PLL
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LMX2485SQX/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
LMX2486 制造商:NSC 制造商全稱:National Semiconductor 功能描述:1.0 GHz - 4.5 GHz High Performance Delta-Sigma Low Power Dual PLLatinum TM Frequency Synthesizers with 3.0 GHz Integer PLL
LMX2486EVAL 功能描述:時(shí)鐘和定時(shí)器開發(fā)工具 LMX2486 EVAL BOARD RoHS:否 制造商:Texas Instruments 產(chǎn)品:Evaluation Modules 類型:Clock Conditioners 工具用于評(píng)估:LMK04100B 頻率:122.8 MHz 工作電源電壓:3.3 V
LMX2486SQ 制造商:Texas Instruments 功能描述:PLL Frequency Synthesizer Dual 5MHz to 4500MHz 24-Pin LLP EP T/R
LMX2486SQ/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
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