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參數資料
| 型號： | CDCE913_1 |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | Programmable 1-PLL VCXO Clock Synthesizer With 1.8-V, 2.5-V, and 3.3-V Outputs |
| 中文描述： | 可編程1 - PLL頻率石英振蕩器時鐘合成器的1.8 V，2.5 V和3.3 V輸出 |
| 文件頁數： | 18/23頁 |
| 文件大?。?/td> | 428K |
| 代理商： | CDCE913_1 |
www.ti.com
PLL Multiplier/Divider Definition
OUT
IN
Pdiv
N
M
(1)
VCO
IN
N
M
(2)
P = 4 – int
log
2
N
M
[if P
0 then P
0]
where
Q = int
R = N
′
– M
×
Q
N
M
CDCE913
CDCEL913
SCAS849A–JUNE 2007–REVISED AUGUST 2007
At a given input frequency (
IN
), the output frequency (
OUT
) of the CDCE913/CDCEL913 can be calculated:
where
M (1 to 511) and N (1 to 4095) are the multiplier/divide values of the PLL; Pdiv (1 to 127) is the output
divider.
The target VCO frequency (
VCO
) of each PLL can be calculated:
The PLL internally operates as fractional divider and needs the following multiplier/divider settings:
N
N
′
= N
×
2
P
;
N
≥
M;
100 MHz <
VCO
> 200 MHz.
Example:
for
IN
= 27 MHz; M = 1; N = 4; Pdiv = 2;
→
f
OUT
= 54 MHz
→
f
VCO
= 108 MHz
→
P = 4 – int(log
2
4) = 4 – 2 = 2
→
N
′
’ = 4
×
2
2
= 16
→
Q = int(16) = 16
→
R = 16 – 16 = 0
for
IN
= 27 MHz; M = 2; N = 11; Pdiv = 2;
→
f
OUT
= 74.25 MHz
→
f
VCO
= 148.50 MHz
→
P = 4 – int(log
2
5.5) = 4 – 2 = 2
→
N
′
’ = 11
×
2
2
= 44
→
Q = int(22) = 22
→
R = 44 – 44 = 0
The values for P, Q, R, and N’ are automatically calculated when using TI Pro-Clock software.
18
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Copyright 2007, Texas Instruments Incorporated
Product Folder Link(s):
CDCE913 CDCEL913
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相關代理商/技術參數 |
參數描述 |
|---|---|
| CDCE913PERF-EVM | 功能描述:時鐘和定時器開發(fā)工具 CDCE913 Perf Eval Mod RoHS:否 制造商:Texas Instruments 產品:Evaluation Modules 類型:Clock Conditioners 工具用于評估:LMK04100B 頻率:122.8 MHz 工作電源電壓:3.3 V |
| CDCE913PERF-EVM | 制造商:Texas Instruments 功能描述:CDCE913, CLOCK GENERATOR, EVAL MODULE |
| CDCE913PW | 功能描述:時鐘合成器/抖動清除器 Programmable 1PLL VCXO Clock Synth RoHS:否 制造商:Skyworks Solutions, Inc. 輸出端數量: 輸出電平: 最大輸出頻率: 輸入電平: 最大輸入頻率:6.1 GHz 電源電壓-最大:3.3 V 電源電壓-最小:2.7 V 封裝 / 箱體:TSSOP-28 封裝:Reel |
| CDCE913PWG4 | 功能描述:時鐘合成器/抖動清除器 Programmable 1-PLL VCXO Clock Synth RoHS:否 制造商:Skyworks Solutions, Inc. 輸出端數量: 輸出電平: 最大輸出頻率: 輸入電平: 最大輸入頻率:6.1 GHz 電源電壓-最大:3.3 V 電源電壓-最小:2.7 V 封裝 / 箱體:TSSOP-28 封裝:Reel |
| CDCE913PWR | 功能描述:時鐘合成器/抖動清除器 Programmable 1PLL VCXO Clock Synth RoHS:否 制造商:Skyworks Solutions, Inc. 輸出端數量: 輸出電平: 最大輸出頻率: 輸入電平: 最大輸入頻率:6.1 GHz 電源電壓-最大:3.3 V 電源電壓-最小:2.7 V 封裝 / 箱體:TSSOP-28 封裝:Reel |
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