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參數(shù)資料
| 型號： | ADF4206BRUZ-RL |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 14/24頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC PLL FREQ SYNTHESIZER 16TSSOP |
| 產(chǎn)品變化通告： | Product Discontinuance 27/Oct/2011 |
| 標準包裝： | 1 |
| 類型： | 時鐘/頻率合成器，RF |
| PLL： | 是 |
| 輸入： | CMOS |
| 輸出： | 時鐘 |
| 電路數(shù)： | 1 |
| 比率 - 輸入:輸出： | 3:1 |
| 差分 - 輸入:輸出： | 是/無 |
| 頻率 - 最大： | 550MHz |
| 除法器/乘法器： | 無/無 |
| 電源電壓： | 2.7 V ~ 5.5 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 16-TSSOP（0.173"，4.40mm 寬） |
| 供應商設備封裝： | 16-TSSOP |
| 包裝： | 標準包裝 |
| 其它名稱： | ADF4206BRUZ-RLDKR |
ADF4206/ADF4208
Rev. A | Page 21 of 24
LOCAL OSCILLATOR FOR WCDMA RECEIVER
Figure 33 shows the ADF4208 used to generate the local
oscillator frequencies for a wideband CDMA (WCDMA)
system.
The required RF output range is 1720 MHz to 1780 MHz. The
VCO190-1750T meets this requirement. Channel spacing is
200 kHz with a 20 kHz loop bandwidth. VCO sensitivity is
32 MHz/V. A charge pump current of 4.375 mA is used and the
desired phase margin for the loop is 45°.
When the IF output is fixed at 200 MHz, the VCO190-200T is
used. It has a sensitivity of 10 MHz/V. Channel spacing and
loop bandwidth are chosen to be the same as the RF side.
OSCOUT
MUXOUT
ADF4208
VP2
VDD2 VDD1VP1
CPRF1
RF2IN
RF1IN
OSCIN
CLK
DATA
LE
DG
ND
RF
1
DG
N
D
RF
2
AG
ND
RF
1
AG
ND
RF
2
DECOUPLING CAPACITORS (22F/10pF) ON VDD, VP OF
THE ADF4208, AND ON VCC OF THE VCOs HAVE BEEN
OMITTED FROM THE DIAGRAM TO AID CLARITY.
VCO190-200T
VCC
CPRF2
VCC
S
P
I-
CO
M
P
AT
IBL
E
S
E
RI
AL
B
US
100pF
18
100pF
IFOUT
100pF
51
30pF
10MHz
18k
1.3nF
13nF
2.7k
620pF
3.3k
VP
VDD
VP
100pF
18
RFOUT
100pF 18
18
100pF
51
LOCK DETECT
30pF
VCO190-1750T
01
03
6-
0
36
Figure 33. Local Oscillator for WCDMA Receiver Using the ADF4208
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