- 您现在的位置：买卖IC网 > PDF目录9112 > ADF4208BRUZ-RL (Analog Devices Inc)IC PLL FREQ SYNTHESIZER 20TSSOP PDF资料下载
参数资料
| 型号： | ADF4208BRUZ-RL |
| 厂商： | Analog Devices Inc |
| 文件页数： | 13/24页 |
| 文件大小： | 0K |
| 描述： | IC PLL FREQ SYNTHESIZER 20TSSOP |
| 标准包装： | 2,500 |
| 类型： | 时钟/频率合成器，RF |
| PLL： | 是 |
| 输入： | CMOS，TTL |
| 输出： | 时钟 |
| 电路数： | 1 |
| 比率 - 输入:输出： | 3:1 |
| 差分 - 输入:输出： | 是/无 |
| 频率 - 最大： | 2GHz |
| 除法器/乘法器： | 无/无 |
| 电源电压： | 2.7 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-TSSOP（0.173"，4.40mm 宽） |
| 供应商设备封装： | 20-TSSOP |
| 包装： | 带卷 (TR) |
ADF4206/ADF4208
Rev. A | Page 20 of 24
APPLICATIONS SECTION
LOCAL OSCILLATOR FOR GSM HANDSET
RECEIVER
Figure 33 shows the ADF4208 used in a classic superheterodyne
receiver to provide the required local oscillators (LOs).
In this circuit, the reference input signal is applied to the circuit
at OSCIN and is generated by a 10 MHz crystal oscillator. This is
a low cost solution. For better performance over temperature, a
TCXO (temperature controlled crystal oscillator) can be used
instead.
To have a channel spacing of 200 kHz (the GSM standard),
the reference input must be divided by 50 using the on-chip
reference counter.
The RF output frequency range is 1050 MHz to 1086 MHz. Loop
filter component values are chosen so that the loop bandwidth is
20 kHz. The synthesizer is set up for a charge pump current of
4.375 mA and the VCO sensitivity is 15.6 MHz/V.
The IF output is fixed at 125 MHz. The IF loop bandwidth is
chosen to be 20 kHz with a channel spacing of 200 kHz. Loop
filter component values are chosen accordingly.
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.
VCO190-125T
VCC
CPRF2
VCC
S
P
I-
CO
M
P
AT
IBL
E
S
E
RI
AL
BUS
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
VCO190-1068U
01
03
6-
0
35
Figure 32. GSM Handset Receiver Local Oscillator Using the ADF4208
相关PDF资料 |
PDF描述 |
|---|---|
| ADF4001BCPZ-RL7 | IC CLOCK GEN PLL 200MHZ 20LFCSP |
| VI-B1K-MV-S | CONVERTER MOD DC/DC 40V 150W |
| ADF4001BRUZ-R7 | IC CLOCK GEN PLL 200MHZ 16TSSOP |
| VI-21K-MW-S | CONVERTER MOD DC/DC 40V 100W |
| VE-25T-IV | CONVERTER MOD DC/DC 6.5V 150W |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ADF4210 | 制造商:AD 制造商全称:Analog Devices 功能描述:Dual RF/IF PLL Frequency Synthesizers |
| ADF4210BCP | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| ADF4210BRU | 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Analog Devices 功能描述: |
| ADF4211 | 制造商:AD 制造商全称:Analog Devices 功能描述:Dual RF/IF PLL Frequency Synthesizers |
| ADF4211BCP | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
发布紧急采购，3分钟左右您将得到回复。