参数资料
| 型号： | ADF4208BRUZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 11/24页 |
| 文件大小： | 0K |
| 描述： | IC PLL FREQ SYNTHESIZER 20TSSOP |
| 标准包装： | 75 |
| 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： | 管件 |
ADF4206/ADF4208
Rev. A | Page 19 of 24
RF2 Prescaler Value
P6 in the RF2 AB counter latch sets the RF2 prescaler value.
See Figure 29.
RF2 Power-Down
P7 in Figure 29 is the power-down bit for the RF2 side.
RF SECTION (RF1)
Programmable RF1 Reference (R) Counter
If Control Bit C2 and Control Bit C1 are 1 and 0, the data is
transferred from the input shift register to the 14-bit RF1 R
counter. Figure 30 shows the input shift register data format for
the RF1 R counter and the divide ratios that are possible.
RF1 Phase Detector Polarity
P9 sets the RF1 phase detector polarity. When the RF1 VCO
characteristics are positive this is set to 1. When negative it is set
to 0. See Figure 30.
RF1 Charge Pump Three-State
P10 puts the RF1 charge pump into three-state mode when
programmed to a 1. It is set to 0 for normal operation.
RF1 Program Modes
Figure 28 and Figure 30 show how to set up the program modes
in the ADF420x family.
RF1 Charge Pump Currents
Bit P13 programs the current setting for the RF1 charge pump.
See Figure 30.
Programmable RF1 AB Counter
If Control Bit C2 and Control Bit C1 are 1 and 1, then the data
in the input register is used to program the RF1 AB counter.
The AB counter is a 6-bit swallow counter (A counter) and
11-bit programmable counter (B counter). Figure 31 shows the
input register data format for programming the RF1 AB counter
and the divide ratios that are possible.
RF1 Prescaler Value
P14 in the RF1 A, B counter latch sets the RF1 prescaler value.
RF1 Power-Down
Setting P16 in the RF1 AB counter high powers down RF1 side.
RF Fast Lock
The fast lock feature improves the lock time of the PLL. It
increases charge pump current to a maximum for a time.
Activate fast lock of the ADF420x family by setting P13 in the
reference counter high and setting the fast lock switch on using
MUXOUT. Switching in an external resistor using MUXOUT
compensates the loop dynamics for the effect of increasing
charge pump current. Setting P13 low removes the PLL from
fast lock mode.
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相关代理商/技术参数 |
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| ADF4208BRUZ-R7 | 功能描述:IC PLL FREQ SYNTHESIZER 20TSSOP RoHS:是 类别:集成电路 (IC) >> 时钟/计时 - 时钟发生器，PLL，频率合成器 系列:- 标准包装:1,000 系列:Precision Edge® 类型:时钟/频率合成器 PLL:无 输入:CML，PECL 输出:CML 电路数:1 比率 - 输入:输出:2:1 差分 - 输入:输出:是/是 频率 - 最大:10.7GHz 除法器/乘法器:无/无 电源电压:2.375 V ~ 3.6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:16-VFQFN 裸露焊盘，16-MLF? 供应商设备封装:16-MLF?（3x3） 包装:带卷 (TR) 其它名称:SY58052UMGTRSY58052UMGTR-ND |
| ADF4208BRUZ-RL | 功能描述:IC PLL FREQ SYNTHESIZER 20TSSOP RoHS:是 类别:集成电路 (IC) >> 时钟/计时 - 时钟发生器，PLL，频率合成器 系列:- 标准包装:1,000 系列:Precision Edge® 类型:时钟/频率合成器 PLL:无 输入:CML，PECL 输出:CML 电路数:1 比率 - 输入:输出:2:1 差分 - 输入:输出:是/是 频率 - 最大:10.7GHz 除法器/乘法器:无/无 电源电压:2.375 V ~ 3.6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:16-VFQFN 裸露焊盘，16-MLF? 供应商设备封装:16-MLF?（3x3） 包装:带卷 (TR) 其它名称:SY58052UMGTRSY58052UMGTR-ND |
| 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: |
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