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RF2516PCBA-410 参数 Datasheet PDF下载

RF2516PCBA-410图片预览
型号: RF2516PCBA-410
PDF下载: 下载PDF文件 查看货源
内容描述: VHF / UHF TRANSMIITER [VHF/UHF TRANSMIITER]
分类和应用:
文件页数/大小: 22 页 / 272 K
品牌: RFMD [ RF MICRO DEVICES ]
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RF2516  
Pin  
Function Description  
Interface Schematic  
Bias voltage reference pin for bypassing. The bypass capacitor should  
be of appropriate size to provide filtering of the reference crystal fre-  
quency and be connected directly to this pin. Diodes shown in the inter-  
face schematic provide 3kV electrostatic discharge (ESD) protection  
using the human body model.  
11  
VREF P  
VCC  
VREF P  
The RESNTR pins are used to supply DC voltage to the VCO, as well  
as to tune the center frequency of the VCO. Equal value inductors  
should be connected to this pin and pin 13.  
12  
RESNTR-  
RESNTR+ RESNTR-  
LOOP FLT  
4 kΩ  
See pin 12.  
13  
14  
RESNTR+  
LOOP FLT  
Output of the charge pump. An RC network from this pin to ground is  
used to establish the PLL bandwidth. Diodes shown in the interface  
schematic provide 3kV electrostatic discharge (ESD) protection using  
the human body model.  
VCC  
LOOP FLT  
This pin is used to set the threshold of the lock-detect circuit. A shunt  
capacitor should be used to set an RC time constant with the on-chip  
series 1k resistor. This signal is used to clamp (enable or disable) the  
MOD IN circuitry. The time constant should be approximately 10 times  
the reference period. Diodes shown in the interface schematic provide  
3kV electrostatic discharge (ESD) protection using the human body  
model.  
15  
16  
LD FLT  
VCC  
1 k  
Ω
LD FLT  
Logic “High” input selects divide-by-64 prescaler. Logic “Low” input  
selects divide-by-32 prescaler. Diodes shown in the interface sche-  
matic provide 3kV electrostatic discharge (ESD) protection using the  
human body model.  
DIV CTRL  
VCC  
DIV CTRL  
11-4  
Rev A17 060712