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RF2513 参数 Datasheet PDF下载

RF2513图片预览
型号: RF2513
PDF下载: 下载PDF文件 查看货源
内容描述: UHF发送器 [UHF TRANSMITTER]
分类和应用: 光电二极管
文件页数/大小: 14 页 / 323 K
品牌: RFMD [ RF MICRO DEVICES ]
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RF2513  
Pin  
14  
Function Description  
Interface Schematic  
This pin is used to select the prescaler modulus. A logic “high” selects  
64 or 128 for the prescaler divisor. A logic “low” selects 65 or 129 for  
the prescaler divisor.  
MOD CTRL  
MOD CTL  
This pin is used to select the desired prescaler divisor. A logic “high”  
selects the 64/65 divisor. A logic low selects the 128/129 divisor.  
15  
16  
DIV CTRL  
DIV CTL  
FM analog or digital modulation can be imparted to the VCO through  
this pin. The VCO varies in accordance to the voltage level presented  
to this pin. To set the deviation to a desired level, a voltage divider refer-  
enced to Vcc is the recommended. Because the modulation varactors  
are part of the resonator tank, the deviation is slightly dependent upon  
the components used in the external tank.  
See pin 18.  
MOD IN  
This pin is used to is supply DC bias to the VCO, prescaler, and PLL.  
17  
18  
VCC2  
RESNTR-  
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 20.  
RESNTR+  
RESNTR-  
4 k  
MOD IN  
Not internally connected.  
See pin 18.  
19  
20  
21  
NC  
RESNTR+  
GND3  
See pin 18.  
GND is the ground shared on chip by the VCO, prescaler, and PLL  
electronics. Keep traces physically short and connect immediately to  
ground plane for best performance.  
Loop filter input to VCO.  
RESNTR+  
RESNTR-  
22  
23  
24  
VCO TUNE  
11  
4 k  
VCO TUNE  
Output of the charge pump. An RC network from this pin to ground is  
used to establish the PLL bandwidth.  
LOOP FLT  
OUT  
VCC  
LOOP FLT  
A logic high (OSC SEL>2.0V) applied to this pin powers on reference  
oscillator 2 and powers down reference oscillator 1. A logic low (OSC  
SEL<1.0V) applied to this pin powers on reference oscillator 1 and  
powers down reference oscillator 2.  
OSC SEL  
ESD  
This diode structure is used to provide electrostatic discharge protec-  
tion to 3kV using the Human body model. The following pins are pro-  
tected: 1-3, 9, 10,12-15, 17, 21-23.  
VCC  
11-26  
Rev B8 010509