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RF2480_06 参数 Datasheet PDF下载

RF2480_06图片预览
型号: RF2480_06
PDF下载: 下载PDF文件 查看货源
内容描述: 直接正交调制器 [DIRECT QUADRATURE MODULATOR]
分类和应用:
文件页数/大小: 8 页 / 104 K
品牌: RFMD [ RF MICRO DEVICES ]
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RF2480  
Pin  
Function Description  
Interface Schematic  
Reference voltage for the I mixer. This voltage should be the same as  
the DC voltage supplied to the I SIG pin. A voltage of 3.0V is recom-  
mended. The SIG and REF inputs are inputs of a differential amplifier.  
Therefore the REF and SIG inputs are interchangeable. If swapping the  
I SIG and I REF pins, the Q SIG and Q REF also need to be swapped  
to maintain the correct phase. It is also possible to drive the SIG and  
REF inputs in a balanced mode. This will increase the gain.  
1
I REF  
I SIG  
100 Ω  
I REF  
100 Ω  
425 Ω  
425 Ω  
For optimum carrier suppression, the DC voltages on I REF, Q REF, I  
SIG and Q SIG should be adjusted slightly to compensate for inherent  
undesired internal DC offsets; for optimum sideband suppression,  
phase and signal amplitude on IREF, Q REF, I SIG and Q SIG should  
be adjusted slightly to compensate for inherent undesired internal off-  
sets. See RFMD AN0001 for more detail.  
Reference voltage for the Q mixer. This voltage should be the same as  
the DC voltage supplied to the Q SIG pin. A voltage of 3.0V is recom-  
mended. See pin 1 for more details.  
2
3
Q REF  
GND2  
Q SIG  
Q REF  
100 Ω  
100 Ω  
425 Ω  
425 Ω  
Ground connection of the LO phase shift network. This pin should be  
connected directly to the ground plane.  
Same as pin 3.  
Same as pin 3.  
4
5
6
GND2  
GND2  
LO  
The input of the phase shifting network. This pin has an internal DC  
blocking capacitor. This port is voltage driven so matching at different  
frequencies is not required.  
LO  
Power supply for all circuits except the RF output stage. An external  
capacitor is needed if no other low frequency bypass capacitor is  
nearby.  
7
8
VCC1  
PD  
Power Down control. When this pin is "low", all circuits are shut off. A  
"low" is typically 1.2V or less at room temperature.When this pin is  
"high" (V ), all circuits are operating normally. If PD is below V , out-  
VCC  
200 Ω  
CC  
CC  
PD  
put power and performance will be degraded. Operating in this region  
is not recommended, although it might be useful in some applications  
where power control is required.  
RF Output. This pin has an internal DC blocking capacitor. At some fre-  
quencies, external matching may be needed to optimize output power.  
9
RF OUT  
RF OUT  
Ground connection for the RF output stage. This pin should be con-  
nected directly to the ground plane.  
10  
11  
12  
GND3  
VCC2  
GND1  
Power supply for the RF output amplifier. An external capacitor is  
needed if no other low frequency bypass capacitor is near by.  
Ground connection for the LO and baseband amplifiers, and for the  
mixers. This pin should be connected directly to the ground plane.  
Same as pin 12.  
Same as pin 12.  
13  
14  
GND1  
GND1  
5-26  
Rev A4 060329