RF2104PCBA-L Ver la hoja de datos (PDF) - RF Micro Devices
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RF2104PCBA-L Datasheet PDF : 8 Pages
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RF2104
Pin Function Description
Interface Schematic
1
VCC1
Power supply for the bias circuits.This pin draws current proportional to
VCC1
VPC. When VPC is 2.5V the maximum current is about 30mA. When
VPC goes down to 0V the current also goes down to 0mA.
PC
To Bias
Stages
40 Ω
2
2
GND
Ground connection. For best performance, keep traces physically short
and connect immediately to ground plane. A via hole under each
ground pin to the ground plane is recommended.
3
GND
Same as pin 2.
4
VCC2
Power supply for the driver stage and interstage matching. An external
decoupling capacitor is required. The electrical length between the pin
VCC2
and this capacitor affects the gain. See the application schematic for
recommended line length for optimum gain. For operation at frequen-
RF IN
cies below 600MHz a series inductor is required.
From Bias
Stages
5
RF IN
50Ω RF input. DC voltages are present at this pin, and an external
See pin 4 schematic.
blocking capacitor is required when connecting this pin to a DC path to
ground. For optimum impedance matching, a shunt inductor to ground
is recommended; see the application schematic for details.
6
GND
Same as pin 2.
7
GND
Same as pin 2.
8
PC
Power control pin. A DC voltage between 0V and 3.0V can be applied See pin 1 schematic.
to control the gain. When no gain control is required this pin should be
connected to a fixed voltage between 2.5V and 3.0V. This pin draws
some current proportional to VPC. When VPC is 2.5V the maximum cur-
rent into this pin is about 1mA.
9
GND
Same as pin 2.
10
GND
Same as pin 2.
11
GND
Same as pin 2.
12
RF OUT RF output. The power supply for the output stage also needs to be sup-
plied to this pin through the external matching circuit. The load imped-
ance to this pin should be 5+j0Ω for maximum output power.
RF OUT
13
RF OUT Same as pin 12.
14
GND
Same as pin 2.
15
GND
Same as pin 2.
16
GND
Same as pin 2.
From Bias
Stages
See pin 12 schematic.
Rev B4 010507
2-13
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