RF2129
Pin
1
Function Description
Interface Schematic
Bias supply pin for the first stage. A small tuning capacitor is required to
VCC2
VCC2
set the desired frequency response. External low frequency bypass
capacitors should be connected as shown in the application schematic
if no other low frequency decoupling is nearby.
RF IN
BIAS
2
Connected internally to pin 1.
Not internally connected.
See pin 1.
2
3
4
VCC2
NC
RF IN
RF input. This input is DC coupled, so an external blocking capacitor is See pin 1.
required if this pin is connected to a DC path.
Power control pin. For maximum power this pin should be 3.3V. A
higher voltage is not recommended. For less output power and reduced
5
PC
VCC1
idle current this voltage may be reduced.
500Ω
PC
To RF
Stages
RF output and bias for the output stage. The power supply for the out-
put transistor needs to be supplied to this pin. This can be done
through a quarter-wave length microstrip line that is RF grounded at the
other end, or through an RF inductor that supports the required DC cur-
rents.
6
RF OUT
RF OUT
Same as pin 6.
See pin 6.
See pin 5.
7
8
RF OUT
VCC1
Power supply pin for the bias circuits. External low frequency bypass
capacitors should be connected if no other low frequency decoupling is
nearby.
Ground connection. The backside of the package should be connected See pin 1 and 6.
to the ground plane through a short path, i.e., vias under the device
may be required.
Pkg
Base
GND
Rev B4 000323
2-95
RFMD [ RF MICRO DEVICES ]
