2-289
RF2175
Rev A8 030313
Pin
Function
Description
Interface Schematic
1VCC
Power supply for input bias circuitry. A 1nF high frequency bypass
capacitor is recommended.
2L TUNE
Interstage Tuning. A shunt inductor to GND is required to optimize the
match.
3NC
No connection.
4Q1C
Power supply for stage 1. VCC should be fed through a 25nH or greater
inductor with a decoupling capacitor on the VCC side.
5GND1
Ground for stage 1. For best performance, keep traces physically short
and connect immediately to ground plane. This ground should be iso-
lated from the backside ground contact.
6RF IN
RF input. An external DC blocking capacitor is required if this port is
connected to a DC path to ground or a DC voltage.
7NC
No connection.
8VREG
Power Down control. When this pin is “low”, all circuits are shut off.
When this pin is 2.8V, all circuits are operating normally. VPD requires a
regulated 2.8V for the amplifier to operate properly over all specified
temperature and voltage ranges. A dropping resistor from a higher reg-
ulated voltage may be used to provide the required 2.8V. A 100pF high
frequency bypass capacitor is recommended.
9NC
No connection.
10
NC
No connection.
11
NC
No connection.
12
RF OUT
RF output and power supply for the output stage. The bias for the out-
put stage is provided through this pin and pin 13. An external matching
network is required to provide the optimum load impedance; see the
application schematics for details.
13
RF OUT
Same as pin 12.
14
RF OUT
Harmonic trap. This pin connects to the RF output but is used for pro-
viding a low impedance to the second harmonic of the operating fre-
quency. An inductor or transmission line resonating with a shunt
capacitor at 2f0 is connected to this pin.
15
NC
No connection.
16
VBIAS
The bias pin allows higher efficiency in low power power modes. When
operating at full output, VBIAS should be 2.8V.
Pkg
Base
GND
Ground connection. The backside of the package should be soldered to
a top side ground pad, which is connected to the ground plane with
multiple vias. The pad should have a short thermal path to the ground
plane.
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