RF2472
Pin
1
Function Description
Interface Schematic
See pin 3.
Supply connection. An external bypass capacitor may be required in
VCC
GND
RF IN
some applications.
Ground connection. Keep traces physically short and connect immedi-
ately to ground plane for best performance.
2
3
RF input pin. This pin is DC coupled and matched to 50Ω at 2.4GHz.
VCC
PD
BIAS
RF OUT
RF IN
Power down pin.This pin enables the bias to the amplifier. To turn the
4
5
PD
amplifier on, this pin should be connected to V . Connecting this pin
CC
to ground, will turn the amplifier off and reduce the current draw to
below 1μA. This pin is a CMOS input. There is no DC current draw
other than the transient current required to charge or discharge the
gate capacitance (less than 5pF).
LNA Output pin.This pin is an open-collector output. It must be biased See pin 3.
RF OUT
to V through a choke or matching inductor. This pin is typically
CC
matched to 50Ω with a shunt bias/matching inductor and series block-
ing/matching capacitor. Refer to application schematics.
Rev A10 040927
4-509
RFMD [ RF MICRO DEVICES ]
