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4-509
RF2472
Rev A10 040927
Pin
Function
Description
Interface Schematic
1VCC
Supply connection. An external bypass capacitor may be required in
some applications.
See pin 3.
2GND
Ground connection. Keep traces physically short and connect immedi-
ately to ground plane for best performance.
3RF IN
RF input pin. This pin is DC coupled and matched to 50
Ω at 2.4GHz.
4PD
Power down pin.This pin enables the bias to the amplifier. To turn the
amplifier on, this pin should be connected to VCC. Connecting this pin
to ground, will turn the amplifier off and reduce the current draw to
below 1
μA. 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).
5RF OUT
LNA Output pin.This pin is an open-collector output. It must be biased
to VCC through a choke or matching inductor. This pin is typically
matched to 50
Ω with a shunt bias/matching inductor and series block-
ing/matching capacitor. Refer to application schematics.
See pin 3.
RF IN
RF OUT
VCC
BIAS
PD
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