RF2472G datasheet(3/10 Pages) RFMD

3 / 10 page

4-509

RF2472

Rev A10 040927

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

RF2472G Arkusz danych(PDF) 3 Page - RF Micro Devices