RF2304
Pin
1
Function Description
Interface Schematic
Ground connection. For best performance, keep traces physically short
GND
and connect immediately to ground plane.
Same as pin 1.
2
3
GND
RF IN
DC coupled RF input. A broadband impedance match is produced by
internal shunt resistive feedback. The DC level is approximately
200mV. If a DC path exists in the connected circuitry, an external DC-
blocking capacitor is required to properly maintain the DC operating
point.
Same as pin 1.
Same as pin 1.
4
5
6
GND
GND
RF OUT
RF output. A broadband impedance match is produced by internal
shunt resistive feedback. The DC connection to the power supply is
provided through an external chip inductor having greater than 150Ω
reactance at the operating frequency. An external DC-blocking capaci-
tor is required if the following circuitry is not DC-blocked.
VDD
RF OUT
RF IN
Bias control connection. This pin is normally connected to the power
supply, but can be used to switch the amplifier on and off by switching
between power supply voltage and ground. This pin sinks approxi-
7
8
VDD2
NC
mately 600μA when connected to V , and sources less than 10μA
DD
when grounded.
No connection.
Application Schematic
VDD
1 nF
1
2
3
4
8
7
6
5
L1
RF Choke
100 pF
RF IN
100 pF
Rev A7 060908
4-203
RFMD [ RF MICRO DEVICES ]
