4-359
RF2364
Rev A5 020827
Pin
Function
Description
Interface Schematic
1RF IN
RF input pin. This pin is DC coupled and matched to 50
Ω.
2GND1
Ground connection. Keep traces physically short and connect immedi-
ately to ground plane for best performance.
3
VPD
For low noise amplifier applications, this pin is used to control the bias
current. See plots for bias current settings. An external resistor (R1)
can be used to set the bias current for any VPD voltage (See Applica-
tion Note).
For driver amplifier applications, this is the Power Down pin for the IC.
VPD=2.8V + 0.1V is required for proper operation. VPD< 0.9V turns off
the Part. External RF bypassing is required. The trace length between
the pin and the bypass capacitors should be minimized. The ground
side of the bypass capacitors should connect immediately to ground
plane. Nominal current required for VPD=2.8V is 2.0mA typical and
3.0mA Max (@ VPD=2.9V).
4GND2
Ground connection. Keep traces physically short and connect immedi-
ately to ground plane for best performance.
5RF OUT
Amplifier Output pin. This pin is an open-collector output. It must be
biased to either VCC or pin 4 through a choke or matching inductor.
This pin is typically matched to 50
Ω with a shunt bias/matching induc-
tor and series blocking/matching capacitor. Refer to application sche-
matics.
RF IN
RF OUT
To Bias
Circuit
PD