RF2370
Pin
1
Function Description
Interface Schematic
For low noise amplifier applications, this pin is used to control the bias
current. An external resistor can be used to set the bias current for any
voltage.
BIAS
VBIAS
V
BIAS
Ground connection. For best performance, keep traces physically short
and connect immediately to ground plane.
2
3
GND1
RF IN
RF input pin. This part is designed such that 50Ω is the optimal source
impedance for best noise figure. Best noise figure is achieved with only
a series capacitor on the input.
To Bias
Circuit
RF OUT
RF IN
Amplifier output pin. This pin is an open-collector output. It must be
4
5
RF OUT
GND2
biased to V through a choke or matching inductor. This pin is
CC
matched to 50Ω with a shunt L, series L topology enhances to stability
of the device by reducing the high frequency gain above 6GHz.
See GND1.
This pin selects high gain and bypass modes.
Gain Select<0.8V, high gain.
Gain Select>1.8V, low gain.
6
GAIN
SELECT
A series resistor of 100Ω is required on this pin to enhance stability.
Rev A4 050727
1-3
RFMD [ RF MICRO DEVICES ]
