RF2442
Pin
1
Function
VCC1
Description
Supply voltage for the LNA. External RF and IF bypassing is required. The
trace length between the pin and the bypass capacitors should be mini-
mized. The ground side of the bypass capacitors should connect immedi-
ately to ground plane. This pin connects to pin 8 through a 150Ω resistor.
This allows for simple biasing of the collector at pin 6. Refer to Application
Schematics 1 and 3.
Ground connection. For best performance, keep traces physically short
and connect immediately to ground plane.
RF input pin. This pin is internally DC-blocked and matched to 50Ω for fre-
quencies above 1GHz. When using below 1GHz, it is recommended that
this pin be matched with series inductance to series-resonate out the inter-
nal blocking capacitor. Refer to Application Schematics 1 and 2.
Ground connection. For best performance, keep traces physically short
and connect immediately to ground plane.
No connection. This pin is typically left unconnected or grounded.
LNA Output pin. This pin is an open-collector output. It must be biased to
either V
CC
or pin 8 through a choke or matching inductor. This pin is typi-
cally matched to 50Ω with a shunt bias/matching inductor and series
blocking/matching capacitor. Refer to application schematics.
No connection. This pin is typically left unconnected or grounded.
Optional power supply connection for biasing pin 6. This pin connects to
pin 1 through a 150Ω resistor. This allows for simple biasing of the collec-
tor at pin 6. When used, this pin should be RF bypassed. Refer to Applica-
tion Schematics 1 and 3.
See pin 3.
Interface Schematic
150
Ω
VCC1
BIAS
VCC2
2
3
GND1
RF IN
To bias circuits
LNA OUT
LNA IN
4
5
6
GND2
NC
RF OUT
7
8
NC
VCC2
See pin 1.
Package Drawing
0.192
± 0.008
0.012
0.006
± 0.003
-A-
0.0256
0.118
± 0.004 sq
6° MAX
0° MIN
0.034
0.021
± 0.004
0.006
± 0.002
Shaded lead is pin 1.
4 of 12
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support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
Rev B8 DS080128
RFMD [ RF MICRO DEVICES ]
