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4-46
RF2377
Rev A9 010411
4
Application Schematic
W-CDMA Application Schematic
Pin
Function
Description
Interface Schematic
1RF OUT
RF output pin. This pin is DC coupled and requires VCC throughabias
inductor sized accordingly to provide a high pass transformation with a
series capacitor.
2GND
Ground connection. Keep traces physically short and connect immedi-
ately to ground plane for best performance.
3GC
Analog gain control pin. This pin controls the gain of the IC. Minimum
gain occurs at VGC<0.4V and maximum gain is achieved with
VGC=2.0V. 50dB of linear gain control with little variation of input P1dB
is available.
4RF IN
RF input pin. This pin is DC coupled.
5GND
Ground connection. Keep traces physically short and connect immedi-
ately to ground plane for best performance.
6VCC
Power supply. This pin should be connected to a regulated supply and
requires a bypass capacitor. Voltage is supplied through this pin to the
first stage collector; this voltage also controls the bias. Gain may be
tuned by adjusting the value of the feed inductor.
RF IN
4
5
6
3
2
1
Note orientation of
package in this schematic.
1pF
GC
4.7 nH
47 nF
VCC
RF OUT
3.3 nH
47 nH
VCC
ATT
ATT
100 pF
RF IN
4
5
6
3
2
1
Note orientation of
package in this schematic.
1.2 pF
GC
4.7 nH
15 pF
VCC
2.7 nH
47 nH
VCC
ATT
ATT
15 pF
0.5 pF
2.2 nH
29 nH
29 nH
15 pF
1uF
RF OUT
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