RF2381 데이터 시트보기 (PDF) - RF Micro Devices
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RF2381 Datasheet PDF : 8 Pages
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RF2381
Pin Function Description
Interface Schematic
1
RF OUT RF output pin. This pin is DC-coupled and requires VCC through a bias
inductor sized accordingly to provide a high pass transformation with a
series capacitor.
2
GND
Ground connection. For best performance, keep traces physically short
and connect immediately to ground plane.
3
GC
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.
4
RF IN
RF input pin. This pin is DC-coupled.
5
GND
Ground connection. For best performance, keep traces physically short
4
6
VCC
and connect immediately to ground plane.
Power supply. This pin should be connected to a regulated supply and
requires a series inductor and 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.
Application Schematic
1850MHz to 1910MHz
RF IN
100 pF
VCC
2.7 nH
33 nF
33 pF
33 nF
4
3
GC
5 ATT
ATT
6
2
1 pF
1
RF OUT
Note orientation of
package in this schematic.
2.7 nH*
VCC
*For W-CDMA, use 2.2 nH
4-46
Rev A1 010511
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