RF2127 Ver la hoja de datos (PDF) - RF Micro Devices
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RF2127 Datasheet PDF : 6 Pages
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RF2127
Pin Function Description
Interface Schematic
1
VCC2
Power supply for the driver stage and interstage matching. Matching is
typically done by a microstrip line to VCC that is RF grounded at the
VCC side. See the application information for details.
2
GND1
Ground connection for the driver stage. Keep traces physically short
and connect immediately to the ground plane for best performance.
This connection should be separated from the ground connection for
the output stage, i.e., using separate traces and vias.
2
3
PD
Power Down control. When this pin is "low", all circuits are shut off. A
"low" is typically 1.2V or less at room temperature. When this pin is
"high", all circuits are operating normally. A "high" is VCC. If VPD is
below VCC, output power and performance will be degraded. This could
be used to obtain some gain control, but results are not guaranteed.
4
RF IN
RF Input. This is a 50 Ω input, but the actual impedance depends on
the matching provided on pin 1. An external DC blocking capacitor is
required if this port is connected to a DC path to ground.
5
GND2
Ground connection for the output stage. Keep traces physically short
and connect immediately to the ground plane for best performance.
This connection should be separated from the ground connection for
the driver stage, i.e., using separate traces and vias.
6
RF OUT RF Output and power supply for the output stage. Bias for the output
stage needs to be provided on this pin. This can be done through a
quarter-wave microstrip that is RF grounded on the other end. For
matching to 50 Ω, an external series microstrip line is required.
7
RF OUT Same as pin 6.
8
VCC1
Power supply for the bias circuits. An external RF bypass capacitor of
22 pF is required. Keep the traces to the capacitor as short as possible,
and connect the capacitor immediately to the ground plane.
Rev A3 010720
2-81
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