MGA-83563-TR2G Avago Technologies US Inc., MGA-83563-TR2G Datasheet - Page 8

• Manufacturer Part Number: MGA-83563-TR2G
• Description: IC AMP RFIC GAAS 3V 20DBM SOT363
• Manufacturer: Avago Technologies US Inc.
• Type: Power Amplifierr

Specifications of MGA-83563-TR2G

• P1db: 19.7dBm
• Package / Case: SC-70-6, SC-88, SOT-363
• Current - Supply: 152mA ~ 200mA
• Frequency: 500MHz ~ 6GHz
• Gain: 23dB
• Rf Type: Cellular, ISM, PCS
• Test Frequency: 2GHz
• Voltage - Supply: 2.7V ~ 3.6V
• Operating Frequency: 500 MHz to 6 GHz
• Operating Supply Voltage: 4 V
• Supply Current: 200 mA
• Mounting Style: SMD/SMT
• Number Of Channels: 1 Channel
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Noise Figure: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

8
Figure 19. Values for Interstage Inductor L2.
In order to prevent loss of output power, the value of the
RFC is chosen such that its reactance is several hundred
ohms at the frequency band of operation. At higher fre-
quencies, it may be practical to use a length of high im-
pedance transmission line (preferably O/4) in place of the
RFC.
The value of the DC blocking and RF bypass capacitors
are chosen to provide a small reactance (typically < 1Ω)
at the lowest operating frequency.
Since both stages of the RFIC are biased from the same
voltage source, particular care should be taken to ensure
that the supply line between the two is well bypassed
to prevent inadvertent feedback from the RF output to
the drain of the first stage. Otherwise, the circuit could
become unstable.
The RF Input (Pin 3) connection to the MGA-83563 is at
DC ground potential. The use of a DC blocking capacitor
at the input of the MGA-83563 is not required unless a
circuit that has a DC voltage present at its output pre-
cedes the RFIC. Although at ground potential, the input
to the MGA-83563 should not be used as a current sink.
0.9
0.8
0.7
40
30
20
10
1
9
8
7
6
5
4
3
2
0.5
1.0
1.5
FREQUENCY (GHz)
2.0
2.5
Step 3 —
Output Impedance Match
The most interesting aspect of using the MGA-83563 is
arriving at an optimum, large signal impedance match at
the output. A simple but effective approach is to begin
with a circuit that provides a small signal impedance
match, then empirically adjust the tuning for optimum
large signal performance.
The starting place is to design a circuit that matches the
small signal *
pedance required to conjugately match the output of
the MGA-83563) to 50 ohms. The small signal S-param-
eter data for designing the output circuit is taken from
Table 1, using the data corresponding to be nearest
value of interstage inductor that was chosen in step one.
A RF CAD program such as Avago’s Touchstone can be
used to easily calculate *
the Table 1 S-parameter data for the particular design
frequency of interest.
As the MGA-83563 is driven into saturation, the output
ml
3.0
(the reflection coefficient of the load im-
ml
. Touchstone will interpolate