MGA-83563-TR2G Avago Technologies US Inc., MGA-83563-TR2G Datasheet - Page 14

• 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

14
Table 2 summarizes measured results for this particular
amplifier at 2.5 GHz.
Table 2. Performance Summary for 2.5 GHz Amplifier.
The power-added efficiency (PAE) in the saturated mode
is 36% as calculated from:
Note the current increases slightly from small signal
conditions to the 1 dB compression point, then falls ap-
preciably as the amplifier goes into saturation. (The 1-dB
compressed output power will be higher for amplifiers
that are tuned for linear performance.)
P
The output match of the completed 2.5 GHz amplifier
was held fixed while various values of L2 were substitut-
ed for the purposes of (1) verifying the optimum value
for L2, and (2) determining the sensitivity of P
to the value of L2. These results are plotted in Figure 31.
The data in Figure 31 indicates there is some trad-
eoff between tuning for maximum output power and
maximum efficiency. The original choice of 1.5 nH for the
interstage inductor L2 appears well optimized.
Figure 30. Input and Output Return Loss of
the Completed 2.5 GHz Amplifier.
sat
Small Signal
-10
-15
-20
-25
Saturated
-5
0
and PAE Sensitivity to Inductor L2
Mode
G
2
-1dB
PAE =
PAE =
2.2
INPUT
FREQUENCY (GHz)
6
(P
2.4
out
P
OUTPUT
P
P
– P
DC
RF
DC
Gain
22.0
21.0
17.8
(dB)
in
2.6
)
2.8
Output
Power
(dBm)
19.2
21.8
3
—
sat
(mA)
148
165
139
I
d
and PAE
The results of this tuning process supplied the 2.5 GHz
data point referred to in the Appendix that was used to
create Plot B of Figure 47.
Output Match Sensitivity
The sensitivity of P
capacitor in the output matching circuit was investigated
by varying the value of C2 while noting P
current. The input power was fixed at +4 dBm for this test.
The length of the series line between the output of the
MGA-83563 and C2 is also part of the matching circuit.
This line was not considered as a variable in the sensitiv-
ity analysis since photo-fabrication of micro-striplines on
circuit boards is highly repeatable.
P
Inspection of Figure 32 reveals that a variation in C2 of
±10% is acceptable for most applications. The most im-
portant observation of this data is that the PAE remains
high for values of C2 that are toward the left of the
maximum P
begins to drop off toward for higher values of C2. This
data points out the importance of choosing a value for
C2 that is toward the lower side of the maximum P
point (lower C2) in order to maintain high efficiency with
production tolerance components.
sat
19.5
18.5
22.5
21.5
20.5
25
20
15
10
21
5
0
23
22
20
19
18
Figure 31. 2.5 GHz P sat and PAE vs. L2.
0
and PAE for each value of C2 are plotted in Figure 32.
0
Figure 32. 2.5 GHz P sat and PAE vs. C2.
0.5
sat
point (lower values of C2), while the PAE
0.5
1
sat
1.5
and PAE to the value of the shunt
P
sat
L2 (nH)
C2 (pF)
2
1
P
sat
PAE
2.5
PAE
1.5
3
sat
3.5
and device
2
4
50%
45%
40%
35%
30%
25%
20%
15%
10%
40%
35%
30%
25%
20%
15%
10%
sat