MGA-53543-TR1 Avago Technologies US Inc., MGA-53543-TR1 Datasheet - Page 7

• Manufacturer Part Number: MGA-53543-TR1
• Description: IC,Microwave/Millimeter Wave Amplifier,SINGLE,SOT-343R,PLASTIC
• Manufacturer: Avago Technologies US Inc.

Specifications of MGA-53543-TR1

• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Table 1. OIP3 vs. supply power.
Voltage
(V)
1V
2V
3V
4V
5V
Matching
The most important criterion when designing with the
MGA-53543 is choosing the input and output-matching
network. The MGA-53543 is designed to give excellent IP3
performance, however to achieve this requires both the
input and output matching network to present specific
impedances (Γ
to match this part for best NF or best gain. However, this
will impact the IP3 performance. To achieve best noise
figure, the input match will need to be modified to pres-
ent gamma opt to the device. To achieve the best gain
will require both the input and output to be conjugately
matched (which will also result in the best return loss).
Where needed, the match presented to the input and
the output of the device can be modified to compromise
between IP3, NF and gain performance.
The MGA-53543 has isolation large enough to allows
input and output reflection coefficients to be replaced
by S11 and S.
In general matching for minimum noise figure does not
necessarily guarantee good IP3 performance nor does
it guarantee good gain. This is due to the fact that the
impedance parameters shown below in Table  are not
guaranteed to lie near each other on a Smith Chart. So,
ideally if all input matching parameters lied near each
other or at the same point, and all output parameters also
lied near each other or at the same point, the amplifier
would have minimum Noise Figure, maximum IP3 and
maximum Gain all with a single match. Typically this is
not the case and some parameter must be sacrificed to
improve another. Table  briefly lists the input and output
parameters required for each type of match while Figure 4
depicts how each is defined.
Figure 4. Definition of matching parameters.
7
Gain
50Ω
IP3
NF
Match
Input
S11*
Γ
Γ
opt
S
Γ
Γ
S11
opt
S
OIP3
(dBm)
0
17
28
35
39
S
*
*
and Γ
53
S22
Γ
L
*
L
) to the device. It is also possible
Γ
S22*
L
Output
Match
Id
(mA)
4
16
24
41
51
50Ω
Table 2. Required matching for NF, IP3, input & output Return Loss and
Gain.
Match
for
IP3
NF
RL
RL
Gain
PCB Layout
A recommended PCB pad layout for the miniature SOT-
343 (SC-70) package used by the MGA-53543 is shown
in Figure 5.
Figure 5. Recommended PCB Pad Layout for Avago’s SC70 4L/SOT-343
Products.
This layout provides ample allowance for package place-
ment by automated assembly equipment without add-
ing parasitics that could impair the high frequency RF
performance of the MGA-53543. The layout is shown with
a footprint of a SOT-343 package superimposed on the
PCB pads for reference.
A microstrip layout with sufficient ground vias as shown in
Figure 6 is recommended for the MGA-53543 in transitioning
from a package pad layout as in Figure 5.
INPUT
Figure 6. Microstripline Layout.
0.039
1.00
in
out
RF
0.024
0.60
Input
Tuning
Γ
Γ
S11*
none
S11*
53
0.045
1.15
0.051
1.30
s
opt
Dimensions in
RF
OUTPUT
Output
Tuning
Γ
none
none
S22*
S22*
L
inches
0.079
0.035
2.00
mm
0.9