MGA-53543-TR1 Avago Technologies US Inc., MGA-53543-TR1 Datasheet - Page 9

• 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

To accomplish the above performance, a high pass con-
figuration consisting of a 3.3 nH inductor and a . pF
capacitor is used for the input match. Unlike a low pass
configuration, a high pass configuration provides not
only the impedance transfer required, but also provides
excellent stability for the demo board by diminishing low
frequency gain.
No matching is required for the output, but a good rule
of thumb to use when biasing is to limit series reactance
to less than 5Ω and keep shunt reactance above 500Ω.
Therefore choosing an RFC of 47 nH, which has a reac-
tance of 561Ω at 1.9 GHz, helps isolate the DC supply from
inband signals. If any high frequency signal is created or
enters the DC supply, a 150 pF capacitor is ready to short
it to ground. An 8. pF capacitor serves primarily as a DC
block, but also helps the output match.
The completed 1900 MHz amplifier schematic is shown
in Figure 10.
RF
Figure 10. Schematic for a 1900 MHz stable circuit.
Included with the schematic is a complete RF layout (Fig-
ure 15) which includes placement of all components and
SMA connectors. A list of part numbers and manufacturer
used is given below in Table 3.
Table 3. Component parts list for the MGA-53543 HLA at 1900 MHz.
3.3 nH
47 nH
2.2Ω
2.2 pF
8.2 pF
150 pF
0.1 µF
Performance of MGA-53543 at 1900 MHz
With a device voltage of +5V, demonstration board MGA-
5X delivers a measured noise figure of 1.78 dB and an
average gain of 14.5 dB as shown in Figure 11. Gain here
is slightly lower than data sheet due to the losses acquired
in creating a stable broadband match. Input and output
VSWR are both better than :1 at 1900 MHz, with input
return loss being 10 dB and output return loss at 13 dB.
9
in
3.3 nH
2.2 pF
TOKO LL1608-FS3N3S
TOKO LL1005-FH47N
RHOM MCR01J2R2
Phycomp 0402CG229C9B200
Phycomp 0402CG829D9B200
Phycomp 0402CG151J9B200
Phycomp 06032F104M8B20
1
3
53
2
4
+5V
2.2Ω
47 nH
8.2 pF
0.1 µF
150 pF
RF
out
Figure 11. Gain and Noise Figure vs Frequency.
Figure 12. Input and Output return loss vs Frequency.
More significant is the linearity delivered by MGA-53543
at 1900 MHz. Figure 13 plots OIP3 over a frequency range
from 1850 MHz to1950 MHz.
This device produces IIP3 of 4 dBm, OIP3 of 38 dBm and
P1dB of 17.8 dBm at 1900 MHz.
Figure 13. OIP3 vs. Frequency.
Due to component parasitics and part variations, actual
performance may not be identical to this example.
Figure 11. Gain and Noise Figure vs
Frequency.
Figure 12. Input and Output Return Loss vs
Frequency.
Figure 13. OIP3 vs Frequency.
-10
-15
-20
-25
20
15
10
45
40
35
30
25
-5
5
0
0
1840
1.6
1.6
1.8
1.8
1880
TX
FREQUENCY (MHz)
FREQUENCY (GHz)
FREQUENCY (GHz)
2
2
1920
2.2
2.2
S11
S22
Gain
1960
RX
NF
2.4
2.4
2000
2.6
2.6